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I am just about ready to install these and just had a question or 2.
My use of this unit is for phase splitting to a KT88 PP amp. In the 1:1 configuration there is no gain in the signal. If i use 1 : 2 config does that mean i will have a net gain of 2 for the signal? I ask because the amp i will be making has "lowish" sensitivity and a boost in the signal would be beneficial. And if i use the boosted gain will there be a degradation of the overall sound quality of the amp?
2. On the output of this transformer there are 4 connections + , - , CT, and Gnd. I am planning to hook up one channel to +, one channel to - . And Gnd to ground. For my use as a phase splitter is there a connection that i need to make for the CT? thanx in advance, Dak
Edits: 06/29/16Follow Ups:
If you use 1:2 where the secondary has a center-tap and the two winding ends are each connected to a tube grid in differential or dual SE configuration, the gain between the two grids is 2. If the driving impedance for the LL1544A is relatively low ( <1Kohm), There will be little or no degradation.
The Gnd pad is for the transformer shield and case connection and should be connected to audio ground (not critical where). The CT (center-tap) should be connected to the same ground as the cathode bias resistors for the first stage triodes, assuming there are grounded cathode bias resistors.
Kevin Carter
K&K Audio
www.kandkaudio.com
Hi, Kev, I am planning to use my preamp to drive the amp it is a tubed preamp with 6sn7 tubes. I was originally, going to use the 1:1 config for 6sn7 driver tube on the amp. But now i am going to use a 6sl7 driver tube on the amp and was wondering if the 1:2 would be better or worse with that tube. I did not realize that the transformer could be configured for different gain levels. So, using the IT at higher gain levels does incur some loss of driver signal quality?
One last question, is it ok to jumper the Gnd to the CT and then to the amp ground bus at the bias resistors? regards, Dak
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