Thanks Les, that did the trick. Thought LEDs were much longer living than that !
LED's may have gone short circuit. Try another pair as they are in series and known to fail. I doubt if the resistors have failed and you must have the supply else your output valves would be over heating like mad i.e. outside plates glowing cherry red!
Hi, I always read you passionately! Greetings from Italy! I'm doing an upgrade on my 1995 mc10L, first series, the one with external capacitors ... at sight. I wanted to change the 4 x 470uf 250v 85 ° capacitors with 4 x 680uF 450V 105 ° C Kendeil K05 LONG LIFE LOW ESR TUBE AMP AUDIO CAPS. I was wondering if you know that the rectifier bridge can hold bigger capacitors, in this case from 680uf ... I don't want to do damage also because the rectifier bridges are really hidden and impossible to reach! I have some doubts that we can mount 4 x 680uf because on the PCB there is' written 330uf..so I think that already bigger capacitors have been mounted than expected. I hope for your answer!
Uff not looking forward to that...
Meanwhile I replaced the preamp 1K resistors with the same Takman used on the rear. Very good and worthwhile, expanded the soundstage sideways noticeably
HI, sorry but for this mode i need 2 or 4 resistor 1k/2watts? i suppose 2! many thanks
Hi, it's safe doing no feedback mod (cut capacitor+resistor leg) without applying triode mode (original UL)? From previous posts it was clearly evident applying after T. mod.
Q.2,, for triode mode, I need add a 100 ohm resistor to ground right after disconnection from OT?
Thank you
Q.2,, for triode mode, I need add a 100 ohm resistor to ground right after disconnection from OT?
Thank you
Last edited:
- Home
- Amplifiers
- Tubes / Valves
- Yaqin mc10L