commanderberti
Well-known member
hi does anybody know the ratio of the original SCT 800 mic transformer ? 12:1 ? or else? thanks
is the tube ok?Hi. I have a problem and maybe someone can tell me where to look for the breakdown: the microphone has lost sound completely. I just switched it on this morning, but there was no sound at all. No hissing, no whistling, no buzzing - no sound at all. Maybe someone has any ideas where to start looking for a problem with this sct 800?
my knowledge of electronics is not very much more, but I have checked the cables and they are fully functional) also tried installing a different capsule, which definitely works - nothing changed, no sound at all
what should I do?
Sorry for the long silence and thanks to those who responded and helped.
I've been trying to find the cause of the microphone failure for a few days now, but my knowledge of electronics is nil, so it's been a long process.
In the end, the weak link was the microphone's regular lamp - this cheap Chinese lamp psvane 12ax7 simply stopped working, despite the fact that the microphone is new and has been working for no more than a month in gentle mode.
Honestly never thought that a new lamp could stop working))))).
thanks to everyone who responded to the call for help, thank you.
Changing 2 Zener diode In psu (Z5,Z6) to 62V 1.3W will fix issue with high output and improve mics headroom significantly.ok have now change the transformer with a UTM0512 (12:1) and the output are the same.. also i have change c8, put in a mullard tube AND: replace capsule to a : rode Rode HF6 - this mic now sounds fantastic and have a very low noise, high output and smoth high frequencis..
What cap do you use for C8?ok have now change the transformer with a UTM0512 (12:1) and the output are the same.. also i have change c8, put in a mullard tube AND: replace capsule to a : rode Rode HF6 - this mic now sounds fantastic and have a very low noise, high output and smoth high frequencis..
What cap do you use for C8?
Enter your email address to join: