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Good day to all,
I'm placing a request on here with the hope of picking up some spares for a tra9300 vhf set.
I'm looking for a vehicle rack module and leads, but most importantly, I'm looking for a good power supply board as the one I own has a fault with power regulation.
Many thanks, martin 2E0HV
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¿ªÔÆÌåÓýTRA3900 I think you mean.There¡¯s a capacitor that fails on the 85V supply circuit that may be the problem on yours. ?From what I remember there can be either tantalum or electrolytic caps used there, and the tantalums are time bombs - their failure mode being a short and sometimes a bit of fireworks as they expire.? I have some writeup explaining the location of this thing if you don¡¯t already know about it. ?Failing that, LR Series still has complete TRA3900 sets in great shape, though I don¡¯t believe he sells parts. . Probably because I'm outside wrestling wolves. On Oct 1, 2024, at 4:37?AM, Martin 2E0HVE via groups.io <martinsimonsohn1@...> wrote:
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Hi, thanks for the reply.
The capacitors on the power regulation board have been changed and the set switches on when fed with 12/14v anything over 14v and it refuses to fire up.
It is suposed to be powered between sort of 12/30v hence my thought about power regulation.
The 85v rail tested fine its rock solid at 85v and clean. I did find a Web site with rather alot of info on the set and this has been most helpful.
However I'm after a power supply board to pull apart and work through.
Kind regards martin 2E0HVE
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Mike