Not the exact answer you want Eric... but at least some information is better than none.
I've been able to duplex a number of Mitrek and MSR-2000 Modules that were originally supplied/sold as standard half-duplex circuits. Don't know the details about the reedless ctcss board... The trick is to look at the actual circuit. Duplex operation requires two of the ic chip sets used to create the encode and decode functions. If a module was able to cross-code tones or has the pc board holes and parts placement locations then it probably can be duplexed if the encode/decode sections can be separated out. I've been able to duplex the cross-code CTCSS boards and modules that were sold half duplex by populating the board using surplus parts. In the case of the MSR-2000 CTCSS Module... I simply used the IC chips removed from the Mitrek Mobile CTCSS Board. The standard ctcss board in the Mitrek uses the same chip as the MSR- 2000 Repeater/base Station although they have different part numbers (go figure...). So take a look at the board to see if the pc-board will allow cross coding ctcss/dcs as your first clue. cheers, s. > Eric Grabowski <[EMAIL PROTECTED]> wrote: > > Does anyone know for certain whether the Mitrek > HLN4181A reedless PL board can be used for encode and > decode simultaneously? > > Eric, KH6CQ >
