[Amps] UM4001CR pin diode source - or Alpha 86 vac relay mad

[Jerry Stern]

Go to the alpha 87  ioGroups there in file section are several replacements .. arrow electronics had hundreds for about $40 each just months ago

Jerry NY2KW

Sent from my iPhone

> On Aug 7, 2020, at 7:27 AM, Chris Wilson <chris at chriswilson.tv> 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: chris at chriswilson.tv
> 
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