[Amps] GI-46B in TL-922

[Dave M]

The conversion of comercial amps to the russian triode is fairly well documented on the net ,there a few extras that need to be addressed like a new bias board and the additition of a 12.6v @5A filament transformer and of course cooling...... I am curious however why the gent has changed the supior GI46 heatsink with 2 from the GI7B tubes , this makes absolutly no sense to me 


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73     VE3DV , Dave



 

> Date: Wed, 26 Jan 2011 11:38:29 -0500
> From: alex.k2bb at gmail.com
> To: amps at contesting.com
> Subject: [Amps] GI-46B in TL-922
> 
> Hello everybody,
> I have a TL-922 amplifier and one of 3-500 tubes died - it is widely open
> now.
> Another one is still good and amp produces 400-500W out.
> 
> Friend of mine gave me a link to youtube video with a slide show of TL-922
> converted to work with Russian GI-46B tubes.
> His point was that the tubes are much cheaper than 3-500's...
> 
> Here are the videos:
> http://www.youtube.com/watch?v=FbNgQT_k80s
> http://www.youtube.com/watch?v=_J7nlw9If1Q
> 
> What do you think of it?
> Is it something "even a caveman can do" or "forget about it"?
> 
> One thing concerns me - none of those conversion use anode blower, they rely
> on original TL922's fan.
> I also was not able to find any schematic for the conversion itself, only
> the videos...
> 
> thanks,
> Alex K2BB
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