Tube Amp MODs : The V1 PolyMorph | Easy | Cheap | Glorious!!
For around 10c this easy Tube Amp MOD can transform you amp | The V1 PolyMorph MOD
Schematic + Extra Cap Values (Plus Members)
https://waylonmcpherson-shop.fourthwall.com/supporters/videos/89645
Become a Member (Free to Join)
https://waylonmcpherson-shop.fourthwall.com/supporters/sign_up
Waylon McPherson Guitar
Instagram : https://www.instagram.com/waylon.mcpherson.guitar/
Facebook : https://www.facebook.com/waylon.mcpherson/
My Originals Project Whiskey Soho
Insragram : https://www.instagram.com/whiskey.soho/
Facebook : https://www.facebook.com/WhiskeySoHo
Spotify : https://open.spotify.com/artist/2aKUFNIIyw4HFv8bfErq1O
My Day Job “McPherson Stompboxes NZ”
Facebook :https://www.facebook.com/McPherson.Stompboxes/
Website :https://mcphersonmusic.site/
00:00 The MOD
01:08 Where Does It Go?
04:54 Installing it
06:19 The Switch
08:39 Fender Mode
10:02 Marshall Mode
11:46 EP3 Mode
14:11 Simple Is Great!!
#Tube #Amp #MODs #PolyMorph #Easy #Cheap #Glorious
Originally posted by UCJ3XgOrT16oJQRUkFCJVNNw at https://www.youtube.com/watch?v=GRTkLZUnZgc
Love this Mod! Simple but very Powerful!!
I know from personal experience that You Tube compresses the signal, I didn’t we were hearing the same thing.
The EP3 Was absolutely my favorite tone. I have a fender twin reverb reissue and I know I can do the mod, just what exactly did you do to the v1? Or at least how do I get the twin to sound like the Ep3? I'd like to give this a try. Thanks in advance.
22uf 1.8k increases gain and bass filter to 4hz.
1uf 1.8k gives 88hz filter
22nf 1.8k is 4khz filter
If you would really like to open app the flexibility of the amp. Pull the 220k for a 150k. Change 2nd stage to a 150k add in a 1uf cathode cap. Third stage disconnect the cathode follower add in an irf820. Use the second tube stage as a recovery/ boost or gain stage. Put an ldr in there as a negative feedback loop and you have options for compression or add an lfo you have tremolo.
id personally want something like this but variable
ima check if this can be done in my vox ac15, maybe turn it to a marshally amp ????
I really like it.
Makes me wonder why manufacturers don't add a 5 way switch with different values to scroll through if it's so cheap. Seems like a no brainer to me..??? What am I missing?
the ep middle sounds sweet
the 1uf with the 1.8k is already the marshall tone because the cap value is referenced to the resistor .do the math
An EP3 is not tube based and it never ever was. That would be an EP1 or an EP2. I have a mod that changes the tone stack of a Fender to scoop more like a Marshall amp, but the gain will be about 3 or 4 dB down. If you have the OLD plug into the wall Boss GE10 that will drive an amp into clipping like an EP3 pedal. Instead of 9VDC those old GE 10s run at 26 VDC so lots more gain and headroom. Van Halen used the GE10s to push his Marshall amps, with lots of midrange.
I have always found when drilling holes into a metal tube amp chassis. If i take the metal shavings and sprinkle them like parmesan cheese into the preamp section, The Grim Rreaper taps me on the shoulder, And says {are you sure about that }. If i place a metal shaving in the power amp section , the Grim Reaper, takes my hand and says { your coming with me ! } This might sound funny to those who know but SERIOUSLY do not mess with a tube amp unless you really really know for sure know what you are messing with. These tube amps can kill you faster than you can imagine. One slip of touching the wrong thing at the wrong spot and your heart will stop beating. You wont die from the shock but it will make your heart stop. YOU HAVE BEEN WARNED!
Sounds great – thanks for sharing.
Hi gain on neck is stupid. be realistic.
3:57 that made my eyes water a little 😉
I do something very similar in my preamp design, with a 3-way switch, but I change the resistor as well as the cap. It's really no more complex, and lets you get quite close to the exact Fender and Marshall front end circuits. My circuit has a 2.7k resistor always present. Then, in "M" position, it parallels a 680n cap. In "F" position, it parallels both a 25u (or 22u) cap, and a 3.3k resistor. The result is pretty close to Fender's 1.5k. The middle position just leaves the 2.7k resistor, no cap, which is also a useful voicing. Glad to hear that other people are into this convertible front end concept!
no switch position for the original sound of the amp ?
Would this mod would still work for single ended amp i.e champ style amp ?
Isn't the cap just before 3 minutes a microfarad not nanofarad cap? You say it twice..
Did a mod similar to this on my jtm45 reissue. One side of the switch is stock setup with the tied cathodes on v1 and v2. The up position separates the cathodes and adds a bypass cap on v2 which normally doesn’t have one. Gets it a little bit closer to 1959/1987 preamp territory although obviously not super close because of the totally different tone stack topologies.
FYI, uF is microFarad, not nanoFarad.
I wonder if there is such a thing as a variable capacitor that could span the range of values you want, but instead of discrete different values you could have a knob like a pot for continuous changes?
I'm impressed. The EP3 mod really makes single-coil pickups shine. Every Strat player should investigate this. Absolutely beautiful sounds. Love to hear a P90 through this.
It only costs about ten sints? ????
What’s the best pedal to make a blues jr deluxe sound like a jtm 45 ?
Thank you for posting. Food for thought, Informative ????
Thank you for this information, extremely useful and well explained. Nice playing too bro. Cheers ✌️
Edit: I subbed ????
Iirc, the JCA20 is the Crunch channel of a JCA 50, correct?
I have 50 combo, and I was wondering if the gain channel could be independent of this mod? As in, this shapes the Crunch channel and leaves the Gain channel stock?
Either way, since the stock amp is such an underrated beast itself, I think I'm going to adapt this into a 3 dpdt switch mod.
Crunch or Clean
Clean: Fender or EP3
Crunch: Marshall or Soldano (stock)
Maybe add a Marshall/HR50+ (stock) switch on the gain channel, too.
Fix the FX loop, and I don't know what more you could ask from an amp.
Killer video, good tones, thanks.
This made me think of hovercraft amps, they turned modding these amps into a whole business essentially.
Waylon that symbol means 'microfarad' not 'nanofarad' so it's 1000 times larger value. It looks like 'u' but it has a tail in front , it's the greek character 'mu'.
your channel made me become the first to create a multi capacitor multi switch, yeah, i got three different capacitors on my les paul now i have the ability to go bright, dark and even setup a shortout option so if i use high gain on the shortout option it allows for a more cleaner and half output so it makes it change so much, mod your guitars and find your hidden tones..]
if anyone uses this multi capacitor mod please shout me out as i did create it.
I saw this in a Kendrick design. If I remember right he called his Fender, Vox, Marshall. Don't remember the capacitor values. Nice to hear it again
That's a seriously cool ass guitar.
Why not just lift the bypass cap completely? Bypass resistor sets the gain for the stage, bypass cap EQs it.
I didn’t know sheep played amps.
Now I’ve got to find a schematic for my amp. I’ve looked before, but won luck.
I was skeptical until I heard what you did. I was super impressed with the sound of the Fender mod. It really sounds like a cranked Super Reverb. Also, the Marshall sounds were very good. It sounded great all around. But I was really impressed with how well the driven sounds match the originals. Congratulations!
Cool! Definitely convincing tones for a couple bypass caps on a three way switch. The EP booster PCB on a popular diy pedal site (easy to figure out the name)is really cool. Lots of fun switcheroos on it available on the top. Not just dip switches inside. Very useful pedal. Dig that Strat style guitar ya got there ,too.
My MesaBoogie is like that EP3. I plugged up a tube fender and a Marshall combo to get closer to that sound in the 80s, then I heard a Mesa, that was it. I have been using a Subway Rocket ever since.
Not smart in my opinion to try a home diy on a device that can kill you, best left to a qualified person….electricity can kill a person stone dead -and it's ….silent…..odourless….and doesn't give anyone a hint, simply never worth it as a diy unqualified.
Cool!! What values did you end up using?
I wish those that mod amps would run frequency response software to prove or show what the changes do.
Checked the Bugera V22 schematic and happily found the mod is already pre-done! ????
No no no you gotta buy tons of tubes and try them all until youre convinced of a change to get tonal difference! Cant just change the actual circuit, where would we ever get with that? :p
Now, indeed, the voicing can be changed with the different bypass capacity. Though it is not just a simple thing. If you are in the bright channel of some Marshall amplifiers, they will have extremely small coupling cap in that channel, and it will make way less difference as if it would be the standard 22nF coupling cap. So you would need to change that as well because 2.2nF ain't gonna let lows true.
The second thing is that sure bypass cap adds gain and changes voicing, but it changes signal by applying certain low-end EQ curves. No bypass cap gives linear full range response but with lower gain. The point is that a good amplifier designer has taken whole parts of the schematics in calculation. With things as complex as they are in the world of electric guitars, everything matters, and everything is also dependent on other things. Plus, things have one effect at one level and different effects at different levels.
Like when you push lows first they get louder. Though once the amplifier can't make them louder, it compresses, and other ranges get louder, and the complete tone is different. That compression could be nice and musical or just crap. Like treble booster or fuzz. With clean settings, it might be awful and harsh. Once compression hits the needed level, it suddenly becomes smooth, creamy, and musical.
The very same things are true with designing amplifiers. You can go all to the output section, and the amplifier will have one character, and dependent on the solution used, it can be a very different amplifier at the end.
Use stiff power supply, big iron, powerfully output section, and your amplifier will sound different. Use just a bit smaller output transformer, and it will start saturating and sound different. Use less filtering and looser power supply, and it will be a completely different amplifier.
Sure, experiment and choose what you like. Just don't cone back running when things get wrong. I can't even count the number of cases where people want to return their amplifiers to stock and ask professionals to do it.
You tell them that bad idea. They say, but it works. And it works until exactly what you told them will happen happens.
If you want to experiment, sure learn about everything you can and get good.