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Post subject: Re: Primary Impedance of Super Twin Output Transformer
Posted: Wed Jan 04, 2017 1:06 pm
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Joined: Thu Dec 15, 2016 12:16 pm
Posts: 9
Thank you Tims Audio and BMW2002Ti:

This amp is without the reverb section so no 6C10's needed.

I have not measured the idle current for each of the 6L6's yet. I will don this after I get some other items done.

I'm going to go through the amp using 2 mv test test signal next to compare the levels with those shown on the schematic.

Also, I do have a tube tester (an EICO 667) and the 7025 pre-amp looks very weak so I'm going to repalce it before I do any more work on it.

Maybe next week I'll get back to it. For now I'm happy the AOT looks good. Hope this also helps some others working on these guys. AOT primary impedance is 1700 ohms or so.

Thanks for all your help. When I do more, I'll post it on this forum.

CE


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Post subject: Re: Primary Impedance of Super Twin Output Transformer
Posted: Wed Jan 04, 2017 4:13 pm
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Joined: Wed Mar 31, 2010 12:48 am
Posts: 26416
Location: Tombstone Territory
Newdyne wrote:
......and the 7025 pre-amp looks very weak so I'm going to repalce it before I do any more work on it.


The 7025's are scarce and getting scarcer but any quality 12AX7 or 5751 with a spiral-wound heater element will work satisfactorily.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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