[R-390] R-390 Audio Transformer

[Michael OBrien]

Hi Steve
I have 1 or 2 of the RS 70v line transformers Do you remember what taps to use?
Mike



________________________________
 From: Steve Hobensack <stevehobensack at hotmail.com>
To: r390 reflector <r-390 at mailman.qth.net> 
Sent: Saturday, April 21, 2012 10:17 AM
Subject: Re: [R-390] R-390 Audio Transformer
 

An 18 volt filament transformer will do the same thing as the more expensive audio transformer. 120 to 18v is the ratio for maximum power transfer that I found experimentally.  Radio shack used to sell them. I don't know if they still do. I don't know about the frequency response though. I also compared it to a multi-tapped 70 volt line to voice coil transformer, and my ear couldn't tell the difference.
Steve N8YE


                          
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