[AMPS] 3-500z repair question

[measures]

>> >
>> >I know this has been covered in the past, but I can't remember, or find
>the
>> >answer to my question.
>> >
>> >I have a 3-500z that has the solder melted in the pins of the heater
>> >element. It came from a poorly designed (LK500A) amplifier that doesn't
>have
>> >adequate cooling in the socket area. The filaments don't light up. In the
>> >past this has happened and I simply re-melted the solder in the filament
>> >pins and this fixed the problem. This time it didn't work and the
>filaments
>> >don't light up. Is there any special technique that a
>"home-owner/civilian"
>> >can perform to get this tube back to health?
>> >
>> 1.  plug tube into an unoccupied shoe, anode down.
>> 2.  remove the pin assembly with a rapidly moving propane torch.
>> 3.  remove all tin-lead solder with solder-wick.
>> 4.  paint all of the surfaces that need to be soldered with rosin flux.
>> 5. tin with 6% AG / 94% Sn silver solder and resolder.  Add solder as
>> needed.
>> 6.  remove solder flux residue with everclear or denatured ethanol.
>> --  note - do not mix tin/lead solder with silver solder.
>> cheers, Bill
>>
>> -  Rich..., 805.386.3734, www.vcnet.com/measures.
>> end
>
>I Want to thanks Rich for the instructions on how to re-solder the filament
>pins in my 3-500Z tube. 

ur welcome

>It worked like a champ.

good news. 
>
>I was ready to give up on this group with the latest mud-slinging and
>bickering, ..

Ad hominems are usually a sign that your opponent's arguments are about 
to cave in.  

cheers

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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