> I am curious however why the gent has changed the supior GI46
> heatsink with 2 from the GI7B tubes
He may not have changed the heatsink. From documentation on the
tube:
>> The tube can be supplied with no heat sink or with a heat sink of
>> variant I or with a heat sink of variant II.
>>
>> The heat sink of variant I providing more effective cooling is to
>> beused only when the tube is employed as an oscillator with a high
>> average value of anode dissipation.
What you describe a "the superior GI46 heatsink" is shown as "variant
I." sounds like "variant II" is the more common.
73,
... Joe, W4TV
On 1/26/2011 12:17 PM, Dave M wrote:
>
> 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
>
>
> ......................................................................................................
>
> 73 VE3DV , Dave
>
>
>
>
>
>> Date: Wed, 26 Jan 2011 11:38:29 -0500
>> From: alex.k2bb@gmail.com
>> To: amps@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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>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
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