[Repeater-Builder] Re: Desense with Notch-type duplexers - Questions

2009-08-07 Thread tahrens301
Hi Dcflux, Yeah, I did that 1st. Actually, they now come out of the front of the box are as far apart as I can get them. Tim --- In Repeater-Builder@yahoogroups.com, DCFluX dcf...@... wrote: Cut the wire tied together TX and RX cables on the back of the quantar and seperate them as far as

Re: [Repeater-Builder] Re: Desense with Notch-type duplexers - Questions

2009-08-07 Thread DCFluX
Yeah, I understand VHF quantars or supseptable to something called 'quantar howl' which is digitally delayed desense. http://www.youtube.com/watch?v=SRfvh0UTFHw The hypnotoad also has the ability to make the same sound http://www.youtube.com/watch?v=kiVYjRbZMe0 I've never owned one so I cant

[Repeater-Builder] Re: Desense with Notch-type duplexers - Questions

2009-08-07 Thread tahrens301
I checked it into a dummy load (with one of those celwave signal insertion boxes), and didn't see any signs of desense. A friend of mine who used to work for Mot said that he had a desense problem with a VHF Quantar - Mot sent out some kind of memo that said you had to use some special kind of

Re: [Repeater-Builder] Re: Desense with Notch-type duplexers - Questions

2009-08-07 Thread DCFluX
This looks like a good article: http://www.srgclub.org/Desense_testing.html On Fri, Aug 7, 2009 at 2:42 PM, tahrens301tahr...@swtexas.net wrote: I checked it into a dummy load (with one of those celwave signal insertion boxes), and didn't see any signs of desense. A friend of mine who used

[Repeater-Builder] Re: Desense with Notch-type duplexers - Questions

2009-08-07 Thread tahrens301
Hmmm, Well, I did the signal injection into the receiver's port, as opposed to at the dummy load, and indeed, I do have desense when using the dummy load. I guess that points back to the cans how well they are performing (or not)!