[Boatanchors] Diode question

[Francesco Ledda]

I think you need to change all of them with a matched quad like HP 5082-2805. Look on Ebay.

Best, Francesco K5URG

Sent from my iPad

> On Aug 3, 2019, at 16:10, Jack Antonio <scr287 at att.net> wrote:
> 
> I'm working on a Drake T-4XB. Symptom is that
> it will only make output in X-CW, nothing in Tune
> or SSB or X-AM.
> 
> One problem found, which may or may not be the
> real problem, is an open diode in the balanced
> modulator can.  It is a 1N540, of which, of course,
> I have no spares.
> 
> Question is: Will a 1N914 or 1N4148
> (of which I have plenty be an acceptable substitute?
> I realize I may have to replace all 4.
> 
> Just wondering if there is something special about
> the 1N540 that is needed for balanced modulator service.
> 
> Thanks
> 
> Jack Antonio
> WA7DIA
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