Pultec amp questions
« on: July 28, 2004, 01:39:09 PM »
Hi all,

I've been thinking about following my pultec filter with an API 325 card, and I have a couple of questions:

I have one API card with a Jensen JT-11P-1 10K:10K transformer on it. Would that be better to use than a card without an input transformer?

Will the filter section be happy working into the API card's impedance?

How much gain should I set the card for? Should I measure the insertion loss of the filter and set the API to make up for that amount?


The definition of insanity: "Hey, this thing could be really cool - if I had the money to fix it up, which I don't, but if I did it could be really cool - if I had the time, which I don't, but


Pultec amp questions
« Reply #1 on: July 28, 2004, 02:45:57 PM »
I think that Jakob have some answers about that! Think you'll need around 20dB make-up gain! In Jakobs version the schematics says 10K prim for the make-up input, Sowters transformer is a 2,5k!
Thomas "TK" Kristiansson
"The Sound Is In The Iron"
www.vintagedesign.se  www.tkaudio.se


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