[Amps] GS-35b heat sink

[Ian White GM3SEK]

Carl wrote:
>> The sand-cast anode coolers on the GS31 and GI7 can't be very efficient
>> either, because of the small number of fins. One option might be to
>> replace these with US-style coolers salvaged from dead 8877s and
>> 3CX800s. It should be possible to shrink fit a solid copper plug inside
>> of the cooler, with a fixing hole through the centre and a turned flange
>> to mate onto the Russian tube.  (Just an idea; I haven't tried it.)
>
>Ive done that using glass base 4X150 coolers on 8072's as they were 
>just soldered in place and removed with a propane torch. I havent been 
>successful in removing 8122 coolers and I do have several dead 8930, 
>3CX800, and 7213's. How do you remove those coolers?
>
With a 4CX250B, I first removed the lower part by carefully cracking the 
ceramic insulator in a large vice. The anode cooler can then be tidied 
up by sawing off the unwanted parts at top and bottom, leaving a plain 
cylinder with fins on the outside.  Not having a lathe at the time, 
that's as far as I ever got with the experiment.



-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek