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In the Forum: Analog Playback
In the Thread: 7788 tube mic pre design
Post Subject: Re: 7788 - love the tube!Posted by rafaroxlm on: 2/15/2006
Thanks for the comments Romy. Would appreciate pointing out where the schematic is for the 7788 phono preamp or even better your friend´s 7788 mic preamp schematic. I can use the phono stage circuit minus the RIAA as a starter and then play with the grid voltage as needed.
Jim H. The 7788 as a first tube in a mic pre either triode wired or pentode wired offers some theoretical advantages considering the high Gm....the remarkable closeness of the grid to the cathode should give very fine control. Theoretically more so than twin triodes although yes the UHF may need to be cut off.
At any rate it would be worth trying as a possible significant improvement.
Rgds
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