[Moon] EME Status Update
Edward R Cole
kl7uw at acsalaska.net
Thu Mar 12 17:43:10 CET 2015
Recent work on 2m-eme:
I removed my secondary TR relays (HP8765A) as unnecessary for
isolation since the primary relays (NARDA) exhibit over 100-dB. This
eliminates a little loss ahead of the preamps and a potential failure
point (relays powered-on in Rx). I kept my RG-142 double-shielded
coax jumpers between TR and preamp.
2m-eme is QRV with 4x XP20 + 1300w
----------------
Work on 23cm-eme is almost finished:
new LNA enclosure installed and Rx operational. Rx/Tx isolation
tested thru the TR relay with no RF sensed by my HP432A at -20
dBm. Horizon ground temp/50-ohm termination sees 1.5-dB difference
and MAP65 sees about 24-dB audio baseline over 8-dB soundcard noise
floor. I will probably monitor the 1296 eme band with my SDR-IQ.
30w driver is installed and tested and have run the 150w amp at 120w
(so far). I will test more today to see where saturated output
falls. Couple minor ckts to hook up for monitoring in the shack (Ipa
and PS monitor LED).
I have one wheel to reinstall on the dish to make it fully functional
for azimuth movement.
I expect to have all completed by end of day. Lunar declination is
too low for eme at the moment. After high sun noise next weekend
(1900utc March 21) should be QRV 23cm with at least 120w (hoping for
more). Moon elev >10 degrees limitation due to trees.
23cm-eme: 4.9m dish (W2IMU feed) with G4DDK LNA + 120w+ CW/JT65c
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
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