OK....
10 Mhz is right on the 'border' between the 7 and 14 MHz BAND positions, so can be received on
either one. There is a chart in the receiver manual that shows which BAND switch 'should' be used
for each range. 9.5 to 10 MHz is shown on 7 MHz position, Preselector at ~ 7.5 (shown on graph on
next page), while 10 - 10.5 is shown on 14 MHz BAND, Preselector about 5.5. There is considerably
overlap in the ranges of the Preselector so for instance you 'could' set the BAND to 14 MHz and tune
9.5 - 10 MHz by setting the Preselector to about 5.
Glad you got it going!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Neil M Califano wrote:
The contacts were filthy, so I cleaned them with alcohol. I found the peak at
about 6 and I am receiving a station. Interesting, why is the peak for the 9.5
to 10 mhz band at 7.5 while the peak for 11.5 at only 6?
--- On Sat, 9/24/11, Garey Barrell<[email protected]> wrote:
From: Garey Barrell<[email protected]>
Subject: Re: New crystal not working
To: "Neil M Califano"<[email protected]>, "drakelist"<[email protected]>
Date: Saturday, September 24, 2011, 3:05 PM
Not many choices left! :-)
Are you certain you're selecting the ACCY socket it's
plugged in to?
Perhaps plug in where one of your 'working' crystals are
currently. Dirty ACCY switch contacts can
be a problem when not selected for years.
It should peak around 6 on the PreSelector.
If you have another receiver that covers 22 MHz you could
run a wire from the ext receiver antenna
to near the ACCY socket board on the back panel. If
it's oscillating, you should be able to hear it
at 22.6 MHz. The fact that the CALIBRATOR isn't
working tells me that the R-4A PreSelector is tuned
to a harmonic of the IF or PreMixer product, and the PTO
therefore has no control over the
frequency, i.e., the receiver is not 'tuneable' but
actually on a fixed frequency.
Crystals DO fail, but not very often unless physically or
electrically abused.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Neil M Califano wrote:
I's marked 22.6. The calibrator does work on the 20
meter band. It seems to peak on the 9 position which makes
no sense. Shouldn't the peak by around 7? I got the crystal
on Ebay from someone with a lot of positive feedback.
--- On Sat, 9/24/11, Garey Barrell<[email protected]>
wrote:
From: Garey Barrell<[email protected]>
Subject: Re: New crystal not working
To: "drakelist"<[email protected]>,
"Neil M Califano"<[email protected]>
Date: Saturday, September 24, 2011, 2:36 PM
OK.
What's the crystal 'marked' frequency?
Where'd it come from?? :-)
The PreSelector should peak about '6' on the
'0-10' scale.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Neil M Califano wrote:
At 14.0.
--- On Sat, 9/24/11, Garey Barrell<[email protected]>
wrote:
From: Garey Barrell<[email protected]>
Subject: Re: [Drakelist] New crystal not
working
To: "drakelist"<[email protected]>
Date: Saturday, September 24, 2011, 2:18
PM
Where is the BAND switch set?
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Neil M Califano wrote:
I tried a 11.5 to 12 mhz crystal in my
R4A and
the
radio is hearing nothing. The preselector
peaks
the static,
but at 15 meters instead of 25 and the
calibrator
does not
work. Nearby 31 meters and the ham bands
work
fine. Could it
be the crystal?
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