On 1/26/2011 1:16 PM, Joe Subich, W4TV wrote:
>> 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:
>
Looks like they won't fit the sockets for the regular GI7B either.
73
Roger (K8RI)
>>> 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
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>
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