[AMRadio] Audio Driver Transformer advice

[b.gaz at comcast.net]

I was not clear, any 5000 to 10,000 ohm center tapped to 8 ohms (output transformer). 


----- Original Message -----

From: "b gaz" <b.gaz at comcast.net> 
To: "Paul Baldock" <paul at paulbaldock.com> 
Cc: amradio at mailman.qth.net 
Sent: Monday, December 29, 2014 8:20:40 PM 
Subject: Re: [AMRadio] Audio Driver Transformer advice 

Any push pull audio output transformer will work. 
5000 ohms center tapped to 10,000 ohms will likely work fine. 
It would be better to get some extra power rating, like 35 watts. 
Hammond makes them, UTC used to make good ones (LS series), etc. 

Brett 
N2dts 


----- Original Message ----- 

From: "Paul Baldock" <paul at paulbaldock.com> 
To: amradio at mailman.qth.net 
Sent: Monday, December 29, 2014 6:59:34 PM 
Subject: [AMRadio] Audio Driver Transformer advice 


I'm building a modulator with 2 x 813's in pushpull (strapped as 
triodes) driven by a 20W Solid State audio amplifier. I need a driver 
transformer to go between the 813 grids and the 20W amp. The 20W amp 
can drive about 20V peak to peak. I think I need about 200V peak to 
peak for the 813's, so a 10:1 turns ratio ratio would be about right. 
So based on that an audio transformer designed to go from 600Ohms 
center tapped to 4 or 8 ohms would probably do the job. Have I got 
the math right? Does something like this exist? 

Thanks 

Paul 






--- 
This email has been checked for viruses by Avast antivirus software. 
http://www.avast.com 

______________________________________________________________ 
Our Main Website: http://www.amfone.net 
AMRadio mailing list 
Archives: http://mailman.qth.net/pipermail/amradio/ 
List Rules (must read!): http://w5ami.net/amradiofaq.html 
List Home: http://mailman.qth.net/mailman/listinfo/amradio 
Post: AMRadio at mailman.qth.net 
To unsubscribe, send an email to amradio-request at mailman.qth.net with 
the word unsubscribe in the message body. 

This list hosted by: http://www.qsl.net 
Please help support this email list: http://www.qsl.net/donate.html 

______________________________________________________________ 
Our Main Website: http://www.amfone.net 
AMRadio mailing list 
Archives: http://mailman.qth.net/pipermail/amradio/ 
List Rules (must read!): http://w5ami.net/amradiofaq.html 
List Home: http://mailman.qth.net/mailman/listinfo/amradio 
Post: AMRadio at mailman.qth.net 
To unsubscribe, send an email to amradio-request at mailman.qth.net with 
the word unsubscribe in the message body. 

This list hosted by: http://www.qsl.net 
Please help support this email list: http://www.qsl.net/donate.html