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 | Spring Update: Round #3 a Success! |
 Another successful trip to the hill was completed Saturday (April 22nd, 2006)!
Thanks this time to Jeff - N1SNR, the following items were completed in this trip:
6 meter radio and antenna: Antenna analysis of the 6 meter Ringo showed that the antenna is tuned properly. VSWR was flat on 52.540 MHz. The crystals for transmit and receive all needed fine tuning, but were not very far off. It was noted that the receiver works very well in the 52 MHz range but is a little numb in the 53 MHz range. Output power of the 6 meter radio was found to be 118 watts.
Control link radio: Power output of 26 watts was noted. Link radio yagi has a flat VSWR. Transmit frequency was found to be off by 350 Hz and was corrected. The receiver was not checked due to a technical problem but has been working just fine.
Repeater receiver and exciter: The repeater receiver was checked and found to have a sensitivity of 0.39uV without the preamp (GE specs show a sensitivity of around 0.35uV). A fine tuning of the receiver components was attempted to increase the sensitivity but was unsuccessful. The sensitivity of the receiver with the preamp added in line was 0.14uV. The transmitter was found to be off frequency by 1 KHz. This was corrected and the transmitter is back on frequency. The main repeater antenna has a VSWR of approx 1.5:1 with a measured power output of 98 watts.
Duplexers: It was noted that approx 1dB of transmitter desense was present in the repeater receiver so a fine tuning of the cans was in order. After the fine tuning was complete, no desense was found and a slight increase in measured repeater power out was noted.
Additional EQ work was done on the audio of the 6 meter radio and the control link radio.
More improvements are on the way including the addition of a folded 6 meter dipole on the tower with new feedline and the addition of a link to the 53.05 machine in Litchfield.
Stay tuned!
73 de Keith - N1FTE
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