Update:
With everyone's advice I looked into what freq the transmitter was really on. I
found the crystal wafer switch off position and really thought that was my
issue, not. I also found no matter where the transceive switch was, it always
uses the injection VFO from the R-4C. Of course with the Saints game on
yesterday, I didn't spend a whole lot of time after aligning the shaft and
making a few tests.thanks all,manny- wd5bjr
-----Original Message-----
From: "Glen Kirkpatrick" <[email protected]>
Sent 9/15/2013 10:19:17 AM
To: "Manny Miyares" <[email protected]>
Subject: Re: [Drakelist] T-4XCHi Manny, You may have resolved this offline
already. I'm not exactly sure how the Drake reflector works these days after
they went to the web-based format (It's hard when you're an old guy...).
Anyway, you may have checked this, but it sounds like there could be a problem
with the port on the MFJ multiport switch that the T-4XC is connected to. Try
swapping ports with one of the other rigs and see if the problem follows the
rig or the port. What is the sequence of equipment connections? It sounds like
transmitter, switch, MN-2000, amplifier, SWR/power meter and antenna. This is
probably unrelated, but it might
be better to put the matching network between the SWR meter and antenna. The
logic is that the transmitter output pi network should have no problem matching
the amplifier input impedance, but the amplifier may or may not be able to
match the antenna impedance. If you put the MN-2000 between the amp and the
antenna, both the transmitter and amplifier are looking into 50 ohms. That way
when you switch between amplifier in-line and bypassed, nothing needs to be
retuned. Please let me know what you find. I've been running the same T-4XC
since 1978 (it was "used" when I got it). Still works! GL & 73, Glen -
W9LSFrom: Manny Miyares <[email protected]>To: [email protected] Sent:
Saturday, September 14, 2013 4:26 PMSubject: [Drakelist] T-4XCHi Guys,
I'm just back into radio this year and find myself gravitating to the older
gear. I have several "C" pieces along with an L-4B (have to have one of these).
I bought several broken and find a bad resistor or tube through most, however I
have a T-4XC that's giving be problems. I can tune up into a dummy load fine,
however on the G5RV SWR is through the roof. Keep in mind I have an MJF Multi
Port Antenna switch and have my MFJ Antenna Analyzer on a transmitter port and
switch to it to match the antenna through my MN-2000 which feeds into my amp
and meter. I can get a 1:1 match through the antenna tuner with the Analyzer,
flip to one of two radios, my TR-4C, and 4Cw and keep the low SWR. Even my
Yaesu FT-897D is happy with this configuration. When I switch to the T-4XC the
SWR jumps to 5+ to 1!!! (Yes, I've checked the patch cables) Holy Smokes
Batman!!! So into a dummy load it's happy, but when I move to a matched antenna
it goes nuts. I can't even
match the T-4XC direct using the tuner and way off where the analyzer first
tuned the antenna.Any pointers would be greatly appreciated.Thanks guys, manny-
wd5bjr
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