开云体育

I remember receiving several factory tuned Q-2330 duplexers from Sinc. and seeing exactly what you describe when viewing the RL. I called and spoke to an engineer and was told that what I was seeing

Right or wrong, I have a M1225 programmed for the frequencies. I use it for the final notch tuning. I just keep turning down the signal from the service monitor and tune until it goes away and then

I would like to have had that one. I'm sure someone grabbed it and paid a little less for it. Mick - W7CAT

I’m looking for the connector to go on the back or the whole cable kit for a dc backup on a quantar. Does anyone here have anything they would be willing to part with? I can’t find anything

Harold, I know you're right there. I didn't want to do this with so many connections. I liked the harness the duplexer came with. I was told/advised it was just not the right length being the duplexer

I saw a used Agilent 8753d with all the goodies in it (6ghz and tdr) sitting on the grass at Dayton this year for $850. I commented to him that it should be respected more and put on a table….. ?:)

There are also a lot of RF connections being made with all those T connectors as opposed to a one piece crimped and soldered together harness. In commercial and public safety systems, a 3dB

Mick, I've wondered the same thing. I started off with a Lite VNA 64. It was regarded as the best small handheld inexpensive VNA at the time of purchase a few years ago. It was only about $150. It's

The older bulkhead barrel connectors that had glass and hermetically sealed had intermod generating material in the pass through so that temperature changes didn’t break the glass. Try a different

I never testing the one I have, but have wondered how close many of them may be. Mick - W7CAT

Harold, I will give that method a try with taking the tee out of the antenna port. Then using different dummy loads. The picture below is the main dummy load I've been using for reference (TX/RX). The

The tiny VNAs are pretty accurate in frequency- at least the ones I’ve used and if they are off 5khz, it wouldn’t affect it much.

Charles, Yes it's 23+ (on each side tx/rx) of return loss with all the cans tied together. Individual cavity tuning, I was seeing between 26/27db of RL.

Still available... Chris -- Chris Baldwin, CETSr. (KF6AJM) Trustee - MetroNET Cal. Intertie (KB3PX)

Charles, the return loss isn’t really important on the rx side. 10 to 14 dB is fine and won’t affect system performance to any noticeable degree. The return loss on the rx side does not increase

Slightly different yet related subject, I've never tested any of the little VNAs, but have always wondered how close they are to being on frequency??? Mick - W7CAT

Considering the relative obscurity of these machines, you might try reaching out to Midland directly, and see if you can speak with Roger French. I think he's about the only person in the US that

Take the T out of the antenna port of the duplexer and put dummy loads at those ports to see if there is any desense. That would remove and question of coupling between the cans some how. Then if

Yes, 23 db is a good RL, but are all three cans tied together, after individually measuring RL. The connecting cables may change the total RL when connected to a 50 ohm load. Sometimes, they can be

Harold, Thanks for sharing your insights. I appreciate that. I do see 3 humps in the return loss when the cans are all hooked together. It's always kinds bugged me, but I was told it's normal by