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 Post subject: Output Transformer
PostPosted: Fri Dec 27, 2013 9:51 am 
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Hi, I'm building a Princeton 5F2A type circuit and have a question about the output transformer. I have a Hammond 1760E which has an 8K ohm CT primary and 4, 8 and 16 ohm secondary taps. Should I use the full 8K primary or just the CT. Also what will this mean to the secondary taps? Thanks for any info.

Dave.


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 Post subject: Re: Output Transformer
PostPosted: Fri Dec 27, 2013 12:39 pm 
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Unfortunately that transformer won't work. You have a OT designed for a push-pull amp while you need a OT transformer designed for a single ended (SE) amp.

Your current OT is designed for very little net current through it (the two sides of push-pull amps have opposing current which essentially sums to null). If you use that OT it won't be able to handle the output current and it will burn up in a nasty way.

Good news is a replacement OT for your amp is both cheap and plentiful.

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 Post subject: Re: Output Transformer
PostPosted: Fri Dec 27, 2013 2:03 pm 
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Thanks for the reply, not really what I wanted to hear. Can you make any suggestions, I'm kind of new to this.


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 Post subject: Re: Output Transformer
PostPosted: Fri Dec 27, 2013 2:35 pm 
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Check www.tubesandmore.com for a placement.

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 Post subject: Re: Output Transformer
PostPosted: Fri Dec 27, 2013 4:03 pm 
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Thanks, kurtlives.


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