[Amps] Life of tubes in ham service
s_gammons at charter.net
Thu Dec 28 18:39:09 EST 2017
On 12/28/2017 01:15 AM, Roger (K8RI) wrote:
> "I think" the GI-7B would be an easy tube to convert to transverse
> cooling to replace the no longer available Eimac tubes in the
> MLA-2500s. The coolers are easily replaced by removing a single
> screw. A lathe and mill could easily build custom radiators. It'd be a
> simple, straight forward conversion. IM products?
> 73, Roger (K8RI)
I haven't decided on the cooling method. But it will probably be
something along the lines of a plexigass cages with the fan mounted so
the air flows up around the tubes and out the holes in the top of the
cage. I've seen some use a machined piece of teflon for chimneys. A
piece of teflon tubing that size is rather pricey though.
I ask on this list about IM products awhile back and the general
consensus is it's not a problem.
Seems like the MLA-2500 is one of the many amps that others have converted.
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