2m repeater freq change
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Yong Surk Lee
Jul 12, 2010, 11:21:43 AM7/12/10
to hl9_am...@yahoogroups.com, HL SOTA
Hello;
After experimenting for a few days, it seems necessary to change the freq of the repeater
due to possible interference with a nearby UHF repeater when installed on the mountain top.
So I decided to reverse TX and RX freq.
Now, after the change, the 2m repeater, D90IK, receives 144.78 (88.5 tone required) and transmits +600 which is 145.38.
My concern was that the 3rd harmonic of the previous TX freq of 144.78 became 434.34. This is close to a nearby UHF repeater which receives 434.4 and transmits 439.4.
I and a few amateurs are working on installing electricity on top of Namhansansung mountain
and will install these repeaters soon.
de HL1FB
PS Harry, I inquired about the call sign, HL9A, and found KARL's was HL0A. So there is no
problem of duplicate callsigns.
After experimenting for a few days, it seems necessary to change the freq of the repeater
due to possible interference with a nearby UHF repeater when installed on the mountain top.
So I decided to reverse TX and RX freq.
Now, after the change, the 2m repeater, D90IK, receives 144.78 (88.5 tone required) and transmits +600 which is 145.38.
My concern was that the 3rd harmonic of the previous TX freq of 144.78 became 434.34. This is close to a nearby UHF repeater which receives 434.4 and transmits 439.4.
I and a few amateurs are working on installing electricity on top of Namhansansung mountain
and will install these repeaters soon.
de HL1FB
PS Harry, I inquired about the call sign, HL9A, and found KARL's was HL0A. So there is no
problem of duplicate callsigns.
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