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In the Forum: Analog Playback
In the Thread: 7788 tube mic pre design
Post Subject: Buy It Now!Posted by hagtech on: 1/14/2008
I'll buy some more 7788 and give them a try.  I'd hate to change tubes at this point.  My triode connection has pin 8 (g3) to anode, not ground).  I wonder if that makes a difference.  Also, the power supply chokes are nearby, perhaps they are putting a 60Hz or 120Hz motor vibration into the chassis, which stimulates the microphonics.  Well, off to eBay.

jh

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