w7nikw7nik wrote: > I had to tune the 1st band pass and the second band pass. I did not know > about the metal soldered cover that needs removed to allow tunning. I have > about 019 watts on a 1 watt scale out the exciter . > Thanks for the info .
This may seem obvious - but realize that the exciter in a UHF Micor Station runs at VHF. If you have a frequency sensitive RF meter, make sure you are looking for RF power at 1/3 your operating frequency. If you are having trouble getting 400 mW or so on your new frequency, take another element in the commercial VHF band and re-tune the exciter to make sure it is (still?) working correctly. The exciter makes 400 mW at 1/3 the transmitter operating frequency, then there are filters - which also operate at VHF, then is the tripler which makes about 1 - 2 watts at UHF. All stages should be re-tuned to insure PA saturation, otherwise the transmitter will be spurious. Hope this helps... Kevin Custer
