Chuck -
First ... It is normal for the gain of the receiver and transmitter to
vary slightly with the position of the transceive switch.
That said, the basic fact is that the INJection and the CARrier
OSCillator signals are what is patched between the two units. The CAR
OSC signal is at
I'm trying to determine what my TR4C, RV4C, and AC4C is worth. Yea I know
what the market will bear however I don't want to give it away and need to
feed my family.
I intend to list them on Craigslist instead of PAY-BAY so any help would
be wonderful. They are in great condition and look very
Chuck -
First ... It is normal for the gain of the receiver and transmitter to
vary slightly with the position of the transceive switch.
That said, the basic fact is that the INJection and the CARrier
OSCillator signals are what is patched between the two units. The CAR
OSC signal is at
I recently acquired my first tube radio station. A TR-4/RV-4/AC-4.
Everything seems to work as it should. My question is one only a rookie
would ask, and I'm sorry to ask but I have looked everywhere I can find,
without any luck.
Should the AC-4 have rubber feet on it? Mine does not and when
Ok. Thanks all. I did not know the AC-4 was securely mounted to the
chassis of the RV-4 with screws. I was just sliding it in there. I see I
have the threaded type mount power supply. I also see that the feet on
the RV-4 are nutted. So I'll try to screw the RV-4's rear feet into the
bottom of
Dave - I have no knowledge of the R7 board and don't have the schematic for
that, but did recently do some work on my TR7 digital control board and will
tell you what I found.
Excuse me if I go over some stuff you already know. U201 is simply a BCD to
Decimal decoder. On the TR7, two
Hi
My R-4A project is puzzling
me. It sounds ok, but when I
go through the adjustment
procedure I'm puzzled. The
book says thet the tuning of
T7 andT10 is quite broad. For
sure, I can't get a maximum at
all. And the notch will not
work. There is absolutely no
response to any setting of the
Not sure that will work, if memory servers, they may be different
threads. The original screw in feet of the AC-4 (shorter than the RV-4
feet, they were just half-rubber balls attached to screws) were to be
used to hold the AC-4 in the RV-4/RV-4C/MS-4 cases.
Loren - WA3WZR
On 1/15/2010
Karl -
Three things. One, the IF must be aligned properly, i.e., on frequency.
Two, NOTCH is VERY narrow. It's easy to go right past it if you turn the
knob too fast. Three, the NOTCH ADJUST control on the right side of the
chassis must be adjusted as well. These two must be adjusted
The TR-4 has 6 rubber feet (sorta). On the rear there is one in each
corner and in the front there are two stacked in each corner. This
raises the front to an angle. The RV-4 has rubber feet in both corners
up front that look very similar to the ones on the TR-4. And in the rear
corners there
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