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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: 5670 or 12ax7 phono posted by lugnut1 on April 17, 2015 at 11:01:33:
I can't comment authoritatively about 5670 based phono preamp designs.
From the data sheet, the 5670 looks pretty darned rugged. The amplification factor is approx. = to that of a 6922, but its gm is lower. With CCS loading, you rate to squeeze a net gain of about 40 dB. out.
Just for Ss&Gs, I've come up with a "reasonably" priced, vacuum rectified, B+ PSU, which yields the 300 or so VDC needed to go into regulation down to the 250 VDC the tweaked RCA setup needs. It's a case of already owning 117Z6 rectifiers and wanting to use them. Call me Mr. Voltage-Doubler. ;>D
Eli D.
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- RE: 5670 or 12ax7 phono - Eli Duttman 13:31:12 04/17/15 (0)
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