Took a couple of antique GE Phoenix SX mobile radios. Programmed for 442.0/ 447.0. With TOT. Carrier Squelch - Took Receiver Un Squelched lead to PTT thru a one transistor keying transistor.
Took VOL / SQ Hi and ran it thru a single common emitter stage - bipolar amp and applied the collector output to the high side of the TX deviation control and set for +/- 1 Khz TXD. Did have to bypass the emitter leg of the single stage amp and wallah - DSTAR Repeater - sort of. Maybe P25 repeater too? Simple - really do need to regenerate the data signal and key on detected data with a CCD chip to give the preamble tone time to get thru. Until P25 radios become ham affordable I don't think they will be mainstream ham radio. I believe there is still a pretty hefty payment to Moto for use of the P25 standard, but I may be wrong. Steve NU5D On 4/24/07, Jim B. <[EMAIL PROTECTED]> wrote:
James wrote: > Bryon Jeffers K0BSJ wrote: >> >> Well I will agree with Nate on this one.. The crazy D-Star will only do >> it's AMBE digital and will not pass analog voice... >> >> At least when using a Quantar/Quantro with P25 capability you can set it up >> with CAI (Clear Air Interface)/P25 IMBE and it will do either analog voice >> > PSST ... hey there ... :) Doesn't CAI stand for Common Air Interface. (Thats > the Astro IMBE that all the manufacturers support, wheras BIG M used to have the > AMBE version) Yup! But don't use the term Astro. Astro is a Motorola trademark, like Private Line (PL)! IMBE is the vocoder chip type, and has nothing to do with Motorola. The original Astro used a VSLEP vocoder chip, and is not supported by Motorola anymore. > Ahhh ... the wonderful world of acronyms!! > > James Boy, is THAT an understatement!!!! -- Jim Barbour WD8CHL Yahoo! Groups Links
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