If the output power is set too high, the station will make a short pulse of output power, then just stop transmitting with a fault/failure indication (maybe it will beep but I wasn't listening at the time).
I suppose you could tweak the last coil in the pre-filter, but I suspect something else is causing that to have an effect. Maybe your original tuning was off by that amount. Another thing I did once was to use a precision 50 ohm dummy load (one with a real good return loss) at the other end of the section I was tuning (the end NOT connected to the signal generator). This gave me better results, so I think the impedance of the PA or IPA might not be exactly 50 ohms. Tweaking the appropriate coil after-the-fact would be recommended after tuning it in this fashion. Bob M. ====== --- Jay Urish <[EMAIL PROTECTED]> wrote: > Do this: > Turn down your PO. If you have it cranked up it can > go into foldback and > act like its acting now. > > What I did on mine is turn the power down and put > the bird meter with a > dummy load on it on the output on the side of the > cabinet.. I then keyed > the repeater and turned out the power till it folded > back.. I then > turned it down and peaked the final slug in the > preselector for maximum > smoke. It only took 1/8 turn if even that... The I > ran the power up to > max and found another 23 watts. > > > n9lv wrote: > > First, can someone tell me in the F/D tuning of > the MSF5000, they say > > to adjust for a dip in the RF Millivolt meter, > which I can get, and > > then says to go a half turn past that, on the dip, > does it go to the > > bottom of the dip and remain there, or where > should it come back up > > to. This is very unclear to me. > > > > My problem is, I'm still getting double beeps from > the repeater, > > stating that there is a mismatch with the PA. I > can manually key the > > transmitter with the xmit switch on the repeater, > get about 55 watts > > out, but the repeater will not key up. The > controller is keying he PA > > exciter, just not the amplifier stage. > > > > Mathew __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
