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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
|
I’m planning a phono stage, 2 stages, with 600R LCR RIAA equalization.
The first tube will be D3a, triode strapped, transformer loaded, transformed into the 600R LCR.
An experienced tubes amps designer recommended the LL1692A/18mA, yet I wonder. With D3a ‘trioded’ plate resistance of 1.9K and 1692A in 3.5:1 ratio, the 600R LCR will be reflected to 2.1K load to the tube, which seems too low.
Is there a more suitable transformer for that purpose?While I’m at it, I have a general question concerning Lundahl interstage transformers.
I read somewhere that Lundahl can adjust the air gap in some transformers to enable higher current through the primary than the shelf transformers are rated.
Is it correct?
If yes, what is the estimated price difference for what may be a special order?
Also, if yes, is there a penalty in some other parameters when the gap is changed?
Edits: 12/05/13
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Topic - Interstage transformer to 600R recommendation needed - Joshua_G 12:59:51 12/05/13 (14)
- RE: Interstage transformer to 600R recommendation needed - KevinC 12:44:24 12/06/13 (8)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 13:37:02 12/06/13 (7)
- RE: Interstage transformer to 600R recommendation needed - KevinC 15:44:11 12/06/13 (6)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 10:35:47 12/07/13 (3)
- RE: Interstage transformer to 600R recommendation needed - KevinC 16:51:06 12/08/13 (2)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 04:11:49 12/09/13 (1)
- RE: Interstage transformer to 600R recommendation needed - KevinC 04:26:48 12/09/13 (0)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 16:34:45 12/06/13 (1)
- RE: Interstage transformer to 600R recommendation needed - KevinC 05:45:43 12/07/13 (0)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 14:57:50 12/05/13 (4)
- RE: Interstage transformer to 600R recommendation needed - KevinC 12:56:01 12/06/13 (3)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 13:56:58 12/06/13 (2)
- RE: Interstage transformer to 600R recommendation needed - KevinC 15:56:10 12/06/13 (1)
- RE: Interstage transformer to 600R recommendation needed - Joshua_G 16:36:22 12/06/13 (0)
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