Steve,
If I put the 500 Hz filter in the 250 Hz position, I don't see the
attenuation, but if I put the 250 Hz filter in the 500 Hz position, I see
attenuation. To me, that pretty much indicates the problem is in the filter.
73,
Mark
----- Original Message -----
From: "Steve N4LQ" <n4lq@iglou.com>
To: <tentec@contesting.com>
Sent: Sunday, July 25, 2004 8:58 PM
Subject: Re: [TenTec] Orion Roofing Filters
> Then to determine if the problem is the radio or the filter, I would
remove
> the filter and stick a .01mfd capacitor across the two hot pin holes,
engage
> the filter and see if you still get that 20db of attenuation. If you do,
> then the rig is broken if not, then something very strange is wrong with
> that filter. Maybe a crack somewhere else.
>
> Steve N4LQ
> ----- Original Message -----
> From: "Mark Erbaugh" <mark@microenh.com>
> To: <tentec@contesting.com>
> Sent: Sunday, July 25, 2004 7:17 PM
> Subject: Re: [TenTec] Orion Roofing Filters
>
>
> > Steve,
> >
> > Thanks. I looked at the connections carefully under a lighted magnifier
> and
> > could see no cracks. I went ahead and re-soldered all four pins, just in
> > case. Unfortunately, that didn't help. I'm still seeing about 20 dB
more
> > attenuation going through the 250 Hz filter than through the 500 Hz
> filter.
> >
> > 73,
> > Mark
> >
> > ----- Original Message -----
> > From: "Steve N4LQ" <n4lq@iglou.com>
> > To: <tentec@contesting.com>
> > Sent: Sunday, July 25, 2004 4:21 PM
> > Subject: Re: [TenTec] Orion Roofing Filters
> >
> >
> > > Yes. Sometimes stress on the pins will cause the foil to crack around
> > them.
> > >
> > > Steve N4LQ
> > > ----- Original Message -----
> > > From: "Mark Erbaugh" <mark@microenh.com>
> > > To: <tentec@contesting.com>
> > > Sent: Sunday, July 25, 2004 4:03 PM
> > > Subject: Re: [TenTec] Orion Roofing Filters
> > >
> > >
> > > > Thanks, I'll take a look. Are you referring to the pins that mount
the
> > > > filter into the radio?
> > > >
> > > > 73,
> > > > Mark
> > > >
> > > > ----- Original Message -----
> > > > From: "Steve N4LQ" <n4lq@iglou.com>
> > > > To: <tentec@contesting.com>
> > > > Sent: Sunday, July 25, 2004 3:51 PM
> > > > Subject: Re: [TenTec] Orion Roofing Filters
> > > >
> > > >
> > > > > Look for a hair-line crack in the foil around the pins of the
> filter.
> > > > > Happens all the time! Just a dab of solder will fix it.
> > > > >
> > > > > Steve N4LQ
> > > > > ----- Original Message -----
> > > > > From: "Mark Erbaugh" <mark@microenh.com>
> > > > > To: <tentec@contesting.com>
> > > > > Sent: Sunday, July 25, 2004 3:53 PM
> > > > > Subject: Re: [TenTec] Orion Roofing Filters
> > > > >
> > > > >
> > > > > > I have swapped the 250 and 500 Hz filters and the problem seems
to
> > > > follow
> > > > > > the 250 Hz filter, so it looks like that is the culprit. Do you
> > know
> > > if
> > > > > > these filters can be repaired? Does TT repair them? It doesn't
> look
> > > like
> > > > > > there is much to them, just the crystals and a few capacitors.
> > > > > >
> > > > > > On a related question. I put the 250 Hz filter in my Orion only
> > > because
> > > > I
> > > > > > had one available. If the filter can't be repaired, is it worth
> > > buying
> > > > a
> > > > > > replacement? Has anyone encountered a situation where the 250 Hz
> > > filter
> > > > > > improved reception over the 500 Hz filter?
> > > > > >
> > > > > > 73,
> > > > > > Mark
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Lee A Crocker" <lee_crocker@yahoo.com>
> > > > > > To: <tentec@contesting.com>
> > > > > > Sent: Saturday, July 24, 2004 1:52 PM
> > > > > > Subject: [TenTec] Orion Roofing Filters
> > > > > >
> > > > > >
> > > > > > > Mark
> > > > > > >
> > > > > > > why don't you switch the 500 and 250 and see if the
> > > > > > > loss behavior changes to the 500hz position. This
> > > > > > > would, I believe, virtually diagnose a bad 250hz
> > > > > > > filter
> > > > > > >
> > > > > > > Lee W9OY
> > > > > > > _______________________________________________
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> > > > > > >
> > > > > >
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