The simple answer is yes, you should be able to transceive either way with any
of the 4 separates.
The receiver should have only a volt or so of Premixer signal at the INJ jack, the MAIN TUNING
fiducial should be lit and the receiver should work with no cables!!
The transmitter INJ should be the same, except in XMTR control there should be a few volts of -DC
(-30? don't recall for certain,) along with the Premixer signal coming out of the INJ. This is the
voltage that cuts off the Premixer tube in the receiver and may or may not turn off the R-4B fiducial!
The TRANSCEIVE switch in the transmitter disables the Premixer signal in the transmitter with hard
switch contacts in the RCVR position so there is no need for a control voltage from the receiver.
So if it doesn't transceiver EITHER way with the INJ cable installed, I gotta think the INJ
connector is miswired at one end or the other, almost certainly in the R-4B.
The CD should help in figuring out what's missing!! Don't forget that the photos can be blown up at
least 600% to see 'up close'.. :-)
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>
Steve Wedge wrote:
Either. The only way I've been able to go with this pair is separate. There could be some broken
stuff in the receiver - I haven't opened it up yet.
The CD came today and gets two thumbs-up! I'm still reading through all the
information!
Steve Wedge, W1ES/4
"I can't complain, but sometimes I still do."
- Joe Walsh
If the above message appears, it came from Steve's Son of Laptop!
----- Original Message ----- From: "Garey Barrell" <[email protected]>
To: "Steve Wedge" <[email protected]>
Cc: <[email protected]>
Sent: Saturday, August 20, 2011 5:42 PM
Subject: Re: [Drakelist] R-4B/T-4X Transcieve - not!
Which way are you trying to go??
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>
Steve Wedge wrote:
I'm assuming I should be able to operate an R-4B with a T-4X transmitter and be able to use
either VFO.
I haven't pulled the covers off my recently-acquired R-4B but do notice that the PO replaced all
the RCA connectors on the rear. I have the correct INJ cable and it works fine with my R-4A and
the same T-4X.
What voltages should I see at the INJ jack of the R-4B? I'm assuming there's a low-level RF
signal with a negative bias. True?
Steve Wedge, W1ES/4
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