True, BUT the book says 110 and 85 (I think) at the antenna port. What I'm getting at is that it may NOT have been right (122.5) from the start.
Maire-Radios wrote: > > > *well if it was 85 watts with 122.5 watts* > *it would be lower at 110 watts and any be the 71 watts do the > math should be about the same values.* > ** > *John* > ** > > > ----- Original Message ----- > *From:* n2acf <mailto:[email protected]> > *To:* [email protected] > <mailto:[email protected]> > *Sent:* Friday, May 08, 2009 2:49 PM > *Subject:* [Repeater-Builder] First UHF MSF5000 Attempt > > Hello All, > > Attempted to tune up the TX side of a C74CXB today. The odds > weren't really in my favor as I've never worked on a UHF MSF nor > have I ever used a tracking generator. I brought the station to a > friends shop and I used an IFR1200S for the tuning. > > I checked the station before I began and on 453.900 there was 82.5 > watts at the antenna port and 122.5 coming out of the PA. So, I > reprogrammed the station, adjusted the VCO, and then began to > re-tune the 3 pole and 4 pole filter. I also changed the output > power of the PA to 110 watts because I believe that is what the > station is rated for. The new TX frequency is 441.950. > > When I was done with both filters, I checked the power at the > antenna port and it's only 71 watts. I believe it's supposed to be > 85. > > The PA looks very clean on the spectrum analyzer and the carrier > is right on frequency. Again, I'm not the best at reading the > scope while using the tracking generator but I did it the best I > could for the first time. Is my output power OK at 71 watts or is > something wrong? > > Thanks in advanced! > > Adam N2ACF > > > > >
