I replied direct... but here's the basic thought behind a dual band-width repeater.
I would assume you are using ctcss... or should be. Here's an example: Program a newer wide & narrow mode radio to receive only scan 4-number of channels/frequencies with ctcss decode each. Frequency A: Wideband rx - ctcss 67Hz Frequency B: Wideband rx - ctcss 77Hz Frequency C: Narrow-band rx - 100Hz Frequency D: Narrow band rx - 123Hz The radio set to scan will stop and decode valid signals as described above. You will need to add a descriminator output lead to the radio (for external ctcss decoding). Program a radio or repeater for transmit with the matching or desired channels if your tx radio has external channel steering capacity. Depending on the specific equipment... external ctcss decoder(s) or repeater tone panel with available logic output gates key the proper transmit frequency. I did the above with Kenwood Commercial Radios... I can think of a number of methods to do dual band-width with other equipment. Just a question of how practical it might be to obtain and assemble the hardware. In the case of Midland Syntech Radios I see dumped cheap on ebay... can also do similar functions using surplus Midland and other brand radios. A radios scan feature is very handy as my 6 meter repeater also has a 500 & 600KHz offset receiver using a Midland Syntech Receiver in scan with priority. I cover both the original California 600KHz offset and the newer 500Khz offset at the same time. As always... your results will probably vary. cheers, skipp > johnkihl" <[EMAIL PROTECTED]> wrote: > > These are both repeaters, but we are looking at the one wideband machine > as having 155.160 only, they are both next to each other. What you > describe is a sort of bridge circuit. > > Could you describe as to how you would accomplish this bridge > circuit? > > 73 > John > kb3nqs > --- In [email protected], Mike Morris <wa6ilq@> wrote: > > > > At 03:25 AM 12/30/06, you wrote: > > >Scott, > > > > > >The CAP is going from wideband FM to narrowband FM in > > >a few months, We are exploring the Idea of using the old > > >GE master II machine on 155.160 and crossbanding it with > > >the new Motorola quantar Narrowband machine.freq pair for > > >interoperability. > > > > > >The question that comes to mind is how to you convert the > > >audio deviation from wide to narrow and back again, in a > > >cost effective manner.? > > > > > >Any input on this idea would be appreciated > > > > > >John > > >kb3nqs > > > > Do it at the audio level. > > > > Take the narrow receiver and add a line level repeat audio output that > > provides 0dbm when deviated fully. > > > > Do the same to the wide receiver. > > > > Take the narrow transmitter and add a line level audio input that > > when fed with 0dbm deviates fully. > > > > Do the same to the wide transmitter. > > > > Are these repeaters or wireline controlled base stations? > > > > How you connect everything up depends on the operational > configuration. > > >
