VHF

Repeater RR4NA
Is officially put into effect September, 16, 1998, works at R5 channel (in 145.125 MHZ and out 145.725 MHZ ).
For what it needed?
If effective of Your radio stations sufficiently for the opening receiver RR4NA noiseblanker that You "be carry" on the roof of Vyatka State University (str.Moscow, 36) and radiate 5 rarefied watt through collinear 2х5/8 vertical antenna . So this on notions of Internet - your provider.
What's range?
In the absence of the tropospheric passing - 30...100 km, depending on equipments of distant correspondent.
Who uses RR4NA?
More than 70 Kirov and county radioamateurs
But that from itself present RR4NA?
RR4NA equipment view
Construction of RR4NA
At all, this home brew design, was partly use radiostation FM301-106S. RX- sensitivity 0.1 mkV under s+n/n 12dB, dynamic range on intermodulations 3-d order better 85dB ( blender - diode double balanced, power a heterodyne - 0.5 Wtts, two RF cascades on КТ939А with the current 50мA, two T-filters on spiral resonators ). TX - FM transmitter, quartz stabilization, output power 5...15 W, state of working under 10W round-the-clock. Duplex filter contains: 8 quoterwave resonators by the diameter 100 mms and wave resistance 60 Ohm. Three resonators are rejected filter of transmitter, three - a receiver, and two last are rejected filter of receiver. Rejection -86dB ( 29dB per resonator), fading less then 1.5 dB.
Do You want to hear RR4NA?	Enter here<RR4NA.wav>

Kirov county, Murashi	QTH LOC LO49JJ
Beacon UA4NX/a (ex UK4NAF,UZ4NWF ) - VHF transmitter, work at 144,199 MHZ with CW mode and transmitting certain information (tropo signal).
Power 5 watts,antenna 9 elements F9FT install on 45 metre masts, state of working round-the-clock.
Purpose - a determination of radioauroras <reference to aurora.html>.
Beacon been doing by UA4NDX and was installed November 5, 1981 .
But here is so UA4NX/a heard through aurora ( reflection from north shining ). But this like "auroral" beacon in Sweden (SK4MPI).