Give me advise for this schematic.

[psychepool]

Hello.
I made several diy amps and do the mod too.
But I'm not majored in electronics so my diy skill is just limited to copy the verified schemaitc.
Nevertheless, I had some idea that I want to make, so I draw a schematic with mix several circuits.
If there is a problem, please check it.

http://s935.photobucket.com/user/psyche ... sort=3&o=0


Here's the discriptions of the idea.

I want to make classical marshall tasted amp with individual clean channel.
Basically, I don't need very much gain but sometimes I play with hi-gain too.
Many JCM800 modded amps has very nice sound but I think they're far from classical marshall sound.
I searched many circuits and sound clips, and finally I choosed Bogner XTC.
The schematic and sound of XTC is very simmilar with plexi or 800. I think it has the classic marshall vibe. So I draw the scheamtic with based on it.

I need the individual clean channel but most of the marshall-ish amps has fender-ish clean channel schematic. XTC was the same.
So I planed to make the clean channel with plexi bright channel circuit.
I like the plexi clean tone more than the fender clean tone. And It has a merit for the crunch tone.
In fact, XTC has plexi mode in the lead channel, but it's not the indivisual channel. So I independente the plexi circuit and remove the original fender-ish clean channel.

XTC has extra gain stage mod. But the current configuration that I drawn, the tube will play halfway.
So I use the power mosfet for the extra stage.
I asked a question about the idea but I got a bad feedback.
https://tubeamparchive.com/viewtopic.ph ... highlight=
Frankly, It's not imfortant part for me. It's just "better than nothing" part for me. So, I would be satisfied if it only operate. Of course, I can remove it if it makes a problem.

Power supply is the most difficult part for me because I'm not majored in electronics. And I can't find the simmilar examples like this amp.
Bias supply is from JCM800(AX84 Renegade). Relay supply is from Marshall silver jubilee. But I can't design the main B+.

That's all about the circuit.

FX loop is a temporary sample. It can be replaced with other circuits include SS circuit.
Please recommand a good circuit.


The writing became longer. It need to organize.
The key questions are:
1. Is the power supply circuit is OK?(values of parts, supply route for preamp, etc..)
2. There's no mute circuit. Is there any popping noise when switch the channel?
These two things.

And if there is a part that needs revision or improvement as a whole, I would appreciate your advice. Thank you!

[Stevem]

Where is your ground for the first filter stack and the voltage balance resistors across them?

You do not need 3 diodes in series on each leg of the V+ winding , as today's diodes are far better then the days when Fender had to place 3 in line like that to get enough reverse voltage capabilitie!

What current output do you need from your PT in terms of the V+ needs and the filiments, do you know how to determine that?

[psychepool]

Oh, miss the ground is just a mistake. I will add the ground sign there. Thanks!
I didn't decide the output power. So nothing is fixed about power transformer specs.
May be it would be 35~50W with 5881 or 6L6.(for plexi channel get enough clean headroom)

I correct the mistake.
http://s935.photobucket.com/user/psyche ... sort=3&o=0

Is there additional problem elsewhere? Check it more please.