[arm-allstar] GE master II

[David McGough]

Hi Lito,

The SimpleUSB driver works fine with Mastr II hardware, whether a simplex 
radio or repeater.

There are a myriad of options available with Mastr II's. The core hardware
(i.e. radios) is all fairly similar, the biggest area of difference being
if you have a PLL type exciter, versus the simpler crystal-multiplier
type. The PLL exciter uses direct FM, whereas the multiplier version is
phase-modulated FM...Boiling this down, it basically means different audio
drive levels (and equalizations) are needed. The PLL exciters were
specifically for VHF hi-band repeaters. I've heard rumors of PLL hardware
for exciters other than VHF-hi, but never personally seen any.

Also, you will need a simple level shifter for squelch COS signaling from
the Mastr II. ...For simplicity, an aftermarket PL decoder/encoder is a
good method, if PL capability is needed.

One thing to also note is that the exciters can be VERY wide-band--so,
it's very important to using a properly filtered TX audio source. URI or
RIM style audio adapter already include audio low-pass filtering. If you
want to use a unfiltered USB FOB, make sure to follow it with a LP filter
to stop DAC aliases, etc., which could wide-band modulate the exciter!

About the single best resource I've found on the Internet for all things 
Mastr II, Rangr, etc., is the repeater builder website, here:

http://www.repeater-builder.com/ge/geindex.html

73, David KB4FXC



On Thu, 26 May 2016, Roselito de los Reyes via arm-allstar wrote:

> Good morning!
> 
> I was told that simpleusb does not work with this repeater. Is this 
true? Can someone share the harness pinout for a full duplex 
configuration and the simpleUSB settings associated with the setup.
> 
> Thanks and 73
> 
> Roselito De Los Reyes
> 
> Kk6oos
> > 
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