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Old 4th Nov 2006, 10:29 pm   #1
Skywave
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Cool BIG AF amplifiers!

Adi -

As we know you just love big valve amps, you may care to take a look at these . . . . .

http://www.crowthornetubes.com/cv57amp.htm

http://www.crowthornetubes.com/13e1amp.htm

http://www.crowthornetubes.com/ty81amp.htm

Real beauts, eh? That last one is just amazing!


Al / G8DLH
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Old 4th Nov 2006, 10:33 pm   #2
evingar
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Default Re: BIG AF amplifiers!

Yes amazing indeed
Good to see Gerry has found a use for some of those surplus 'scope tubes
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Old 4th Nov 2006, 11:48 pm   #3
30sradio
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Default Re: BIG AF amplifiers!

I've seen these in the flesh; when collecting bottles from Gerry.
Very impressive.
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Old 6th Nov 2006, 8:11 pm   #4
PWH
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Default Re: BIG AF amplifiers!

Here is a prototype OTL I made earlier out of some Russian 6C33C-B's

2Hz -50KHz +/- 0 Db

I didn't make the Dynatron in the background
Attached Files
File Type: pdf otl.pdf (85.5 KB, 169 views)
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Old 7th Nov 2006, 2:18 am   #5
Skywave
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Question Re: BIG AF amplifiers!

Quote:
Originally Posted by PWH View Post
Here is a prototype OTL I made earlier out of some Russian 6C33C-B's
What does the abbr. "OTL" stand for, please?

Al.
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Old 7th Nov 2006, 8:17 am   #6
PWH
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Default Re: BIG AF amplifiers!

Output Transformer-Less
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Old 7th Nov 2006, 8:40 am   #7
John M0GLN
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Default Re: BIG AF amplifiers!

Quote:
Originally Posted by G8DLH View Post
The close up of the TY81 is this link reminds me of the John Cleese, Ronnie Barker and Ronnie Corbett sketch.

John
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Old 17th Dec 2006, 11:34 pm   #8
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Default Re: BIG AF amplifiers!

There were some Russians at the Genova fair today selling TY81s for 20 Euros each. They only had one wierd (abortianate) looking socket though.
It was hard but I resisted, now I'm starting to regret not getting a couple of them.
Mike
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