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Old 3rd Jan 2012, 12:36 am   #15
mrmagnetophon
Retired Dormant Member
 
Join Date: Sep 2010
Location: Ohio, USA.
Posts: 757
Default Re: AKG C60 valve mic

I meant in terms of quality if that schematic looked like a fairly well put together one.
I read however that there were quite a few problems with this microphone schematic, even in the golden years of its usage.
I did something odd, came up with the idea to inject a cd player output into the microphone transformer, run it just like the valve output, (with the mic off) and what did i hear? less of a bass roar, but now a 80 hertz, maybe 60 hertz, hum!
I inject the signal after the massive 180M resistor and it sounds fine, a little hot sounding, but alright.

Anyone have an idea?

-Chris
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