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SR3P - FM repeater
First attempts to build a FM repeater have been evidenced to take
place in June of 1981 when the Provincial Department of the Polish
Ham Radio Association in Poznan applied to the Administration of
the Polish Ham Radio Association and to the National Radioinspection
Service for adequate permissions. However, in that periode of time
this kind of things turned out to be impossible.
Only after the colleagues from Ogrodzieniec (SR9E - the first Polish
FM repeater) succeeded in getting such a permission, the willingness
of having an own repeater in Poznan revived.
After almost one year lasting pertractations with the relevant
authorities the permission was granted at the beginning of December
of 1986. It was a third permission in Poland, but the second
permanent one (SR5E in Warsaw had a temporary permission).
Straight off the repaeter was mounted and set going on December 30, 1986.
Soon there occured problems caused by low temperatures at the location,
but they were directly fixed by placing the whole equipment in a
thermoresistive environment.
From January of 1987 till now the repeater has been working with hardly any
maintenance activities (only antennas replacement and slight corrections
of duplexer filters could be mentioned).
Some technical characteristics:
| Callsign: | SR3P |
| WW-Locator | JO82LK |
| QTH-Locator | IM45e |
| Channels: | R2 / 145.050 - 145.650 |
| Antennas: | loacted 130 m asl, vertically polarized |
| Antennas gain: | about 9 dBi |
| Output power: | 3 W |
| Treshold sensitivity: | 0.13uV |
| Useful sensitivity: | 0.20uV for SINAD 20 dB |
| Acoustic band: | 270 Hz-3.1 kHz / 3dB |
| Deviation linearity: | less than or equal 4 kHz (3%) |
| Max. deviation: | less than or equal 5 kHz |
| Receiver bandwidth: | +/- 7,5 kHz |
| noise and parasitical frequencies unmeasureable: | (-60 dB) |
(based on the original measurements record (June '87)
| Location: | Ham Radio Club SP3KKU (Poznań-Winogrady) |
| Director: | SP3GCL Marek Mazurkiewicz |
| Designer and the main constructor: | SP3INJ Mariusz Parysek |
| Other constructors: | colleagues from Poznan: SP3AAI, SP3AFO, SP3BGO, SP3BJC, SP3CGA, SP3CSC, SP3DQS, SP3FKY, SP3GCL, SP3GUL, SP3HWO, SP3INJ, SP3JBV, SP3JCG, SP3JIE, SP3JMZ, SP3LRR, SP3LRZ, SP3LYM, SP3MIS, SP3NK, SP3OEA, SP3OED, SP3PL, SP3RAX, SP3RNJ, and others |
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