[Test-Equipment]

[Tod-ID]

While we are on this topic, if someone has an 8555B that they KNOW has only
a fried mixer but works OK otherwise and they want to sell it they could
email me direct with their price requirement.

tod at k0to.us


Tod
  

> -----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 11:12 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.
> 
> 
> Tod K0TO
> 
> 
> 
> 
> > -----Original Message-----
> > From: test-equipment-bounces at mailman.qth.net
> > [mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of Chris 
> > Trask
> > Sent: Wednesday, November 02, 2005 7:49 AM
> > To: Tod-ID; 'John'; test-equipment at mailman.qth.net
> > Subject: Re: [Test-Equipment] wtd Faulty HP8555 mixer
> > 
> >     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
> > 
> >      ,----------------------.       High Performance Mixers and
> >     /    What's all this     \    Amplifiers for RF Communications
> >    / extinct stuff, anyhow?  /
> >    \  _______,--------------'           Chris Trask / N7ZWY
> >   _ |/                                  Principal Engineer
> >  oo\                                  Sonoran Radio Research
> > (__)\       _                             P.O. Box 25240
> >   \  \    .'  `.                     Tempe, Arizona 85285-5240
> >    \  \  /      \
> >     \  '"        \                 IEEE Senior Member #40274515
> >      .       (  ) \
> >       '-| )__| :.  \              Email: christrask at earthlink.net
> >         | |  | | \  '.       
> http://www.home.earthlink.net/~christrask
> >        c__; c__;  '-..'>.__
> > 
> >                        Graphics by Loek Frederiks
> > 
> > ----- Original Message -----
> > From: "Tod-ID" <tod at k0to.us>
> > To: "'John'" <morters at global.freeserve.co.uk>; 
> > <test-equipment at mailman.qth.net>
> > Sent: Wednesday, November 02, 2005 7:27 AM
> > Subject: RE: [Test-Equipment] wtd Faulty HP8555 mixer
> > 
> > 
> > > I have discussed this with an acquaintance who does such
> > repair (not
> > > an HP employee now). He stated that the easy way to open
> > the module is
> > > to remove the module and them place it on a heat controlled
> > hot plate. 
> > > Gradually
> > bring
> > > the temperatur up so that the entire module is warmed to the same 
> > > temperature. When you reach a particular themperature the
> > lid will be
> > > "easily" removed. [I do not remember the exact temperature
> > he said was
> > > necessary, but could ask him if required].
> > >
> > > I did not discuss whether or not replacement of the actual
> > diode was
> > > 'challenging' nor whether exact replacements were required or 
> > > alternate diodes were satisfactory.
> > >
> > >
> > > Tod K0TO
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: test-equipment-bounces at mailman.qth.net
> > > > [mailto:test-equipment-bounces at mailman.qth.net] On 
> Behalf Of John
> > > > Sent: Wednesday, November 02, 2005 6:49 AM
> > > > To: test-equipment at mailman.qth.net
> > > > Subject: [Test-Equipment] wtd Faulty HP8555 mixer
> > > >
> > > > Does anyone have a faulty yes faulty mixer from an 
> HP8555 laying 
> > > > about they don't want?  I'm interested in finding one to
> > open up and
> > > > take a look at.
> > > >
> > > > Thanks,
> > > > John G3UGY
> > > >
> > > >
> > > > _______________________________________________
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