Happy New Year!
Take the tops of and they fit into 1RU but that's gotta be one of the worst production mistakes.Ciao,jb
Just while on the subject of that long ago group buy, that tnc apex460 style mic ended up being quite a good mic, after reworking the circuit, tube and capsule. I think that came out at around 450usd.I use that mic into one acmp81 feeding a diy la2a and it remains probably my best/most comprehensive mic chain.Again, that led to a huge amount of learning as well as lots more time in focussed listening to the mic - indeed mics in general.So, there is definately a 'happy ending' for at least some of the tnc stuff.
clean rack and work , like the wood spacers !
I'll NEVER look at anything from Gina with trust again .
From my research some options areBC184 = BC550 or MPSA18BC214 =BC560BC441=2N3053ABC461=2N2905A
So I've replaced Q4 & Q5 with 2N2905A & 2N3053 but I still have hum mainly around 80-90 Hz when the EQ is engaged. I've attached an audio clip below. There's some pops so please turn down your monitors
I wasn't able to find the 2N3053A which has a higher voltage rating than the 2N3053. Is it possible that this is the problem?
Nice to see this thread active again.Didn't see the attachment.I saw 40V & up for the '3053, that should be fine for this circuit (IIRC it does +24V, correct ?)