Go to the alpha 87 ioGroups there in file section are several replacements ..
arrow electronics had hundreds for about $40 each just months ago
Sent from my iPhone
> On Aug 7, 2020, at 7:27 AM, Chris Wilson <email@example.com> wrote:
> 07/08/2020 12:07
> I have an Alpha 86 here with suspected TX / RX switching pin diode
> failure. The amps TUNE function is suspect, and switching between
> standby and operate gives a vey attenuated RX signal in standby mode.
> In TX it seems to operate, TUNE display aside, normally.
> The manual's schematic shows them as stud mounted UM4001CR devices. I
> am unable to source these, does anyone know of a current source for
> them please? Alternatively does anyone have instructions for
> conversion to using two vac relays? Fast CW is not required, and the
> noise of the vac relays not really a concern. Thanks.
> Best Regards,
> Chris Wilson.
> mailto: firstname.lastname@example.org
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