[Amps] Testing amp with no air flow

[Ian White GM3SEK]

Rick Stealey wrote:
>I will soom be ready to apply power for the first time to a homebrew 8877
>amp.  I need to make adjustments under the chassis with the tube filament
>lit and was wondering how long I can run the 8877 with just filament voltage
>applied and no air flow?   I don't see the subject addressed in the Eimac
>spec sheet.
>
I can't answer that question directly, but how about stretching clear 
Saran wrap over the base of the chassis?

It balloons up alarmingly, but it keeps the air in, lets you see what 
you're doing, and it's no problem to poke screwdrivers and trimming 
tools through it (the small holes they make don't affect the cooling).


-- 
73 from Ian GM3SEK         'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek