[Repeater-Builder] Re: E F Johnson CR600

2007-02-02 Thread skipp025
EFJ stuff is pretty much all good. Some of it is easy to work on and convert to amateur radio use. The sad part is how EFJ was sold to a big corp and the operations moved to Texas where they now only seem to sell and support P-25 radio stuff. In short they kind of left the conventional land

Re: [Repeater-Builder] Re: E F Johnson CR600

2007-02-02 Thread Jim B.
skipp025 wrote: I have a few repeaters made from EF Johnson Challenger Mobiles put back to back and they work pretty well. cheers, skipp I guess the rx microphonics problem isn't much of an issue as a repeater rx ;c) More of a problem with noisy trucks... -- Jim Barbour WD8CHL

Re: [GE Mastr II] Re: [Repeater-Builder] New article on Channel Element/ICOM stability - W3KKC

2007-02-02 Thread Nate Duehr
On 2/2/07, Kevin Custer [EMAIL PROTECTED] wrote: The article isn't intended to educate about the use of GE MASTR II ICOM's in specific, or what stability one would achieve when the crystal is correctly compensated. For that information, one would go to these Ok Kevin, you got me there. I

[Repeater-Builder] VHF duplexer FS.

2007-02-02 Thread Steve
For sale, Tx-Rx model 28-41-05 Vari-Notch pseudo-pass, notch duplexer. This is the appx two RU duplexer for wide split repeaters, currently on 151.6375tx, 154.5275rx. Comprised of five of the two inch square cavities. Tx-Rx manual says 2.5 mhz spacing. Tag says Tx 1.5 dB insertion for 76 dB

Re: [GE Mastr II] Re: [Repeater-Builder] New article on Channel Element/ICOM stability - W3KKC

2007-02-02 Thread Kevin Custer
Nate Duehr wrote: On 2/2/07, Kevin Custer [EMAIL PROTECTED] wrote: The article isn't intended to educate about the use of GE MASTR II ICOM's in specific, or what stability one would achieve when the crystal is correctly compensated. For that information, one would go to these Ok

[Repeater-Builder] Re: E F Johnson Challenger Repeater

2007-02-02 Thread skipp025
Microphonics hasn't been a problem for the repeaters we've made up. I would have never messed with two back to back Challengers except someone gave me the repeater already made up and another guy gave me a stack of radios. Then I'm guilty of buying more of them off ebay because they were

[Repeater-Builder] Re: Commercial Trunking repeater

2007-02-02 Thread skipp025
Hi Bob, The sad part is that no current low cost digital delay will easily ramp back to zero time delay while in operation. An analog delay could be ramped back to zero in operation to reduce the delay after each new tx. But alas no repeater mfgr is making cheap analog delays anymore...

Re: [Repeater-Builder] Re: Commercial Trunking repeater

2007-02-02 Thread Steve Smith
Skip, Interesting you bring up that idea. I've had success with an initial CTCSS induced audio delay, ramped back to zero, using the PT2399 controlled by a DS1803. I use it in the MP100 controllers on a multi hop link system. Talking from one end of the system to the other result is no