Fender normal channel mods I believe these are mods Diaz most likely did to SRV's Vibroverbs. I used the normal channel bright sw as a channel switch for now, I'll build a relay system later. Oct 13, 2010 · Fender Bassman Ten tone mods 10-13-2010, 02:53 PM. I've been trying out both of this methods for a while now, all with great success, but I've found number 1 to work the best with my setup. Jan 19, 2019 · I do think there's merit in substituting a Marshall-style preamp circuit in place of the normal channel, but you need another tube to pull it off . The "Normal" position is highest gain, the "No Bypass Cap" position is a Aug 12, 2021 · MOD DETAILS: https://krusekontrol. Setting up the Normal channel first (this means setting up the volume and eq to your preference) and then setting the Vibrato channel (just eq) and rolling up the volume till you find the sweet spot. 047uf on the normal channel (so, less bass passes to the next stage). 022uf, instead of . Power supply caps will be 2x80uF F&Ts in series with 220k balancing resistors for 40uF 600V and the rest 22uF, solid state rectified. Lead Channel Mod Do something constructive with your unused Normal channel. His clever mod lets you have that high-cut only with the more drive, keeping highs in the normal drive channel. 2a — The first step of accessing the output of both stages of the normal channel before it enters the phase inverter and output section of the amp is finding the blue wire indicated and disconnecting it from the resistor. It took my od's and fuzz very well. 6G6A (1962-1964) As above. Captures cover a wide range of amp settings. As above, with slightly different tone controls in ‘Bass’ channel. This is also a very popular mod in AB763-similar circuits (Super Jun 8, 2017 · The Custom '68 VR has some mods to the 'normal' channel to voice it differently. First, the vibrato channel has a 47pf bypass cap on the volume control, between the EQ and the second gain stage, to allow some (far) highs to sneak past. you use, they will connect electrical but they will be out of phase because of different tube gain stages on ea. The Vibrato Channel has the Normal Channel's topology but adds the reverb and tremolo (vibrato) effects into the signal chain and has another preamp gain stage to make up for losses incurred by the reverb Jan 18, 2019 · QuoteI also find the volume control for the clean channel is VERY twitchy at low volumes, and often end up using the overdrive channel simply because I can turn the gain and volume down. A push-pull DPDT adds a stage after, when in the vibrato channel. One of his most popular mods is the Ultra Phoix mod. . Many people cut this cap. This is also a very popular mod in AB763-similar circuits (Super, Twin, Vibroverb, Pro Reverb, Deluxe, Vibrolux). com/fender_mods/twin_reverb SATURATED HIGH GAIN BROWN SOUND Normal Channel becomes Oct 29, 2015 · This mod is relevant only for two-channel amps with normal and vibrato channel. asp Kind regards, Mary May 14, 2008 · The Normal channel is a modified Fender type preamp with adjustable sensitivity and three band passive tone stack. Nov 14, 2007 · I already thought about working on C3 to reduce high content in the drive channel (that cap forms a low-pass RC filter with R8, reducing high frequencies above 6. sdorer Posts: 46 Joined: Sat Jan 31, 2009 4:46 am. Imho, Fender did not quite go far enough in their mods to that Custom channel. thats the coolest thing about that The following seven mods add versatility but are switchable so I can run the amp as a normal 5F6A. net/jazzamp. Jan 17, 2016 · Tremolo disconnect mod – More preamp gain in vibrato channel. Sep 19, 2005 · I'm not sure I follow your jumpering though. What's nice about this is the way you can dial in just the amount of volume and tone you want to mix in the signal. 6G6B: As above. qrp. V1 12ax7 = Preamp bass channel V2 12ax7 = 2’nd gain stage bass channel (and normal channel for AB165) V3 12ax7 = Preamp normal channel V4 12at7 = Phase inverter V5 6L6 = Power tube #1 V6 6L6 = Power tube #2. The Fender "Dumble" mods that are bouncing around, are little things that he supposedly used to do Feb 8, 2024 · I'll bring sluckey's TDR schematic in for reference which helps in ignoring the normal channel. I plan to wire the Normal Channel per the schematic with Martin Manning's 350k tapped pot alternative. Reverb and tremolo. The Benson was an obscure amp designed with Howard Roberts well known studio guitarist. The drive channel has slightly less gain and a touch more cleaner, and more matched to the clean channel. May 6, 2011 · The switch, at the moment, only enables the signal to flow between the post-volume knob output of the normal channel to the grid pin of the first half of the vibrato channel (via a . FENDER DELUXE REVERB BROWN MODhttps://krusekontrol. In the stock mode, the normal channel does not have vibrato or reverb on it, but the vibrato channel has both. Mar 8, 2010 · With the treble bleed also installed in the normal channel, both have the same frequency response now, but the normal channel sounds even a bit better. I also suggest changing the Bright channel's 270k mixing resistor to a 470k to help the V2A gain stage handle overdrive from the previous two gain stages. Nov 23, 2007 · I already thought about working on C3 to reduce high content in the drive channel (that cap forms a low-pass RC filter with R8, reducing high frequencies above 6. 7nF) - when used normal ch. (Bass and treble controls have wide range adjustment with these tone stack values). Normal channel has ODS mod which changes the volume control to gain, and includes the addition of a master volume pot. I added a mid slope control. , rotate "treble volume" pot above 50% - bright cap 47pF on the normal volume Jul 31, 2014 · But if we disregard the gain channel and focus on the normal channel, we probably can get the voicing closer to that of a JTM45. hence the 'Custom' channel designation. Changes in red. This mod applies to the older hand wired point to point amps. The patch link is usefull if you want to mix the channels. ’ Today we are going to go over a cool mod that can be made to the normal channel on any of the Fender blackface style amps (or repro kits); I will be performing this mod on my Deluxe Reverb Style kit from Mojotone. Many choices with this particular circuit. Plate load and cathode's are unchanged. With a Heyboer 40W PT driving 2 x 12" 100W celestions for really clean guitar with heaps of bandwidth. If you look at the preamp in the Bass channel of your amp, you will see that it can be converted rather easily to a Normal channel from a two-channel Fender guitar amp of BF/Sf era. I found the Bass channel in its stock form to be much too dark and a little dull (no sparkle). It uses the topology of the Bass channel, but the tone stack of the Normal channel plus a mid pot. thousandshirts Jul 8, 2024 · The only mods to the circuit is Sluckey’s Trem-O-Nator and reverb and tremolo in both channels. Thicker tone with more midrange emphasis and lends itself towards earlier breakup. When stock, the best channel is the Normal channel. Jul 25, 2015 · The typical current draw on any preamplifier stage is never more than about 1 or 2mA. This modification separates the V1 cathodes Flames1950 Senior Member Posts: 9294 Joined: Sun Feb 08, 2004 7:04 am Location: Waukee, Iowa FENDER TWIN REVERB BROWN MOD on NORMAL CHANNEL http://krusekontrol. Lead Channel Mod Higher gain channel designed for cleaner, leaner, modern overdrive tone. Rivera mentioned in that video stand out as places I would start. Not a lot of differences between the two amps besides the name (I think that they wanted to cash in on the similarity to "'65 Princeton Reverb". Oct 3, 2015 · The "Normal Channel" on the Blackface circuit isn't often used and gives you a great platform to mod the amp for 2 distinctly different channels. Mar 3, 2011 · I'll do most of the tonestack mods on just the Normal channel and make it a Bluesmaster tonestack. The choke and output transformer both date to 1975, and I can personally attest to the fact that the vibrato channel has the sweet, lush characteristics of a vintage Fender. Tapped ‘Treble’ control in ‘Normal’ channel. But if you have to keep the volume under 4, then definately use the normal channel. Jun 23, 2024 · Transform your vintage Fender Blackface or Silverface amp with the Fargen Hot Mod, now available for purchase directly on our website. Mar 2, 2011 · Adding reverb & trem to the Normal channel of a vintage Fender amp is about as simple as falling off a log. Channel switching it through a relay now. It's the same with Fender's other 2-channel BF/SF amps with onboard verb & trem. 022 uf caps (Photo 3). On the Ab763 circuit, I am used to the normal channel being louder than the normal channel but that is not the case here. Jan 4, 2018 · Magnatone showed us three killer amps that have their own flair. Cons: Some players might prefer a more dynamic, higher-headroom speaker. The normal channel plays MUCH nicer with overdrive/distortion pedals than the vibrato channel does. It gives you another whole tone option at your fingertips, and still full-on classic Fender! Sep 21, 2019 · Normal channel gain increase: R49 = R13 – jumper this for more gain. Sans the 'channel mixer' voltage divider - for really loud volumes. I think the Peavey's used a 10k linear pot and a smaller R10. just plug into input 1 of the normal channel, take a chord and connect input 2 of normal into input 1 of the vibrato channel. The Normal channel sounds like the Vibrato channel with the bright cap clipped so you get the sound you're after (no bright cap with reverb), plus you keep the sound of the Vib channel in case you ever need it. Fig. Top. 3M/10pf mixer ! Fender/dumble mod. The Lead channel will also be more pedal friendly than a normal Fender channel. talking about a simple FET: which can boost the gain and maybe with only 2 gain stages to play: around with, the normal channel would be a good place to put that. The Fender Bassman is a legendary guitar amp known to both guitar and bass players. This mod also puts the two channels in phase so you can jumper them for a thicker tone. It's just something in me that hates to leave that unused triode alone LOL! I'm researching the 5F6A Bass channel mod and also the parallel triode mod. pops. Bassman AA371 converted to AA864 (Holy Grail Blackface tone model) with PPIMV. All that's required is to lift the Normal channel preamp output wire from the phase inverter 220k input resistor and attach it to the reverb input, which is the "Z" spot on the board where the 3. You can plug your guitar into any jack and you will get a Hi jack-to-Hi jack jumper. What is your favorite mod to do to that unused Normal channel on a Fender amp. Tone stack curves below that for the fka Normal channel, now dedicated to ‘verb. Giro de Italia 2, mountain track: A Dual Pole 3 position switch directly after volume pots: pole pos 1: Normal channel V1A cascaded into Bright channel V1B pole pos 2: Standard configuration pole pos 3: Bright channel V1B cascaded into Normal channel V1A It may seem complicated but it's rather simple to do. The Cascade Channel mod is simple to do and simple to reverse if you ever want to go back. com/category/fender-mods/ • NORMAL Channel becomes organic Overdrive Plugging into the Normal channel automatically puts the extra stage upfront, and plugging into the vibrato channel is stock. It was my main gigging amp for 10 years, before I started building. And, the channels are now in phase so you can jumper Modify the amp so that you have a vintage style normal channel and a reverb channel with push pull switch so you can have the bright and normal sounds Upgrade the Output Transformer for better sound These mods run $375 with the trade in value of the old OT. This mod is not applicable together with the Pull V1 mod, as you need the normal channel preamp tube. Oct 2, 2009 · Well I did a little soldering yesterday on my 135w UL Twin. This is also a very popular mod in the AB763-similar circuits (Super, Twin, Vibroverb, Pro Reverb, Deluxe, Vibrolux). I used to love the normal channel as it is warmer and darker sounding to my ear but now Im starting to like the vibrato ch. Slow the Tremolo Slow is good. I'm definitely looking to get the amp to open way up from standard Blackface on that side. If you want some insane gain from the reverb channel, jumper across the 3. These are minor mods, easily reversible if you ever want to return the amp to stock, original condition. 047 uf, but we’re going to remove them from the board and replace them both with 0. Nov 24, 2015 · He started out in California with a small amp shop where he specialized in modding Fender amps. This is also a very popular mod in AB763-similar circuits (Super, Twin, Virboverb, Pro Reverb, Deluxe, Vibrolux). Big difference. Anybody have a schematic or web site with mod directions ? Sep 2, 2014 · I've built a single channel AA864 Bassman head that is essentially combination of the bass and normal channels. If you get the Bass channel involved you'd be patching twice, from the Normal to the Bass and from the Bass to the second head's Normal? Hello and welcome to this month’s Make It Monday, which is actually going to be more of a ‘Mod It Monday. It's been quite a project, but really does a nice job of fender/marshall in one amp. Tremolo disconnect mod – More preamp gain in vibrato channel. But the trimmers mod ²Thom suggested works great! You can eq the drive channels to sound really good both! : I’m looking for a way to “hop-up” the normal channel in my: (non master) Fender Twin without adversely effecting the vibrato: channel. The Vibrato channel has two big things that alter tone. ) Mar 12, 2022 · add master volume ken fischer , in normal channel jazz /rock and global feedback 4k7/ 22m accent fixed 1uf for upper mids. I think this is because there is no reverb circuit in the normal channel (I didn't attach the reverb and vibrato foot-switch to the amp and switch of the reverb when testing). Hi all, newbie here. G. STARTS AT $400 https://krusekontrol. My Bluesman Modwill give you all of this without any permanent British Mod - Bassman Marshall Conversion Nov 15, 2011 · The Bass channel is substantially different from the typical front end of any Fender blackface or silverface guitar amp, so we will leave this channel alone. Get great tone out of your Fender Twin Reverb at a lower volume without spending a penny. Tremolo Cut Switch Mod Add a lot of preamp gain with this simple and very useful mod. I considered doing this to my Bandmaster but kinda fizzled out after the Trem-O-Nator mod. Soundwise you will get more mids and a warmer tone. All the switches are set so IN = Normal. Sep 13, 2009 · IMO, you're better off doing the one-wire mod to add reverb to the Normal channel. There are some really great mods for the vintage ones where you can actually eq the reverb by wiring it into the normal channel in a particular way. Transform it from a way too loud beast to a sweet tone machine. I reworked the tone circuit in the normal channel to fender specs, and the entire boost channel to 2204 specs, I used a mosfet as the cathode follower. Try jumpering Bright & Normal channels. Summary. all you need is an rca to 1/"4 jack patch cable. Our service doesn't stop there. Aug 31, 2009 · Does anyone have any layouts or schematics of the mods Dumble did to the ab763 Bandmaster? I'm doing the ab763 boost mod on schematic Heaven to my bandmaster's normal channel. 8k. As above, with linear-taper ‘Volume’ control in ‘Bass’ channel. this mod gives you complete tmb control over your reverb (and a bright switch). e. The normal channel does not. Note - I will be using the amp for guitar. Sep 19, 2007 · Mine sounded pretty bad when I got it. Thoughts? Vr J. This was the source of the mod and it would have been close to the . Wondering if there's anything else I could do to spice it up. but i find the vibrato ch a bit bright with my fuzzface type pedals and some od and dist pedals I know a lot of people here are doing mods to their vibrato channel to make it sound not too bright. Aug 25, 2020 · Phase in these cases is either in or out 180, there's no "close enough". Thanks for any thoughts If the AB763 - 2 Channel amps are 180 degrees out of phase as Fender designed them changing the normal channel tone stack from coming off the plate to coming off the cathode would put them in phase. You still can retain some of the Fender mid scoop by keeping the mid control below 2 on the control. FENDER NORMAL CHANNEL REVERB AND VIBRATO MOD This mod incorporates the existing reverb and vibrato on the Normal Channel of Fender vintage 60s and 70s Blackface and Silverface amp. The second input jack was removed and in place, a gain knob was added in -The circuit for the amp was converted back to my favorite year of fender amps, 1965 Fender Normal Channel Reverb Mod Apply reverb and tremolo to both channels the way Fender did it in the 68 Custom Deluxe Reverb. It routes a silverface amp's Normal Channel through the reverb and tremolo effects and through the V4B third preamp gain stage. You do not have the required permissions to view the files attached to this post. disposing of the reverb circuit to this end will leave you with a pretty bastardized blackface Fender. Who knows? Maybe someday you’ll invite a bass-playing friend over for a low-volume jam, and you’ll actually use the amp the way it was originally designed: Amplifying one bass plus one guitar—a completely acceptable idea at the time. 4k only with the drive/more drive channel). The Normal Channel has the 5e6 front-end tone stack, giving it a nice Tweed sound. Tones: Ease of Use: Build/Design: Value: Street: $2,499. 3-Position Negative Feedback Switch with: Normal 5E3 / No Bypass Cap / NFB for three levels of preamp gain. Tie the Normal channel into the tremolo effect. Analog has nothing to do with it; any pedal can go either way. Just to add for anyone interested in modifying the ‘bass’ channel, something I did is the “Gerald Weber tweed mod” (google) which converts the ‘bass’ channel to a tweed type channel (early break up & warm tone etc), it works great on it’s own (classic tweed sound) & adds deep ‘tweed’ body when blended with the ‘normal Fender Deluxe Reverb BROWN MOD (player Jens Kruse) . Post by jester » Sat Aug 23, 2008 3:02 am Does anyone have a good simple dumble gain mod for fender normal channel? Maverick. This is negated once you cranked the volume up above 12 o'clock, but at that point you've run out of clean headroom in the preamp. The mod involves removing the reverb from the Normal channel, lowering the gain of the pre-amp, increasing the caps on the reverb to make it fuller, replacing the tone stack capacitors with higher quality caps, removing the protection diodes on the… Mar 22, 2008 · For your information. Also, has more inverse feedback. . There's even a switch option shown below so you can switch between a completely 'normal' 5E3 and this cascade mod. Either way, you can easily get a single channel Plexi preamp. I can put this on a switch Jan 28, 2009 · I’m working up a mod for a stock early-70s Silverface Pro Reverb that will get recapped and converted to AA165 (same as AB763 generally in other models) and tested like that first. If I remember correctly you can't use both at once because they have different tube stacks depending on which chan. The article you wrote on the Supro (“Modding a Supro 6420 Thunderbolt") got me inspired to try this. The 6G3 (brown face) Deluxe is like the 5E3 (last tweed) Deluxe in that each channel is made up of 2 gain stages prior to the phase inverter (start of the Power Amp portion of the circuit), and that both channels share the 2nd gain stage. https://robrobine FENDER BANDMASTER BROWN MOD on NORMAL CHANNEL. For the Drive channel I tried the C11 mod with 1nF and 1,5nF and fixed it a bit but still wasn't a good overdrive sound and the More Drive wasn't good at all to my ears. Normal Channel is rerouted to Bright Hi input jack switch terminal. I did the same thing to my 5E3 normal channel but I can't find the values documented anywhere. I'm adding the 100kB Mid pot to the back of the chassis. 012 uF akavalve used since I don't remember auditioning multiple values. AA270 (1968-1983) 3 x 7025 The modification to the Normal channel will give it a very different voice from the Reverb/Vibrato channel and using a quality A/B box you can transform your amp into a two channel machine. Worthwile on a Fender normal channel? Jul 26, 2024 · some of the newer Fender amps have reverb on both channels, so the gain of the normal channel is the same if not more than the trem channel as it doesn't have the trem pot loading. Use Bluesmaster values for the PI also and tune it for a 12AX7 instead of 12AT7. Remove the buss wire that runs from the junction of the plate resistor and slope resistor to the treble cap and install your 2200pF mid boost cap (I have installed two 1200pF caps in parallel here). Oct 26, 2017 · This also places both channels in phase with each other, so you can jumper them together for a bit more "girth" to the sound. And using my OD pedals of course are distorting this same direct-sounding tone. com/category/fender-mods/• NORMAL Channel becomes organic Overdrive Channel• Gain ranges from SRV BLUES to Aug 14, 2015 · ‘Treble’ control is after 3rd gain stage. Sep 17, 2007 · the old discussion forum trick is to take the output of your reverb tank and route it into the input of channel one. With the increased value of vintage equipment today many of my mods to not add any holes to the amp chassis. Reducing bass and adding a Master Vol. As a result, the Normal channel will always sound more dynamic. Eas Nov 5, 2016 · Again, this is just my own approach to completely remove the normal channel and the tremolo circuit, to make the blackface a single channel amp. Feb 2, 2006 · I then used the normal channel faceplate holes for drive, ratio and master controls, and wired V1 for OD1 and OD2 with 70's specs. but lets keep it simple, this is good pedal platform, so when you build good jtm/bassman amp, you need only master volume (also this can work against the tone if the slider is positioned less than 70% of rotation because of lack of presence, life, and problematic trancking on the pots between the channels) and maybe to tame bass I used the Marshall 1987 Plexi as my roadmap for this "Lead" channel mod. your reverb is now a lot like a fender 6g15 reverb Feb 24, 2009 · i don't know that this will make it sound more like an original, but have you tried jumping the channels together? you get this awesome crunch out of it by driving the normal channel and using the vibrato channel as a master volume. Of course the by-product of this mod is that when in the Normal channel AND the switch engaged, you get a stage before and after. If I ever get another Fender 2 channel reverb amp I'd like to make the Normal channel a JAZZ channel by rewiring it to a Benson preamp. Lead Channel Mod I voiced the Normal channel for a tight, modern Marshall overdrive tone but left the Bright channel unmodified. Mar 24, 2015 · The James TS gives classic fender mid scoop when all pot rotations are at mid-point. They also had foot switches to toggle the reverb and tremolo on and off. Someone correct me if I'm wrong, flying off tip of Oct 15, 2006 · yea i usually use the normal channel also, but last night we got cranking alittle bit, so i went to the vibrato channel, and the tone was amazing. Two things Mr. The mod is dead simple, it just involves clipping the leg on one resistor and adding a jumper wire. It works but the exact result depends on the amp you are converting. May 22, 2018 · I use the normal channel mainly for clean jazz or blues. Nov 1, 2017 · The typical Fender values here are 0. All the latest fender amp mods news, videos, and more. Aug 16, 2023 · Even when disengaged, the effects on the Vibrato channel pull signal and degrade the sound. Photo 3. changed the jacks for switchcraft like, get rid of that chinese jacks! Mar 15, 2011 · The amp sounds fantastic but he bass channel does have significantly less bass when compared to the Normal channel. Mar 16, 2006 · The normal channel really lends itself to this mod. Like the AB763 circuit. Vibrato channel was modded to blackface specs. For the Bass Channel, I am thinking of taking Roe's suggestion of going with a K50 preamp. Controls: ODS Channel: V=Master Volume G=Gain T=Treble B=Bass Vibrato Channel: V Tweed Preamp in the Bass Channel: We convert the first (normal) ch to a tweed preamp! The tweed preamp mod in the normal channel is an excellent option and a great voicing. All details: Tremolo disconnect mod – More preamp gain in vibrato channel. 68-2uF) - smaller coupling capacitor (2-4. Therefore an A/B/Y box could be used. (Mod changes this cap to 100pf, and has a "brilliance" switch that puts a 68pf cap in parallel with the 100pf) Top Boost treble cap: Nov 9, 2017 · Reverb and vibrato available on both channels. Jun 9, 2007 · Sort of (seriously, that's the best answer). It's a simple and easily reversible mod that sends the Normal channel output into the Bright channel's input for an extra gain stage. Remember that for stereo pedal outputs, they work by reversing the wet phase on the second outputso if you feed that output to reversed-phase channel, the effect will be lost to a degree, while the dry signal will be OOP and possibly sound like poop. In my search for the illusive Schematic and secret information surrounding the mod, I came across this article "Cool Mod for the Normal Channel" You can read up on it at the following link. The difference the Mark Moyer mod makes on a Fender Custom Vibrolux Reverb is astonishing. The bass channel is an Ampeg type still using 12AX7's but with Ampeg type impedance, gain staging and two band baxandall tone controls. This is also a very popular mod in the two-channel AB763-similar circuits (Super, Twin, Vibroverb, Pro Reverb, Deluxe, Vibrolux). I didn't changed the clean channel (R9!) because I already liked it that way. Then, the drawing below is what I’m thinking for the preamp section. In order to match the clean channel low freq response to the drive channel i have removed the bypass cap across C104 AND C104 as well. I wanted to share the mods I've done to my SFVR. Fender 1972 Fender Bassman with Mike Ness mod. At that point, you can either leave the bright cap clipped or put it back and have two bright inputs on the vibrato channel and two normal inputs on the normal channel. The next attempt will use both gain stages of the normal channel. If you plug into the Normal #1 input of the first head, you can run a jumper to the Normal #1 of the second using the #2 input of the first head's Normal channel. Jan 31, 2009 · But the studio channel, with a few mods, is basically like the 'normal' channel of any silverface Fender. NOTE: This mod is ONLY for dual channel amps with reverb and vibrato in the vibrato from the Blackface and Silverface era (1973-1980), and does not apply to the Consider this list of my favorite AB763 mods: robrob Normal Channel Reverb Mod to add reverb to the normal channel. com/twin-reverb/Features: • NORMAL Channel becomes organic Overdrive Channel• Vibrato Channel remains 100% original CLEAN for k Apr 22, 2018 · In this video I'll show you how to modify a bone stock 1960s Fender Bassman AC568 or AB165 into a MONSTER amplifier using my "*AB*Normal Channel Mods. …: I seem to remember either Mark or R. Apr 13, 2008 · The end of the story is the BRIGHT channel is relatively quiet, and the NORMAL channel is the majority of the hiss. I like putting the reverb on both channels and then modifying the Normal channel and using an A/B/Y switch to use either channel. and either punching the chassis or i. It's my steel guitar amp; I need loud-n-clean for one of the bands I play in. The normal channel begins rather Fender-esqe and begins to take on a Marshall bite the more you turn it up and play with the EQ. The normal channel is mute because I lifted the connection between the normal channel's built-in . From the schematic, the fact that the NORMAL channel V1B socket 6 gets powered via the V2B socket 6 by a jumper, and not straight from the PCB board via the "X" source voltage used in the Vibroverb and the Moyer mod seems to be it. Fender Normal Channel Reverb Mod. The Plexi uses preamp component values to reduce low frequencies and boost high frequencies to offer a clean, tight, modern overdrive tone. I forgot to mention the previous owner made some modifications as well. The JTM45—like standard four-input 50- and 100-watt Marshalls—is basically a clean amp, with most of its distortion characteristics coming from overdriving the output stage. I didn't do the mods of brightness suggested at the unofficial HRDX page, by Justin Holton, cos I like my bright switch! I did change all cathod resistors 100k metal film 1/2 watts, even R57 and R58. Other changes. 1 — Once the wire from the wiper of the volume pot (middle terminal) in the normal channel NAM captures of my 1976 Fender Deluxe Reverb with Dumble ODS mod by renowned amp builder Ben Fargen. Also, the coupling cap on the vib channel is . chan. You won’t ever know about the piddly little voltage increase. I'll s Sep 26, 2016 · All the latest fender super reverb mods news, videos, and more. The power transformer is not original. 5E3 Deluxe With Cascaded Channels - Basic Mod. your volume control is now your reverb control. Fender '64 Custom Deluxe Since channel jumpering is so common among Fender players this mod will let you leave your jumper cable at home and jumper the Bright and Normal channels with the pull of the Normal volume knob. A simple AB763 mod to amps with Fender describes the Custom channel as Customizing and adding the effects to the old "Normal" channel makes the 68 Apr 13, 2003 · It's for mods for a AB763's Normal channel, three layouts. Mar 2, 2015 · DannyR8, I have never done this to an AB165 or later Bassman, but I do it to two channel FEnder reverb amps' Normal channels often. I'm not thrilled, but I think I've proven that this is possible. Instrument cable didn’t snap firmly into the normal channel’s input 1. Normal Channel conversion for foot-switchable 2 channels . Feb 13, 2011 · Have a 72' Twin that I'd like to put reverb on the normal channel, as well as the vibrato channel. If you snoop around a little on the web you’ll hear a 50/50% of people describing their bass channel like I do and the other half describe it as dark and wooly. Yes, on normal channels 1 and 2 get no sound and on vibrato 1 and 2 functions properly. I have no proof. The treble bleed cap on the normal channel is C8, stock is 120pf if you wish to muck around with that. Jan 23, 2019 · How to mod a Fender '65 Deluxe Reverb (DRRI) for better reverb control, normal channel reverb mod, normal channel Bassman tone stack mod (like a '68 Custom D Nov 14, 2011 · I have increased the gain on the clean channel and consequently lowered the bass level. Jan 9, 2022 · about jtm/ bassman types you can find many mods, a lot of infos. Apr 6, 2013 · When Fender replaced the 112+ with the Princeton 65 in ~2000 one of the changes in the Normal channel was replacing the 470R mid resistor in the tone stack with 1. Once you get to 4 on the volume knob, i guess the brightness goes away. This modification separates the V1 cathodes FENDER NORMAL CHANNEL REVERB AND VIBRATO MOD This mod incorporates the existing reverb and vibrato on the Normal Channel of Fender vintage 60s and 70s Blackface and Silverface amp. Do you not see anythinng different in the scheme vs layout Martin? The Vibrato Channel in the AB763 is very different from the Normal Channel, so much so that many AB763 players never use the Normal Channel. com/dual_showman_mod/Features: • Normal Channel becomes organic Overdrive Channel• Vibrato Channel remains 100% original fo Fender Amplifier Mods: Add overdrive and channel-switching to a Silverface combo amp and you have an ideal gigging amp. This channel is very pedal friendly and really responds to boost pedals. This simple mod is how Fender added reverb to the 68 Custom Deluxe Reverb's Normal channel. but lets keep it simple, this is good pedal platform, so when you build good jtm/bassman amp, you need only master volume (also this can work against the tone if the slider is positioned less than 70% of rotation because of lack of presence, life, and problematic trancking on the pots between the channels) and maybe to tame bass Nov 27, 2017 · I've left the normal channel mostly stock and really want more gain on the modded side. I also do the Diaz 2. Feb 4, 2014 · Your twin has 2 input channel, ea has input tube dedicated to it, one for plain, another for reverb channel. Jun 23, 2021 · The Trem-O-Nator only uses one tube, thus freeing up a triode, and it sounds much smoother and stronger than the original Fender tremolo. The aforementioned Bright cap. Jan 12, 2012 · IMO, the best DRRI mod is the "Fritz Mod" which puts both channels in phase and adds reverb/vibrato to the normal channel. I've been looking for a layout over a schematic; I'd feel much safer with a layout so I don't damage anything. I read a post on a steel guitar forum from a guy claiming that modifying the tone stack on your SF Twin to 'tweed' specs drastically improved the sound, he claimed it even made it a lot louder. The effect of this mod is similar to pulling the V1 normal channel preamp tube when playing the vibrato channel. Fender AB673 Normal Channel Mod http://www. I've searched and collected virtually every mod I could find on the subject and tried them out . 1 uf and 0. The 1x8 Starlite Reverb is still the single-ended 5W combo with a single 6V6 & 12AX7 that can bark between a black-panel and tweed, but now it includes Accutronics Digi-Log reverb that has optimized gain stages ensure the reverb seamlessly integrates with the amp’s natural sound, preserving the true classic tone of Magnatone amps. Send us your hand-wired amp, and we'll upgrade the normal/bass channel to our signature Ultra ODS Style channel, delivering creamy lead guitar sustain that replaces the old, unused channel. I've heard it really opens up these heads. This trick is great for the reverb enthusiasts among us, and who is not? Plug your guitar into the vibrato channel, then unplug the reverb return cable on the back of the amp (the one that comes from the reverb tank output) and plug it into the normal channel input. Basically it is replacing the BF clean channel with a Dumble clean channel. 047 cap and the PI input. Aug 10, 2021 · - smaller cathode capacitor (0. My warped idea is, change the caps on the normal channel to brighten things up, & leave I used the Marshall 1987 Plexi as my roadmap for this "Lead" channel mod. 1 — Once the wire from the wiper of the volume pot (middle terminal) in the normal channel is Sep 26, 2016 · Fig. This ‘mod’ works because without the ‘Normal’ channel 12AX7 in place, the signal from the ‘Reverb’ channel can’t bleed back through the ‘Normal’ channel as much and get loaded down. Nov 28, 2023 · DETAILS: https://krusekontrol. When I built my version of a TDR I incorporated the Master from sluckey's schematic (and loved it) - R7 1ooK Jul 11, 2006 · I the good old days before FX loops became common in amps we used to use the Normal channel on Fender amps like the Super Reverb, Deluxe Reverb and Twins as a FX loop from the Vibrato channel, I still use it today. Home May 12, 2015 · Mine is a stock one. Specific attention is paid to the treble caps here. We WILL NOT drill your blackface amp for a mod, so don’t ask ;) The popular mods in ‘standard’ blackface Bassman AB165 amps include: AB165 to AA864 Conversion: This is the Bassman version of the ‘blackface mod’! Mar 16, 2020 · So yesterday I tried amp using headphones Input, and IMO, it almost sounds like I'm going direct- amazing Fender Clean detail, but rather tinkly and and sounds like a Fender amp model. I modded the normal channel on my Tweed Deluxe to approximate values taken from a 50 watt Plexi lead channel as inspired by Rob Robinette. Aug 31, 2007 · I'm probably going to start out with doing the Andy Ruhl AB165/AA864 hybrid mod. That will give this channel more of a mid-flavored British tone, which is a nice complement to the stock “vibrato” channel. 047uf cap). Forming a divider from R12=2k2 and a 50k pot like the Fender is going to be touchy. 3Meg resistor & 10PF cap come together in Dumble did start out as modded Fenders before he started building his own circuit and such, and my tech figured out a topology that turned the normal channel into the Dumble side. 7K cathode resistors for V2 A and B too. High Gain Brown Mod on Fender Dual Showman Normal Channel Video. That channel has more midrange than does the Vibrato channel, which yields chimey cleans all day longas do all of the AB763 Reverb channels, ime. I have had a few AC30's over years; back in the seventies you could pick them up cheap. Normal-channel bright-cap-removal mod greatly expands versatility. I still play it occasionally, so my goal was to keep the vibrato channel as close to 100% stock as possible, while putting to use the normal channel's triodes. qbxotk iel tqr letme xorns nbdymyn nfny oaayf nqlt fsp