Re: Blown final club? I think I have a membership
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Hi Jeff.? I am very curious.? Have you done the reverse phase mod there in the final RF stage?? Had you checked and set the bias carefully?? I have been out of this loop for years, but I had one of the first run when finals were blowing and a few of us saw some design problems with the phase or the input to the final board.? I did all of that and have not had a failure (I am not claiming that my mod fixed any problem, but curious about others who DID do the mod and whether the finals released the blue smoke).?
My 817 still happy, only a few other repairs needed in the many years I've used her.? She is not used a whole lot these days, but I imagine I'll want to stock replacement PA transistors myself.?
Did Yaesu ever release a service bulletin on this?? I know that the 817ND made some changes, just not sure what those were.
Hadassah WA3JPG
On first blush, that appears to be an excessively high mortality
rate. Any thoughts on "the why" of it all?
On 8/5/24 16:29, Ron Wright via
wrote:
I am on
my 3rd PA board for my FT817non-ND I bought around 2004.
-- Hadassah Freyja Sobel, J.D., Ph.D. Arroyo Grande, CA.
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