Thank you Steve. Yes it's the output transformer

I forgot to say i live in France

Hello everyone, i fried my Vintage Modern OT today, i just forgot to plug the speaker i stopped the amp almost imediately since there where no sound but too late ...Now i have a really weak and distorded sound even cranked ...I fear it's the OT . Does someone knows where i can get a replacement one,...

I did some mods, i prefer this grill cloth over the black one, and i put two 1 ohm resistors on the el 34 sockets for biasing the amp . I also change the tap for nfb from 4ohms to 8ohms, the amp is more controlable and sweeter like this i feel . It's really a nice amp and i manage to have good tone ...

The wall voltage is around 230 v on my house so i set the voltage selector on 240 v . This amp sound huge !!!

Thanks :Cheers ! Yes the g12t75 in this amp sounds really nice, not scoop at all . Some say it's an improved g12-65 with just a different thing wich result in 10w more in handling power . There's some minors fixes i did, the resistor before the gain pot was 720 k, i replace with a 470 k, the speaker...

After Marshall released the Studio serie, i went to check them out on a shop at Lille . I found that i prefered the SC over the SV and i was ready to pull the triger ... My absolut dream would be a 4010 combo but i never had a chance to found one not too far away so i thought the SC would be a good ...

Yes, at that price i expect good quality materials and craftmanship . Thank for your answers

Hello, i'm interested by the Studio Vintage combo, but i would like to know if the cabinet is particle board or plywood ? i can't find any characteristic for this .. Thank

For me :
V1 Wattford Valve Retro
V2 Wattford Valve STR
V3 jj ecc83
V4 Sovtek 12ax7WA

And TAD KT66
I also have wattford valves kt 66 but i came back to the Shuaguang TAD that's are closer matched .

Yes you're right of course but i think that's the sag occurs at full throttle when the power supplie don't manage to provide the expected current on time . In fact my amp is now closer to a jtm45/100 but with only two power valves and less current on the plates (440 volts vs 560 volts for the jtm45/...

Hi machinegun1, the choke is 116ohms . The amp is really quiet and it feels a lot spongier and bluesy now . I think the choke is an improvement but with the previous mods it wasn't great, the resistor was better . Now with the exact topology of the JTM45, except for the ppimv, it sounds really good .

For those who follow this thread, i reworked the preamp to be a clone of a jtm45 . Shared cathode, 270k mixers resistor, slope resistor and treble cap, 27k NFB ..ect .., I think it gonna stay like this for a while . I've shorted the mid boost that's i never use and i think i will use the switch for ...