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Maybe you're right. I'll try what you suggest and report back :) Thanks!

Sure. It's a simplified Fender AB763. The schem is the preamp with the DI Out. The Astrosim would go in between. You're talking about R3, correct? Thanks :) Cheers Sono

Well, actually I think you're right and wrong :) In Marshall style topologies the poweramp has an important part on color, texture, distortion etc. Fender topologies, due to their headroom are more transparent. I also agree with you about tube emulation is not going to be like a tube amp but...

Thanks a lot for your suggestions, Temol :) I know....but we gotta keep trying!! ;) Yes, more like no punch, like the note's attack gets shattered/compressed. Not easy to explain :) I did try the Simplifier but TBH it sounds a bit sterile to me... at least I couldn't make it "sound"...

I've already stated a couple of times thta it's based on a REAL TUBE PREAMP. The preamp has two 12ax7s working at 330VDC... 🙄

Thanks for your reply. I'm aware they aren't strictly power amplifiers, hence my question :) What I'm trying to achieve is to build a box into which I can plug a real tube preamp at the input and a mixer/soundcard/SS amp/FRFR monitor at the output abd make it sound an d feel like a tube amp :)...

No they're not. They are preamp + poweramp emulations. Hence my question: can I drive the poweramp section of any of these circuits with a REAL tube preamp and use a speaker emulator after the poweramp emulator without impedance problems? If so, would a buffer be a good idea akd a fix?

Could someone please help me answer these questions? Would it be possible to use the poweramp section of, say the Mofeta or the Thunderbird, with a REAL tube preamp and a speaker emulator after it? Would there be an impedance mismatch between the preamp output and any of these poweramp's...

I guys, sorry for my late reply. It was a solder joint.....usual suspects! :) Thanks for your input! Cheers Sono

I do have a meter, yes :) I will check the joints, pull out C6, C7, C8, and make sure they are ok and report back. Thanks :)

Thanks for your replies. I did check components values and they are ok. I'll try to post pics asap. Cheers Sono

Hi. Creach, Thanks for your reply :) The value of the components is Bass A250k, High B250k and Mid I didn't have a 10k so I used a B25k. Do you think that could be the cause? Unless I'm wrong about this, I would've thought that with the bass pot all the way up it should behave like any other...

I bought a Particle Accelerator kit from Musikding a while ago and built it. Sounded great with huge bass range. After that I built a clone for a friend and everything seems fine except that it lacks the amount of bass the original has and the bass pot doesn't seem to be doing much. Any ideas as...

Here goes Nathan :) I've put a 10uF/400v cap as C1 and left R6 as TH to be able to choose the voltage at will (up to 400). In the end I left out the clipping diodes I had added previously. The circuit deals very well with pedals, and saturates nicely and much better than the diodes. Same for...

This is the schematic with some mods to the original PA: Switch to make it compatible with russian 6NxP tubes and be able to place heaters in series/parallel, Switch to use 12ax7 at 9-12v, 2 options for diode clipping (diodes not specified on schem) and the most important part that needs more...

Excellent news! Is 125mW enough also for the plate resistors? I will definitely share what I come up with, Nathan. It's the least I can do :) Thanks Sono

Hi again guys, I would like to ask for some advice on this please: I want to build an SMD version of the PA. The idea is to get JLCPCB to produce the board and assemble the SMD components on it so I can add the TH ones later. I'm going mainly for 0805 resistors but I can't seem to find 1/4w ones...

Don't get me wrong Nathan, TBH the whole point of my question was "am I being paranoid?". I built this thing and the sound is really great. Through my amp the hiss doesn't bother me, it's kinda "natural" if you will, I mean it doesn't hiss more than the speakers if you know what I mean, and the...

Ok. I will accept Nathan's answer, although to be honest, I can still hear a difference between bypassed or engaged FX, especially on this audio I posted although Mr. Creach didn't want to listen to it, ignoring what I was saying.: With all due respect, I understand some things need numbers...

Ok. Please listen to this sample and tell me you don't hear a difference between the first half (before the click) and the second one. If you don't hear a difference I'll just shut up Before the clic the pedal is on bypass... I have tried different valves and different brands (JJ...