Steve,
The 2.4 filter plugs into the back....as does the 1.5, .5 or whatever
you want in those slots. The 2.4's are pretty available.
There is a front end filter and I think it is 8khz on the chassis.
I'm going from memory here...whaich may be ok. most of the time....-:)
73,
Lee
-----Original Message-----
From: Steve Wedge <[email protected]>
To: Drake List <[email protected]>
Sent: Tue, Jan 31, 2012 7:11 pm
Subject: [Drakelist] R-4C 2.4 filter bad?
I haven't dug into this receiver yet, but it seems to me that the 2.4
kHz SSB filter is bad. R-4C, late serial number.
* Using the S-meter, the signal strength of the calibrator is lower in
2.4 by 10 dB, than the reading in both 1.5 and .5.
* The decrease in gain is solid and not intermittent. Rocking the MODE
switch doesn't reveal any changes.
* It's also a noticeable loss listening on-the-air.
I see what appears to be the filter on the top side of the chassis,
under where the two carrier oscillator crystals are. Has anyone had
any grounding issues with this filter that have fixed a similar
problem? I figure if there's a bad ground, it could affect the
insertion loss of this filter.
If it's bad, then comes the pain of finding a replacement. If anyone
has an extra one for sale, let me know.
Steve Wedge, W1ES/4
Live free or die: Death is not the worst of evils.
John Stark.
All my computers have my signature with various pearls of wisdom
appended thereto.
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