In Reply to: I've read that the 12B4A is amazing posted by Cousin Billy on February 15, 2016 at 01:26:13:
I don't off hand know the specs of the 12B4, but I think it was used as a driver tube in some of the revered Marantz amplifiers, 8B and/or 9. It also may be used in early HK Citation tube amplifiers. This suggests it has a relatively low output impedance when used as a driver, which is also good for an OTL. Believe me, JF was a pragmatist. If he used the tube early on, it's because he could get them, and notice that he paralleled ten of them to get something like 10 or 30W (I forget which). Later, when because of TV the power beam tubes like 6LF6 came around, he switched to them probably because more bang (power) for the buck.
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Follow Ups
- RE: I've read that the 12B4A is amazing - Lew 11:16:48 02/15/16 (23)
- RE: I've read that the 12B4A is amazing - AJ 12:47:50 02/15/16 (22)
- Thanks for the correction,.. - Lew 15:10:12 02/15/16 (21)
- RE: Thanks for the correction,.. - AJ 16:04:44 02/15/16 (16)
- Beveridge? - Lew 16:40:49 02/15/16 (15)
- RE: Beveridge? - AJ 17:10:11 02/15/16 (14)
- A question about your Model 3s - Lew 12:37:44 02/16/16 (3)
- RE: A question about your Model 3s - AJ 13:31:43 02/16/16 (2)
- Fair point about "hijacking"... - Lew 14:11:15 02/16/16 (1)
- RE: Fair point about "hijacking"... - AJ 18:57:35 02/16/16 (0)
- RE: Beveridge? - Lew 10:02:45 02/16/16 (9)
- RE: Beveridge? - airheadair 09:37:46 02/17/16 (8)
- RE: Beveridge? - AJ 10:09:37 02/17/16 (7)
- RE: Beveridge? - Lew 10:10:33 02/19/16 (4)
- RE: Beveridge? - airheadair 23:25:27 02/19/16 (1)
- RE: Beveridge? - Lew 12:00:48 02/20/16 (0)
- RE: Beveridge? - AJ 16:21:41 02/19/16 (1)
- RE: Beveridge? - Lew 22:29:05 02/19/16 (0)
- RE: Beveridge? - airheadair 10:26:07 02/17/16 (1)
- RE: Beveridge? - AJ 10:48:56 02/17/16 (0)
- RE: Thanks for the correction,.. - AJ 16:04:19 02/15/16 (3)
- RE: Thanks for the correction,.. - 6bq5 11:18:33 02/26/16 (1)
- RE: Thanks for the correction,.. - AJ 01:54:26 02/27/16 (0)
- Holy cow!!! - Lew 16:44:23 02/15/16 (0)