What would be the best OPT for a 12b4a in a single-ended line stage? LL1660? The 12b4 has a mu of 6.5, a plate resistance of 1030 ohms and the plate current is around 30ma. If anyone has tried 12b4 in a OPT line stage I’d love to know how they went about it and what they thought of it.
Thanks
Follow Ups:
- Re: 12b4 single-ended opt - KevinC 12:00:58 11/01/04
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- In Reply to: 12b4 single-ended opt posted by Klangvold on October 31, 2004 at 20:04:59:
I'd be tempted to try the 12B4 with an LL1660/18mA or /25mA connected for 2.25:1. This will give you essentially 0dB gain and avout 250 ohms output impedance.
Kevin Carter
K&K Audio
www.kandkaudio.com
- Check with Gary Kaufmann - Ed Sawyer 09:32:30 11/01/04
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- In Reply to: 12b4 single-ended opt posted by Klangvold on October 31, 2004 at 20:04:59:
He has a nice 12B4 linestage he built. Pretty cool, sounds good too. Finding quiet 12B4s can be tricky though.
-Ed
- Re: Check with Gary Kaufmann - Klangvold 14:27:53 11/01/04
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- In Reply to: Check with Gary Kaufmann posted by Ed Sawyer on November 01, 2004 at 09:32:30:
Thanks for getting me started. I’ll see if I can get in touch with Gary Kaufmann and try to find two good tubes.
- Re: Check with Gary Kaufmann - Klangvold 14:27:53 11/01/04
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