Comments below:
Jim Cicirello wrote:
>Hello to Kevin and the Group:
>
>I have an excellent low split Micor VHF Base Station that I want to
>convert to 2 Meter. I have the contineous duty PA to go with it.I
>have read the excellent article from Kevin K3KKC on conversion using
>the Unified Chassis. Is there any references to the Intermittent Duty
>Stations like I have that uses the RIBBON from the backplane to the
>RX and TX Exciter? The pinouts are completely difference and I am
>looking for the best points for COR, Speaker, Etc. that are described
>for the Unified Chassis. I would presume that all the other mods such
>as the Control Module would be the same. Thanks in advance for the
>help.
>73 JIM KA2AJH
>
Hi Jim,
What you have is a Non-Unified Chassis. The fact it is different is not
because it's a intermittent duty station, but simply a different
configuration. Motorola made intermittent and continuous duty models in
both unified and non-unified chassis'.
Notes for the Non-Unified Chassis Channel Element enable:
For TX:
Pin 15 of the exciter (T1 select) goes to pin 16 in the ribbon cable.
This ultimately goes to the Remote Control Chassis (backplane board) to
pin 14 on the DC Transfer Module contact pins. Grounding this pin with
a jumper will allow F1 to work. Alternately, if keyed F1 is desired for
the TX element, run a jumper wire from pin 2 of the Station Control
backplane pin to pin 14 of the DC Transfer pins. Note: The DC Transfer
module should be pulled out, as the only module needed is the Station
Control Module.
For RX:
Pin 2 of the receiver RF - I-F board (R1 select) goes to pin 21 in the
ribbon cable. This ultimately goes to the Remote Control Chassis to pin
21 of the DC transfer module. Pin 21 of the DC transfer module will
need grounded at all times for the receiver to work. No DC Transfer
module is needed.
The rest of the conversion should be *basically* the same as what is
written in the article. Realize that most if not all of the signals
required to drive a controller can be found at the backplane where the
Squelch Gate Module interfaces. As the article suggests, I don't care
for the squelch gate module for my applications, but your situation may
be different.
Hope this helps...
Kevin Custer
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