Chicago BO-14 100w amp - Page 2

lugnut · 24th August 2011, 10:05 PM

lugnut · 24th August 2011, 11:19 PM

Bandersnatch · 25th August 2011, 10:42 AM

Quote:

Originally Posted by HollowState

I'm not sure if I have the artical you're refering to or not. I have so many papers and magazine articals stuffed in a file cabinet draw that I haven't looked at in years. I do remember an artical in one of the vintage magazines I have a tall stack of that used the BO-14 with PP 6BG6s. I think it's a "Radio & TV News" from the late 50's or early 60's. But if you have the artical, post it or send it to me through the forum. I'd enjoy seeing it.

Victor

Victor,
Send me an email and I'll send you *AN* article on a BO-14 design. It is a few pages of pdf's and uses the iron line up mentioned in this thread.

I have a pair of these too, and a set of the HV power trans-es and chokes. Not sure I'll do it as written; no need for a 100W amp. Lower B+ for Class A operation is much more appealing...

cheers,
Douglas

lugnut · 26th August 2011, 06:55 PM

I did some checking and the amps are wired in triode mode. Power supply is choke input. Still have more to do before running them. Wish I had more time and energy!

lugnut · 15th October 2011, 05:37 PM

I'm thinking of rebuilding this bunch of iron to the original Ken Olson specs, probably as a triode amp. Also considering using a board like Pete Millet's 5687. Any advantages to other input stages or is the original best?

24th August 2011, 10:05 PM	#11
lugnut diyAudio Member Join Date: Aug 2011 Location: Austin TX	BO-14 pics MVC-001F.JPG MVC-002F.JPG

24th August 2011, 11:19 PM	#12
lugnut diyAudio Member Join Date: Aug 2011 Location: Austin TX	BO-14 pic MVC-001F.JPG

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26th August 2011, 06:55 PM	#14
lugnut diyAudio Member Join Date: Aug 2011 Location: Austin TX	I did some checking and the amps are wired in triode mode. Power supply is choke input. Still have more to do before running them. Wish I had more time and energy!

15th October 2011, 05:37 PM	#15
lugnut diyAudio Member Join Date: Aug 2011 Location: Austin TX	I'm thinking of rebuilding this bunch of iron to the original Ken Olson specs, probably as a triode amp. Also considering using a board like Pete Millet's 5687. Any advantages to other input stages or is the original best?

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