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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. |
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In Reply to: RE: First stage phono preamp transformer output coupled posted by KevinC on March 6, 2017 at 16:54:32:
Hi Kevin,
in my design 7788 is triode strapped, bias is around Va=140V, Ip=30mA, with Rp=10k to get max transconductance (50mA/V) that gives a total gain around 40 (32dB).
LCR RIAA network 600ohm is the load on secondary trasformer. With 4:1 transformer it is reflect to primary around 10k that match 7788 Rp needed.
My reasoning is that correct?
LL1692A/30mA version is in stock or is a special order version ?
What do you think about LL1660/30mA version 4.5:1 connection (100H) in my SE ?
Thanks.
Best regards.
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Follow Ups
- RE: First stage phono preamp transformer output coupled - d888sp4@gmail.com 00:27:30 03/07/17 (2)
- RE: First stage phono preamp transformer output coupled - KevinC 17:34:19 03/08/17 (1)
- RE: First stage phono preamp transformer output coupled - d888sp4@gmail.com 23:57:32 03/08/17 (0)
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