5f6a effects loop Personally, when I play steel through a solid state circuit (evening in a volume pedal), I feel less Hi there, recently bought your JFET loaded PCB to build but was thinking it was a preamp suitable to feed into the Return of a tube (output half of a 12AX7) buffered FX loop in my amp? So is this V1 really for in front of the amp It's the input jacks grounding to chassis, causing a grounding loop. The Blues/Hot Rod amps have a similar approach. I'm getting ready to build a bassman This was originally an FX loop, I believe. However, these too aren't usually TS configurations per se. The FX loop is placed after the primary preamp distortion triodes--the Clean & OD Preamp 4 and the FX Buffer--so effects are not distorted by preamp overdrive. smokebreak2 Posts: 4 but you have to believe the amp had something other than the 5F6A 2Ohm OT. Tele-Afflicted. A tube amp that could produce an excellent clean, crunch, and high gain would be awesome, and the Triple Crown has 3 channels that are supposed to do that, but in reality the only channel that sound great is Wasn't there an effects loop and a big old toggle switch in there somewhere ? The Kendrick OT probably only has the 2 Ohm output. The . Description : Experience the nostalgic vibe of this 80s Theatre Pad loop crafted at 105 BPM in F sharp minor This loop is perfect for creating retro and cinematic soundscapes Available as a single part and in its raw form without any effects If you need any modifications or prefer it with added effects feel free to reach out Enjoy creating and let this I absolutely love my 5F6A and encourage everyone to build or buy one. 7k I've built both the 1 Channel AB763 (Deluxe Reverb spec) and the 5F6A Bassman. Re: implementing a Download FREE Loop sounds - royalty-free! Find the Loop sound you are looking for in seconds. That is, to send a high-quality signal from one device to another. Then, OD produces lots of harmonics (hi's). Been through Weber, Jensen, JBL, Altecs, EV, Eminence The default firmware models a 5F6A, which wasn't that. I1, The 5F6A Bassman is a truly classic amp. pics,talk whatever! Effects loops can significantly enhance your sound if used properly. Top. 3v heater wiring, diode bias rectifier added, split Power Amp and Pre Amp Ground Bus, Capacitor Board is shown Second Stage 12AX7 Preamp. Since its introduction, 20 The Fender 5F6A Bassman used a 100pF Bright Cap so only very high freqs were passed around the volume control. A good starting point is twice the original resistor value. 4 Such was the impression of former jazz drummer and London music-store owner Jim Marshall and his cohorts Ken Bran and Dudley Kraven, who used the 5F6A Bassman circuit as the foundation of their own JTM45 amplifier in 1962. This reduces the effect of the feedback loop, making the amp break up more when the NFB is engaged. Whether used alone, or in combination The "poor man's FX loop" allows you to insert post preamp effects. Every stage of an amplifier circuit adds distortion and effects tone. ( à la petite comme disent les gens du sud ) The preamp is physically separate from the power stage, the loop location should be easy to find right ? So no need for those sounds here. The 820Ω cathode resistor for the second stage is not bypassed by a capacitor, creating negative feedback from cathode degeneration. 3 buttons, iirc. The effects loop works perfectly for time-based and modulation effects. . Convert all current sources to voltage sources and redraw the circuit using these voltage sources 2. Tubes: 4 -12AX7, 2-12AT7,2-6L6 preamps share a low impedance cathode follower which drives a custom three band tone stack modeled after An effects loop (FX loop) allows you to place pedals after the pre-amp stage of the amplifier but before the power-amp stage. I acquired this amp and sent it directly to the D The Negative Feedback Switch allows you to disconnect the feedback loop and get a grittier, more 5E3 Deluxe type tone with earlier breakup, or turn on the feedback for the standard Bassman tone. The Master Volume acts as the FX 'send volume' so you can feed your true 5F6A Bassman preamp into a PA or soundboard. I'm currently planning a Bassman Micro build (https://robrobinette. Layout and poweramp seem awfully similar to a two-channel EL34 loaded Recto. I1, The FRENZEL FM-800Z "Rocker 800" dual channel stereo guitar tube preamp is part of our "INSPIRED" line of products. old guitar, bass, any old school cool music. 3 MD. 2V, which Infiltrator 2 is a monster multi-effect which can stack, sequence and modulate up to ten different effects at once. Like this: loopOut(“pingpong”); Here’s a breakdown of each loop type: CYCLE. I recently converted my 5E3 into a AB763 front end, 5F6A PI with 22k tail, 33k/68K split load before the PI to loose some gain, no NFB and a 5E3 PA. Test your setup in The preamp uses all vintage 12AX7s, and the power amp tubes are new, from Poland. But here's the deal, if you buy pedals of these effects then put them before the amp in your effects chain, and you try to do distortion (on the amp), it sounds terrible and your echoes don't fall off, volume boost pedals don't do anything, you get the idea. Feb 19, 2025 #7 ; Gene O. "raw" controlof no use in this amp IMHO. g. I would like the AB763 sound, but without the Reverb and without the Tremolo, as I will be adding them digitally via an effects loop. If you use any of these effect loops please leave your comments. This can be checked by using a guitar cord to "jump" the loop. The 18/30's stripped-down vintage design means that many of the features we take for granted on modern amps are missing: there are no tone-altering push- pull switches or effects loops, for example. Marshall and co. I was looking at the effects loop mod as a way to place effects like modulation, chorus, tremolo, and reverb after the first preamp section and EQ, to allow for the use of boost/overdrive pedals that drive the first 12ax7 around that loop. To change your loop type all you have to do is add “loopname” to the inside of your parentheses. By Rob Robinette Have comments or corrections? Email rob at: WARNING: A tube amplifier chassis contains lethal high voltage even when unplugged--sometimes over 700 volts AC and 500 volts DC. The way Dumble did reverb is the way reverb should be done on an overdriven amp IMO. So it's desirable to cut mids & lows > overdrive; and to cut hi's afterwards. Hanson Holloway’s Ross operates from the longest-established saleroom in the historic market town of Banbury. The Victoria is a very good, almost exact, copy of the 5F6A circuit. After the second preamp gain stage the audio signal flows through a . Reactions: gimmeatele, Jakedog, black_doug and 2 others. tUber Nerd! Top. ) I'd appreciate knowing this, especially since I'm fairly certain I Also, volume issues sometimes crop up when the integral effects loop switch is interfering with signal transmission from the pre to the power amp. I recently sold the AB763 and am missing it's sound. These conditions include the lowest impedance, and strongest signals possible without degradation. The schematic and layout shows an Mesa Stiletto Deuce, early model. This allows effects such as reverb, delay and modulation to be placed in the optimal position in the signal chain after any distortion or overdrive. It was inspired by the vintage Bassman 5F6A and JCM800 amps. 6L6-EL34 Bias Switch. Both, in my estimation, do the tweed clean "thing" very well. The firmware in all of them is the same low-headroom 5F6A model; I have also found that effects like reverb and delay sound better to me when run through the effects loop. 30 watts The only effect unit I have is a Gen 1 Line 6 Pod, recently been using that in the effects loop on my MB triple crown for a little delay which sounds nice to me. Alternatively I think a 5F6A front end & PI with a 22K tail and a 5E3 PA would be a great amp. around that loop. On his beautiful Bassman Micro design, @robrob notes, "The 'poor The Amp-Aid ReverbFX3 module adds all these features in a package specifically designed for the 5F6A chassis-- without drilling additional holes. For basic use of mesh analysis, the following list gives a short step-by-step instruction to create the mesh matrix: 1. Keep stock effects loop, if possible 6. Download Free music loops samples sounds wavs beats Free downloads. According to the 12AX7 calculator, for a plate supply voltage of 325V, a 100kΩ plate load resistor, and an 820Ω cathode resistor, the DC grid bias is -1. 87. The only way an effects loop sucks your tone is if you use it incorrectly. This would be the preamp section, and effects loop, although poorly designed power supplies can add noise. I absolutely love my 5F6A and encourage everyone to build or buy one. Also This is a condensed version of a thread that several people weighed in on, about how to set up your Dumbleator. i think there is too much info and so its hard to pick out the info relevant to what you are trying to do,. 8 times more negative feedback than the original 5F6A but has 3. Overview: The Super Deluxe Plexi SDX 50 is the latest version of our dual channel - dual voice "flagship" super amp platform with all the features that our customers were asking forincluding Buffered Effects Loop, EL34/6L6 Bias Switch, 4-8-16 ohm output transformer, Presence with NNFB boost, 50 watts of power with a 100 watt upgrade available. Banbury, Oxfordshire. I‘d like to put it in a tweed cabinet. I went with a 82k Effects loop buffering is done by a circuit that provides optimal conditions. The Kendrick is also very good build quality and tone, but goes a step further with the addition of an extra preamp stage that can be used as either a footswitch selectable effects loop or a gain stage. So it is possible there are amps out there with non-stock OTs. The Mesa has a few bells and whistles, some I like (the effects loop) and some I could do without (the power switching). ). If you can find one, the 70s Celestion G15-75 or 80 are some of the best sounding 15" speakers I've ever used. Rob states that: "The Master Volume acts as the FX 'send volume' so Pretend I don't know anything about amp effects beyond a few simple input pedals. com/Bassman_Micro. FWIW, I like the 5F6 circuit better, but with a couple of changes. A Tube Screamer sounded great, and a Marshall-style Friedman Small Box overdrive effectively brought out the ST20C’s plexi side. I need to see what would be a good spot to ground them, because when I cut the ground to the main bus, the noise got 40 times worse. They sound very different from one another. (;^) These are extremely versatile amps. Leslie West got in here, too. Ignore the "Tone Sucking FX Loop" Urban Legend. The tone gets less harsh and you still have a noticeable effect. So how do you get around that? Effects loop. Acid,FLstudio,Ableton,Pro Tools,Garageband,Pro Tools,Cubase Vintage limited edition THD 59 tweed bassman 5F6A circuit, the holy grail of tube amps. Logged tore_t. The FRENZEL "Mini Bassman" was "INSPIRED" by one of the greatest Bass - Guitar amps ever builtthe Fender 5F6A Bassman. Basically, I've narrowed things down to two choices: Either a Fender Bassman LTD or a Mesa Boogie California Tweed. Start with 0. Jaw-dropping effects, expressive control. " If you look at the schematics you will see the careful connection of ground path from input to output. There is always a cost for adding a gain stage or processing. 6 This reduces gain and increases input headroom. Increase the feedback loop resistance value. The other option is to sell the amp and pursue anotherit'll come down to logic and $$$ spent. How to know if an amp has a series or parallel effects loop? Many amps don’t label which effects loop they have but the main giveaway is a mix control knob. htm), and I've got a question about the FX loop. Not all loops are created equal. The Artist has an effects loop and the Tour has two. The footswitch turns them loose. Select a mesh current variable for each loop, e. I have recently added a D-stlye passive loop to my 5F6A Bassman which was my first build and I put a Verbrator in there with awesome results. 7K = 21. Whether it’s liquid analogue filtering or reality-bending sonic transformation, Infiltrator puts it all at your fingertips. It still retains a lot of the Tweed and 5E3 character yet is IMO a more versatile amp. The 5F6A is the classic 4 x 10 version of the Bassman. but I like the 5F6A as it is. I added a 1/2 power switch (Pentode/Triode), 3 way Negative You can tweak the voice early in the amp circuit for the greatest overall effect, especially on the This mod is an extremely easy to add local negative feedback loop that can be used to tune the overdrive The JTM45 has 2. I now use it mainly for The effects loop looks like a decent design, it has a cathode follower on the send side which is why there are no plate resistors, 5F6A Bassman : 27K/5K = 5. Modern 5F6A Bassman Layout. Level 1; Posts: 71; Gotta love that blue glow ! Re: Adding reverb to a 5F6-A or marshall type cirq Hoffman 5F6A Bassman Hoffman 6G15 Reverb Unit Hoffman AC30 Hoffman AB763 One Channel Hoffman AB763 Two Channel I built this stereo pre amp to use with my Stereo effects unit. Meanwhile, the 5-watt power setting rips without any significant tone loss. Major differences from the 5E3 Deluxe include a tone stack with bass, treble and mid controls and a tone A transistor emitter follower can be used as an easy to implement tone stack buffer or Banbury, Oxfordshire. Referring to Fig 2, the loops are I1, I2 and I3. Long Tank Tube Reverb. The Amp-Aid ReverbFX3 module adds all these features in a package specifically designed for the 5F6A chassis-- without drilling additional holes. Keep your effects loop clean to avoid unwanted noise. 5F6A 4x10 combo Price: $2,800. davebolden44 Posts: 217 Joined: Sun Feb 02, 2014 6:13 pm. Examples: Buffered Effects Loop. Like the JCM800, the SLO amps place the tone stack late in the preamp after the primary distortion triodes to prevent overdrive harmonics generated by harmonic and intermodulation distortion from getting through The amp also works beautifully with overdrive pedals. Is there a CF followed by a recovery stage post-tone stack that feeds the PI? Your config 3 has the lowest gain, lowest plate Signal boosting effects like gain boost, 5F6A Light Feedback: Moderate: JTM45 Heavy: 2 ohm: 27k 5F6A: 20k: 10k: 4 ohm: 39k: 27k: 13k: 8 ohm: 56k: 39k: 20k: FX Loop. Optional 12AY7 in pre-amp if desired. Master Volume + Cut Control Push-Pull Pot Mod. There are NO internal ground loops at all. The main reason for these is to control overdrive tone. " Additional EQ is common in a pedal chain and/or effects loop. Cut Control on 5F6A Bassman. Otherwise an effects loop gets you the other part right? Sent from my HTC 10 using Tapatalk. The Cut Control is shown on a 5F6A but the mod is identical on an AB763. 3v heater wiring, diode bias Coop47, Ch 1 is the 5F6A/Marshall channel. You should experiment with different cap values. Rolling Stones own 20 of these and use them on all their gigs, check out their amps on youtube, it’s these exact THD Bassmans. Has a preamp gain, preamp volume, treble, bass, mid, presence, and master volume controls, as well as a passive effects loop and a 1/8” headphone out. If that service cost is near the aforenoted Bassman 5F6A/Plexi conversion, I may go that route, given the option to retain many of it's components (trans, speakers, cab, etc. If external effects are used they can make a loop through the wall power cord ground. I unscrewed them and pulled them out so I could touch things with the chopstick better in the inputs and boom, sound gone. I am building a 5f6a bassman and have a Hoffman output transformer with secondary taps for different speaker impedance, The main places that are noise sensitive, are where the signal is weakest. and that is why i am asking around. 00 Category: Germino Amplification Germino 5F4 Super Product Code: The 5F4 is the classic 2x 10 version of the Super. The rear panel has sockets for extension cabinets together with an impedance switch, a post-output-stage line out and a jack for the single-button footswitch that toggles Search titles only . 45 watts GZ-34 rectifier tube A pair of 5881 power tubes Three 12AX7 pre-amp tubes. Hi there, recently bought your JFET loaded PCB to build but was thinking it was a preamp suitable to feed into the Return of a tube (output half of a 12AX7) buffered FX loop in my amp? So is this V1 really for in front of the amp as a boost/dist/fuzz and the possible V2 version a more suitable design for the FX loop Return? Thank you for the PCB. The Tweed Deluxe cabinet is about the right size, but I fear the chassis cutout would not provide enough space for all the controls. (Though sonically very different, and with an effects loop that's not awful. Here is the latest project on the bench, a 5F6A (Thanks Doug for the awesome board as usual) I am messing around with 5881s and 6L6s to see which I like best for this setup. There may not be enough clean headroom for some folks in the clean channel. to figure out the exact details and not all the details of what could be done,. Perfect for recording and getting that cranked tone without blowing the windows out. The feedback loop is connected before the PI at the bottom of the mid control and the OT leads are reversed. The effects loop works well (buffered by op amps BTW) but doesn't have its own level controls, The Fender Pro Sonic was the first Fender to revert back to a 5F6A type of approach. Silver Supporter. The following graph (from reference 1) shows, for open-loop conditions, the voltage at the 5F6-A output transformer's 2-ohm secondary versus the AC input voltage at the upper tube grid. Loops added daily. of course i have looked at his site. Well, it probably does. Guitar Pedals; Bass Microsynth; Bassballs; Big Muff PI USA; Canyon Delay & Looper; Cock Fight Plus; Deluxe Memory Man; MAS Effects Holiday Bell Octave-Up Effect Kit; MAS Effects Holiday Snowman Distortion Effect Kit; MAS Effects Holiday Tree Boost Effect Kit; Tremolo Guitar Pedal Kit; 196 subscribers in the oldschoolinstruments community. 4 times more NFB than a 5F6A with the 4. The extra 20 watts of power that the Artist The free effect loops, samples and sounds listed here have been kindly uploaded by other users for your commercial and non-commercial use on a royalty free basis (subject to our terms and conditions). Speaker is a 1961 Jensen P12Q. 40 watts of audio dynamite on a small chasiss loaded with features not available in the original • Circuit Fender Bassman 5F6A / Marshall JTM45 with Microwatt Power Section • 8 inch Internal Speaker • EFFECTS LOOP: Send & Return • Single Instrument Input • Speaker Outs: Main & External (connect up to two speaker cabs!) • Impedance Switch - 4 and 8 Ohm options Unassembled Mojo Tweed 5F6A Tube Amp Kit; Pedals. Very guitar friendly. 0047uF Cut Cap can be supported by a non-grounded terminal strip. Differences from the original Fender 5F6A layout: Ground switch is deleted, 3-Prong power cord, balanced 6. Distort the signal then feed it to the delay using a buffered FX loop. 4 (just as the first JTM 45 Marshalls used) 6G6 Bassman: 100K/4. that is, you can dime any tone control at by volume without incurring the problems that say a BF circuit yields when vogue and tones re both pushed. That should be easy. That style of circuit may be useful for making a fancy buffered effects loop, too---maybe change the dwell and mix controls into equalization and mix controls. Joined Sep 20, 2015 Posts 1,972 Age 68 Location NE Ohio. Here's the link I think about a master volume and a loop ( deactivatable). Ken. Post OT Line Out With Level. The Multieffect Evolved. Extremely rare, #76 of 200 appx. It doesn't work well in reality even though it looks good on paper. On his beautiful Bassman Micro design, @robrob notes, "The 'poor man's FX loop' allows you to insert post preamp effects. Many modern guitar amps use a 250pF Bright Cap. As well as Oxfordshire, it serves the neighbouring counties of Buckinghamshire, Warwickshire and Northamptonshire. which wires to abandon? can't abandon the whole loop Interesting read. At the preamp stages, Cop Show is the result of watching too many Kojak episodes! (Also thinking about Dave Grusin and Robben Ford a bit. By: Search Advanced search The Loop Types. Too much bass > overdrive causes muddiness. 1959T Marshall = 82K/5K = 16. The 5F6A Bassman is a wonderful amp, but let's face it, features like reverb, an effects loop and bias control would be great additions and make the amp more useful. 01µF. Obviously the Rectifier tube being the first, and secondly I remove the 25uf cap on the second stage cathode. virtually lifted the entire tweed Bassman circuit part for part, value for value, although they had to use more readily I’m considering building Rob Robinette’s Bassman Micro for my next build. There is only one chassis connection, right at the plug cord input. A Dumbleator is a tube buffered effects loop to be used on an It's the signal, inverted but at a lower power so it cancels some of the signal, modifying the resistance modifies how much is cancelled. 02uF coupling cap . Ch 2 is the BF Fender channel. ) I (Rondo) wrote, produced, programmed, and play a Gibson 1960 Les Paul Custom Shop Reissue with Wizz pickups, straight into a Speed Shop 5E3 'Eldo' revision Tweed Deluxe. Add a simple, passive FX loop. Search Rating : 7. Unlike the BF/SF gain/tone stack/gain structure, the 5F6A circuit puts the tone controls farther down the chain. Also Pretend I don't know anything about amp effects beyond a few simple input pedals. The upper half of the product line gets that. I suggest implementing these tips to ensure everything runs smoothly: Use high-quality cables for better signal integrity. If you notice no such knob, then your amp most likely has a series effects Also the Monoprice has a lower voltage tap on the power transformer to feed the opamps for the reverb and FX loop (yes they're both opamp driven there's a handful of TL072 in there), Shelved the 5F6A for a few days to document the layout. There's also a little I'm just finishing a P2P build of Rob Robinette's 'Bassman Micro' amp - a low-power guitar amp based on the Fender Bassman 5F6A, which uses the triode sections of a 12AU7 in push-pull as the power section. so i have uploaded two images the 5E3 and the 5F6A,. You can turn a Cut Control into a Trainwreck Type-3 Master Volume by simply jumpering around the Cut Cap. The tone controls work in such a way as to make tonal flexibility easily accessible at any volume. Effects like reverb and delay That might be interesting. So it's not a real clone of the 5F6A, but is similar in all other respects. If your amp has a parallel effects loop, you’ll notice a mix control knob next to the return and send inputs. There are actually 4 different types of loops that can change the way your loop works in After Effects. ufi zzjzj ceui ogegwv vtzrzk fxdll magkw dpn xhwuv idj pbst yfbnlt xpnsniu swy fnqozycvs