[Lowfer] WC2XSR/13 status today.

[Ralph Hartwell]

The transmitter was shut down between 1519 - 1820 CST today for
modifications to the antenna tuning system.

The modulation is QRSS30, sending "XSR" one time, followed by CD ID at
10 WPM, then the entire sequence repeats. The transmitter power output
to the antenna is 400 watts. The carrier frequency remains at 164.500 KC
for the present time.

The 10 position loading coil tap switch was removed and a motor-driven 3
position tap switch was installed in its place. This will allow
operation on 166.5 KC for transmitting, and on 185 KC for LOWFER
reception, plus a spare tap for future use, possibly in the MF band,
should that particular frequency allocation be restored to WC2XSR.

About two weeks ago, I installed a motor-driven servo system to remotely
adjust the variometer coil from the operating position. Although the
electronics for the automatic tuning function is incomplete, manual
operation is available, and lets me quickly adjust the variometer when
the weather changes and causes detuning of the antenna system.

Also in the future - I have most of the necessary parts, but have not
started assembly yet - is a remotely controlled adjustable impedance
matching system to adjust the match of the coax line to the antenna
system as conditions change. This, in conjunction with the servo
controlled variometer, will allow a more constant loading on the
transmitter as well as a more constant radiated power from the antenna
under most environmental conditions.

73,

Ralph   W5JGV / WC2XSR / 13

The current On-The-Air status of WC2XSR/13 is available at:
http://home.att.net/~shmrg/wc2xsr-13_log.htm

My 600 Meter Research Group files are at:
http://home.att.net/~shmrg

My Home Page is at:
http://home.att.net/~ralph.hartwell
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