As long as you turn the modulation down to 2.5kc dev max, that meets the "narrowband" requirements. The only reason for changing the I.F. filters is to re-gain the amount of "recovered" audio out the speaker that you had before. Or you can just turn up the volume on the receiver. If you cahnge the filters, it does help with adjacent channel interference if someone is close to you in freq.
Mike ----- Original Message ----- From: [email protected] To: [email protected] Sent: Saturday, January 17, 2009 3:50 PM Subject: Re: [Repeater-Builder] Re: Are you ready for narrowbanding? Hello Group, Isn't it true that the radio must be on the "List" of type excepted units? I have a brochure for the Midland syn1 radio that says it is capable of the 12.5 kHz splits and "Narrow" dev. (2.5kHz). I was told that the Syn1 was NOT on the list of type excepted radios. What about the Moto HT-1000? Have heard that some of the later serial numbers were narrow band accepted. Is there a list from NTIA or ???? that tells which radios are going to be "Legal" to use on narrow band fxs? I guess just because you can change the I.F. filters, and knock down the deviation, some rigs just won't fly. 73's de Tim W7TRH Wa. -------------- Original message -------------- From: "Chuck Kelsey" <[email protected]> They are. I am one that says there won't be a huge flood of radios hitting the surplus market. Everything sold in the past 10 (or more) years has been narrow band capable right out of the box. Chuck WB2EDV ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Saturday, January 17, 2009 1:26 AM Subject: Re: [Repeater-Builder] Re: Are you ready for narrowbanding? > At 1/16/2009 13:38, you wrote: >>I absolutely do. There's a TON of non-narrowbandable equipment in use, >>and we're not just talking about Micor/MastrII vintage equipment. >>Maxtacs, MSF's, even early Quantars and MastrIII's. Pretty much anything >>made before, I think, 1996-ish. > > Why would Micors & Mastr IIs be non-narrowbandable? > > http://www.com-spec.com/narrow.htm > > Bob NO6B >
