From: Eric Webner 
Subject: Re: [drakelist] T4XC and R4C transceive alignment


Eric Webner  made an utterence to the drakelist gang
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Hi David and Drakelist,
 
I am new to the drakelist, having gotten serious about using a T-4XC/R-4C
that I got several years ago. I just got the transmitter off the bench; it
needed a lot of wafer switch cleaning and a good alignment.
 
In response to David's inquiry, when using the receiver or transmitter PTO,
I understand that you still have to peak the preselector on the receiver,
and tune up the rf tune control on the transmitter, no matter which PTO (s)
you are using.
 
That's a bit of a pain, if you are used to a transceiver as I am (Kenwood
TS-520). It had a single control that served as preselector and tuned the
driver circuits.
 
I hope that helps. Let us know if that clears things up (like mud!).
 
73,
 
Eric KA8FAN


David Austin  wrote:

"David Austin" made an utterence to the drakelist gang
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Hi all,

I have the above set-up. When set up for transceive operation using 
either the TX or RX VFO (i.e. anything but "separate" mode) I find 
that the position of the Preselect/RF Tune control on the "master" rig 
(be it R4C or T4XC) has to be set differently for either max power out 
or best receive "peaking". It seems particularly poor on 21MHz and 
28MHz band i.e. when set for best RX performance it is way off peak 
for TX with hardly any power out at all. When set for max power, the 
RX is way off peak and "deaf". Ideally obviously the preselector/RF 
Tune control should require no or very little adjustment for peak 
performance on both TX and RX. Is it just a case of going thru an 
alignment procedure on both the TX and RX or is there more to it than 
that? Operation in split (separate) mode is just fine, as you would 
expect from the above description.

Any ideas?

Thanks,

David G4GTP

P.S. Slightly off topic.....Worked quite a few stateside this morning 
at about 0900 UTC on our (UK) newly available extended 7MHz band, just 
available today (extra 100KHz to take us to 7.200). Would not normally 
expect to hear USA at all on 7MHz at this time of day. Is it 
exceptional condx or is it just that USA is usually masked under all 
the Euro QRM in the bottom 100KHz of the band! Do you US guys hear 
Europe/G stations reliably at about the same time normally on 40 
meters? Anyway, quite a treat and all on the Drakes of course! 

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Hi David and Drakelist,
 
I am new to the drakelist, having gotten serious about using a
T-4XC/R-4C that I got several years ago. I just got the transmitter off the
bench; it needed a lot of wafer switch cleaning and a good
alignment.
 
In response to David's inquiry, when using the receiver or
transmitter PTO, I understand that you still have to peak the preselector
on the receiver, and tune up the rf tune control on the transmitter, no
matter which PTO (s) you are using.
 
That's a bit of a pain, if you are used to a transceiver as I am
(Kenwood TS-520). It had a single control that served as preselector and
tuned the driver circuits.

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