And the obvious advantage of having a PL requirement on the repeater on one end or the other is that they don't lock up and time out.
A friend recently fired up a newly coordinated repeater and found that it had a 'honk' during the PL run-down period and was badly de-sensed. Turned out the other repeater was an un-coordinated back-yard upside down system linked to an intertie. The problem was quickly corrected when the un-coordinated repeater owner was notified, but caused some concern until it was realized what was going on. Years ago an upside down repeater in New Mexico on the intertie using PL access would regularly be de-sensed by one in Texas 300 miles away in the spring with the enhanced propagation. This one was finally cured when the Texas repeater used a PL to access. Rarely were both systems active at the same time. 73 - Jim W5ZIT -----Original Message----- From: [EMAIL PROTECTED] To: [email protected] Sent: Sat, 24 Feb 2007 1:01 AM Subject: Re: [Repeater-Builder] 440-450 band plan (The normal North vs So Cal :-) At 10:20 PM 02/23/07, you wrote: >PL is no cure for interference or desence, it just hides it until >someone actually tries to use the repeater. > > > Yep. All the more reason to require PL'd inputs and make sure that > > systems don't have compatible PL tones with the one on the reverse... I never said it was - in fact I've made that point several times on various pages on the repeater-builder web site. But if you have two systems that normally can't hear each other, but once in a while a band opening allows it, then you have to assume that the coordinators did the best job that the could given the environment. The system owners shouldn't be running a carrier squelch system, or if they are, have PL decoders installed that can be enabled. One of the local carrier squelch systems have an 82.5 decoder, and the club newsletter plainly says something like "Our club repeater is carrier squelch on (frequency), however circumstances may require a 82.5 tone. We suggest that you program your radio for full time 82.5 encode." My prior statement was made from the assumption that both were established and coordinated systems. I said that if they are going to be there, that they can at least NOT have the output tone of one be the input tone of the other. Mike WA6ILQ ________________________________________________________________________ Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
