Re: Quintron Corporation / Glenayre 70cm pager transmitter & Power Supply. Need info.
¿ªÔÆÌåÓýYes, this series (QT6700??) were bad about intermod even with a
good band pass band reject on them. I ended up figuring it was
mixing in the exciter. It could come in if there was any spot on
the cover that was not making perfect RF seal (they never did) or
even coming in on the leads coming into the back of the
transmitter if it was strong enough. The pins on the board that
held the channel elements would corrode and bad about causing
intermod problems. If you are only using the PA, you should have a lot fewer problems. I might still have a spare PC somewhere in the junk. Also a quiet site without all of the IMTS, paging, and other constant on high power stations will be a great help!
On 11/1/2022 9:05 AM, Burt K6OQK wrote:
I may be wrong here, but I recall a lot of problems on Mt. Wilson, and other sites, to broadcast 940 MHz STL's as well as VHF radios from Quintron paging transmitters.? As I recall, it was when drive was removed from them that they would oscillate in the final stage.? The cure was to remove the amplifier's voltage when they were supposed to be off rather than leaving the amplifiers powered up and simply removing drive. |
Don Clark