Glad I just found this one. I have a Trinity Amps Triwatt kit that I built a few years ago. In "stock" mode it sounds really great and is one of my main amps. It has a high gain circuit on a pull knob that, as designed is completely unstable, WWWAAAYY too much gain! I did some quick and dirty modding to make it useable but have never been happy with that feature. I'm hoping to revisit the design over the winter and make some improvements to the gain circuit. This series will be a great help. Thanks for this!
Brad, the Hiwatt front panel material is called Traffolyte (engraving). We used to get a lot of these made for industrial automation control cabs. It's pretty cheap and a lot people are set up to do it.
I built a clone of the JTM45 I used a 3h chock then changed it to 20h chock and noticed a improvement to the sound much sweeter sounding amp and have noticed the big chock you are using.
So why don't they have an effects loop in the 1959 100 watt reissue as standard, whereas apparently they do have one as standard in the 1987 50 watt reissue?
That looks pretty damn cool! Question...could an A-B switch box be used between the guitar and amp to switch between the "Plexi" and the JCM 800" front ends, for switching on the fly?
Good to hear from you mate! These Marshall modders are really on another planet, man. I don't think I've EVER seen mods done well. I blame the internet.
Haha, how does the mating ritual work...physically? Does one heads input jack plug into the others input jack? Or do you plug into the speaker output? Is that illegal in some US states? Is Input to output unhygienic? My dirty mind boggles😂
For the 1959, why couldn't the owner use an A/B switch out of his guitar or pedalboard, to select the 1959 jack or the 2203 jack. I do something similar to select what amps I want on.
WRT proposed circuit - no point using a 33k input R - it's a hangover from guitar amp designers devoid of Johnson noise understanding. 33k will make a lot more noise (23nV/rt Hz) (hiss) than a decent 12AX7 (from 6 to 10nV/rt Hz). Only needs to be a few k. FYI - Johnson noise calculator = squ root of ( R value ohms x 3.312x10^-16 ) in uV RMS (20kHz BW, 20 deg C) or / 141 in nV per root Hz. What this also means is that for every doubling of R value, there is 1.41 x noise - so a 1 meg resistor has 3.1 x noise of a 100k resistor. People see Carbon Comp resistor and think *noisy but it's the value of the resistor that makes baseline noise - then add extra for type. Example - 100 ohm Carbon Comp resistor = low noise, 3 meg metal film resistor = a lot of noise.
I go with about 10K on my designs, but this is not a complete redesign. The top two channels are just indicative of what the existing circuit looks like.
I had this weird dream, like at 1:30am last night you were in your garden, drinking beer, holding court with about 6 or seven of us. "Six" was there too! What a dream! You had to be there! Maybe you were?
This is the first time I've heard of a hot shield technique, and it occurs to me that the shielded cable also functions as a capacitor from grid to anode.....
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
Good to have you back welcome to 2024
The parody during the intro was excellent, super funny, you nailed it!
Glad I just found this one. I have a Trinity Amps Triwatt kit that I built a few years ago. In "stock" mode it sounds really great and is one of my main amps. It has a high gain circuit on a pull knob that, as designed is completely unstable, WWWAAAYY too much gain! I did some quick and dirty modding to make it useable but have never been happy with that feature. I'm hoping to revisit the design over the winter and make some improvements to the gain circuit. This series will be a great help. Thanks for this!
It's great to have you back. Hope your holiday was great.
Brad, the Hiwatt front panel material is called Traffolyte (engraving). We used to get a lot of these made for industrial automation control cabs. It's pretty cheap and a lot people are set up to do it.
I built a clone of the JTM45 I used a 3h chock then changed it to 20h chock and noticed a improvement to the sound much sweeter sounding amp and have noticed the big chock you are using.
Happy new year's mate keep up the good work.
Love it Brad!
Welcome back! And happy new year!
Love the _David Attenborough-ish_ intro! 🤣
"I reckon this is a f**k up" Missed you brother!
Keen to see a Brad Amp series, maybe include one to rival the new JTM20?
Awesome gain mod! Reminds me of a Deliverance (movie not amp) SQueeeeeeeeeel!
So why don't they have an effects loop in the 1959 100 watt reissue as standard, whereas apparently they do have one as standard in the 1987 50 watt reissue?
Another awesome vid, cheers !
The 2203? It is the one with the high and low channel input on top of one another correct?
Did you draw the tonestack correctly? 100k cathode but its an anode follower.
No I did not. Well spotted. You win a gold star!
Looking forward part 2
That looks pretty damn cool!
Question...could an A-B switch box be used between the guitar and amp to switch between the "Plexi" and the JCM 800" front ends, for switching on the fly?
Absolutely fantastic ❤😊
You get all the fun stuff.
Getting a look under the hood of these “reissues” reminds you why Dave Friedman exists.
BAD versions are nothing like Dave's originals, though. They're of mass-produce construction as well.
“Ok let’s try this gain mod… Ok at one stage there is actually less gain” 😂
Love listening to your work, mate!
Good to hear from you mate!
These Marshall modders are really on another planet, man.
I don't think I've EVER seen mods done well.
I blame the internet.
Gday champions is back
Haha, how does the mating ritual work...physically? Does one heads input jack plug into the others input jack? Or do you plug into the speaker output? Is that illegal in some US states? Is Input to output unhygienic? My dirty mind boggles😂
I'd be up to buy a BGG valve amp.
Oh man, im up for a BGG JCM800 clone!
So solder is not like silicone? The bigger the gob, the better the job. No?
For the 1959, why couldn't the owner use an A/B switch out of his guitar or pedalboard, to select the 1959 jack or the 2203 jack. I do something similar to select what amps I want on.
He could, but perhaps would need to lift a ground on one of them to avoid a ground loop.
Awesome Stuff! can't wait to see your 50W versions in action! Should do a "BGG" on the faceplate where the JMP or JTM would be!
WRT proposed circuit - no point using a 33k input R - it's a hangover from guitar amp designers devoid of Johnson noise understanding. 33k will make a lot more noise (23nV/rt Hz) (hiss) than a decent 12AX7 (from 6 to 10nV/rt Hz). Only needs to be a few k. FYI - Johnson noise calculator = squ root of ( R value ohms x 3.312x10^-16 ) in uV RMS (20kHz BW, 20 deg C) or / 141 in nV per root Hz. What this also means is that for every doubling of R value, there is 1.41 x noise - so a 1 meg resistor has 3.1 x noise of a 100k resistor. People see Carbon Comp resistor and think *noisy but it's the value of the resistor that makes baseline noise - then add extra for type. Example - 100 ohm Carbon Comp resistor = low noise, 3 meg metal film resistor = a lot of noise.
I go with about 10K on my designs, but this is not a complete redesign. The top two channels are just indicative of what the existing circuit looks like.
YAY!
About time
Yeah, good album, that one.
Reminds me of highschool!
what ever happened to part 2 ?
ruclips.net/video/TeOVJyPyxBc/видео.htmlsi=zHI6BDhJ0Mc7nujN
The 1959 LPS is Sounding pretty thin here to my ears ... but it's known that it should be cranked up at very high level to sound full.
"Ducks nuts". LOL!
Gooday champions
I had this weird dream, like at 1:30am last night you were in your garden, drinking beer, holding court with about 6 or seven of us. "Six" was there too! What a dream! You had to be there! Maybe you were?
Haha, yeah. I unlisted the video as it was just a test and it got a bit sweary after a few beverages.
The hot shield thing all comes down to the SIR #34 mod. So stupid.
I agree. There's nothing like having 200+ dc potential on your input.
This is the first time I've heard of a hot shield technique, and it occurs to me that the shielded cable also functions as a capacitor from grid to anode.....
@@goodun2974 yup, that’s part of the reasoning for it. It rolls off treble and such and is supposed to lower oscillation.
Slow down the cct diagram zoomies please mate my multi-focal equipped eyes can't keep up :P
Sorry mate, I'll try.
Germanium diodes.... I've fucking seen it all now. hahaha
Pinky and the Brain. Yes😂😂😂
A ducks nuts???? QUACK!!!
The anode connected hot shield is bizzare - oscillation for free - who's doing this utter crap?
Buy engraving equipment youll make a fortune
Keen to see a Brad Amp series, maybe include one to rival the new JTM20?