[Test-Equipment] wtd Faulty HP8555 mixer

[John Miles]

Another person to check with is Luis Cupido, CT1DMK, email cupido (at)
mail.ua.pt.  He's done some work on repairing/upgrading the 21 GHz mixers
from Tek 490 analyzers, and I believe he's mentioned working on YIGs as
well.  Very knowledgeable fellow, from what I've seen.

-- john, KE5FX

> -----Original Message-----
> From: test-equipment-bounces at mailman.qth.net
> [mailto:test-equipment-bounces at mailman.qth.net]On Behalf Of Tod-ID
> Sent: Wednesday, November 02, 2005 10:12 AM
> To: 'Chris Trask'; 'John'; test-equipment at mailman.qth.net
> Subject: RE: [Test-Equipment] wtd Faulty HP8555 mixer
>
>
> I will ask the fellow if he minds me passing along his name and email
> address.  He only does this type of repair in the Winter. He lives in
> Minnesota and Winters are long and Summers are short so he does not waste
> any "summertime". I know that he has at least three of the 8555 mixer
> modules and at least one 8554 mixer module that he is planning to repair
> once Winter starts.
>
> >     Could you let us know who this person is who does these
> > repairs?  I have a pair of HP8554B's where the YIG oscillator
> > has failed and I'm told that they are repairable as it's
> > usually a wire to the output amplifier.
> >
> > Chris
>