Efficiency of amplifier at full power is about 60%, so the best choice for power transformer is 2x of output power. For output trnsformer calculation you can use one of the programs for tramsformer calculation for tube power amps. Simply enter the corresponding primary coil impedance. All other para...

+/- 80V Not the bipolar 2x80V, single 80V or 75V supply. But winding transformers can be a pain in the a**... Yes, this is the main disadvantage of the project. You have to buld output transformer by your own hands, because there are no transformers with matching primary coil impedance. Does the mo...

I would want to propose to your attention two versions of SS guitar power amplifiers 40W and 90W In the proposed versions of the amplifiers used lateral mosfets because they have the transfer and output characteristics almost identical to pentodes that allows as close to a tube sound. They also have...

Old discussion topic https://www.freestompboxes.org/viewtopic.php?f=50&t=3643 Frequency response http://milas.spb.ru/~kmg/files/projects/cabsim/v30/afcv30.jpg Ecstasy CH1 http://milas.spb.ru/~kmg/files/projects/xtcfet/pedal/samples/denn/kmg_xtc_ch1_eq_thru.mp3 Ecstasy CH2 http://milas.spb.ru/~km...

This version have two options of assembly - for single and dual supply polarity. Construction allows you to add it to existing design simply by drilling hole for the output jack. http://milas.spb.ru/~kmg/files/projects/cabsim//v30/v30_3dS.jpg Shematics: http://milas.spb.ru/~kmg/files/projects/cabsim...

State of relays is holded by MCU
This schematics was designed for use mostly with tube preamps/amps, where current consuption by relays is not so important.

Example of 3-input/3-output switcher using 8-pin AtTiny AVR You can control your circuit using relay contacts, or do not use relay at all and use transistor collector outputs to drive analog switches or LDRs Algorithm of switching can be changed by software without hardware modificatios. Combination...

I want to offer you to look on this page on my website belonged to solid state power amplifiers http://milas.spb.ru/~kmg/fetpa_en.html This versions of amps have sound very close to tube ones. Only one disadvantage - you have to build output transformer by your owm hands, because there are no standa...

Added article about my way to emulate vacuum triode by mosfet (collectiom of my information on GTLab)
http://milas.spb.ru/~kmg/tubeemulation_en.html

And at 200V circuit work much better than at 30V.
All guys who plays on my designs notice wide dynamic range allowing to get sounds from clean trough crunch into deep distortion using only volume control on guitar.

I offer the article about using mosfets in gitar amps http://milas.spb.ru/~kmg/irf_en.html This is an opinion of one DIY`er and musician: KMG and OldMike, I hasten to share impressions and at the same time express respect for useful improvements to the CF using mosfet. Today I tested latest version ...

Most of pages on my website http://milas.spb.ru/~kmg/ translated on English, I apologize myself if the quality of translation is poor