Good detective work! At this point,might want to just buy a good working
mobile cheap and swap the boards. Never had much luck changing just one
output transistor,it always seems to come back and bite you! BTDT,and I
avoid those charity jobs.73,Lee
[EMAIL PROTECTED] wrote:
> Eric and Lee, >Re VHF amp failure.
> Thank you both for your fine suggestions. Almost fixed. The junction
> between the PA and output filter board was broken. This was repaired.
> The Astron bench supply does crowbar at 80 RF watts output at 19 amps,
> (too high) Running the RF amp at 70 watts produces one hot and one
> cold output transistor. All high power joints were resoldered, hoping
> it was an expansion crack. Zipp. PA transistor on right side is cold.
> The number is ACRIAN 4387P1 842141467. I know it should be a matched
> pair but at this point I might take a chance. Anyone have a beatup amp
> for parts or a replacement transistor they would be willing to sell
> me? Man I hate charity jobs. They always cost me money. You guys ever
> notice that or is it just me?
> Thank you gentlemen,
> Gary K2UQ
>
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>
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