Greetings from over the Pond, oddly I have had a R4C stored in a damp area, and
years later when I fired up it still works..though I have only run it short
periods. The 2nd R4C is rather deaf both with normal rx and with the xtal
calibrater..if its not the valve and I have both 6ej7 and the uk
Gary -
KE9PQ has feet! Yes, the serial numbers are sequential and there are three versions of the 'B' that
set data points. WB4HFN has a 'Serial Number Database' on his site for most Drake gear.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service
Guillermo -
I tried to send you a direct message last night, but was refused by your ISP. Do you have another
address that will work?
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
GGLL wrote:
Hello Garey, my
Guillermo -
Actually the 0B2 was a 'downgrade' that was only used in the first 1000 (s/n 7000 - 7999). It was
holdover from the R-4A which still had a tube based CALIBRATOR that needed the 'regulated' +150
VDC. Starting with the R-4B, the CAL circuit was changed to an FET with RTL dividers
Hi Ian,
There is no risk performing the all band TX mod on the TR7 and it is
an easy way to get the WARC bands using the UP-DOWN buttons. I used that
method before I installed the AUX7 module.
Regarding the AGC. Do you want something faster than the current FAST
setting via the front panel AGC
On Tue, 27 Sep 2011 07:41:03 -0400, ian parkinson wrote:
I saw a Mod for the TR 7 which involves cutting some pcb tracks for all band
tx option..it certainly would be great to operate on the 30 metre WARC band.
Any thoughts over this mod is it too risky ??
The only real risk, per se, is that
Is an antenna matcher a balun or unun since it matches the antenna to the input
impedance?
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- Original Message -
From: Neil M Califano cchange...@yahoo.com
To: Drakelist@zerobeat.net
Sent: Tuesday, September 27, 2011 3:30 PM
Subject: [Drakelist] A liitle off, but...
Is an antenna matcher a balun or unun since it matches the
antenna to the input impedance?
I'm not sure
Is an antenna matcher a balun or unun since it matches the antenna to the input
impedance?
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Is subject rcvr. equivalent electronically to the SW2? I need a manual and
schematic. tnx.Gordy___
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Yes, it really is as easy as it says on Garey's B-Line CD.
The old grease was pretty dried out - I cleaned all the metal parts with brake
cleaner, used Rem Oil for the thin shaft and moly grease for the cam, larger
shaft and bearing surfaces. The moly grease is very low-viscosity compared to
It looks in the schematic as though there's plenty of resistance in series with
the mic input. I'm willing to use PTT only and the easiest way (and least
degrading to the low-level audio signal from the mic) is to jumper one of the
NC contacts in the PTT switch that goes to GND over to the
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