If I might add my 2 cents here-I have now narrow banded a number of Mastr II receivers, all high band, using the kit from Com Specs, it works Great HOWEVER, the receivers all have a problem with the squelch threshold and there is a lot of popping going on-setting the squelch tighter does no good-the issue seems to be that the noise settings for the Mastr II-we have tried many different fixes including adding a Mot. Squelch, and adjusting the "hidden" magic pot-to no avail-even sitting on the bench with no signal applied they are very noisy-and while the sensitivity measures about the same as before, the performance is not.
Andy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025 Sent: Tuesday, November 17, 2009 12:00 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Early FM Repeaters (tubes and more) > What's sad is how much will likely go in the dumpster > instead into some deserving ham's hands ;c} Or made available on/to the surplus market. > Actually, there is still a legal question as to > whether equipment that was not type-accepted for > narrow-band originally will still be legal if the > transmitter is narrow-banded, ie, deviation turned > down. The FCC has yet to clarify much of anything > like that. A big can of worms and there seems to be a lot of people on many groups who live to post various FCC rules along with their interpretations. Bores me to tears to try and read the legalese these folks spout. Some key points if I may... The narrow band physical mod is to the receiver. The transmitter is not a mod, but typically a standard deviation and audio level adjustment. It is the responsibility of the License Holder to ensure the emissions are legal. I personally have been told by more than one FCC Field Agent and a former Office Chief... (still working at the FCC in a higher capacity) they are not going to get excited about properly upgraded equipment properly running within the limits of the license requirements. The above has proven to be the case the few times I've had site interactions with the FCC. I've never seen a Field Agent walking around with a type acceptance list or computer doing said look-ups. s.
