173.28.169.173
Hello! Been lurking around here forever!
I've built the S.E.X. amp (w/ shorting jack and soon-to-be C4S boards) and a Seduction (w/C4S boards also being installed this week) during this past year. With an AT120E cartridge and .5 meter interconnect to the input of the S.E.X. amp, the Seduction's gain is rather low for my tastes, and I suspect that the extra 2-3dB gain from the better loading from the C4S boards will only help a little bit. I may build a Foreplay, but not in the near future (due to cost). In the meantime, I was thinking of sticking a little board in the Seduction to raise the gain prior to sending the output to the S.E.X. One idea would be something like these: http://diyaudioprojects.com/Tubes/6418-Tube-Preamp-Headphone-Kit/, which use tiny, 6418 sub-mini twin triodes for voltage gain and op-amps as output buffers. The current draw on the little board I've linked to is only about 12mA! Does the Seduction's power trans have enough headroom on the heater taps (6.3V) to rig in either a voltage regulator or some sort of bridge rectifier/voltage doubler type of arrangement to get 9VDC/20mA? And not effect the filaments on the 6922s? Or a I better off not bothering and just sticking to a 9V battery?
Thanks in advance - I'll be interested to see what these little boards can do once they arrive. Probably would make a good iPod headphone amp....
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