[Repeater-Builder] Re: Pyramid VRS to Motorola X9000

[skipp025]

 mzfb2001 m...@... wrote:
 I am looking for imformation to make a cable to connect 
 a Pyramid VRS to a Motorola Lowband X9000. The print out 
 provided by Pyramid works but its keeps the Pyramid in 
 constant transmit. Thanks for any help in advance
 Mike

I just sorted this same mess out for a customer who had 
to have it done. A low-band Syntor with a Pyramid SVR-200. 

The Pyramid Unit duplicated the PAC-RT connections with the 
exception of the enable disable line, which were routed up to 
the control head through a redefined wire and pin. The wire 
was then internally jumpered (inside the control head) to the 
adjacent control head plug and then brought out to an external 
on/off switch. 

It will work and there's nothing special about hooking it up. 
I received the Syntor-Pyramid combination wired with an original 
PAC-RT cable setup (obviously modified to plug into the SVR-200). 

I had and used the original Syntor Manual information, which 
includes the PAC-RT cable routing. The only magic and dance was 
actually getting the on/off switch to work through the control 
cable and head up front at the operator and control head mount 
position.  

So, in short it would be handy to have the Syntor Book with 
the PAC-RT cable info included. In fact, handy is pretty much 
a must have the manual if you're flying without one. 

s. 

[Repeater-Builder] Re: Pyramid VRS to Motorola X9000

[Mike Christie]

Skip
   Thanks for the reply. I got it working now by doing some reverse 
engineering. I found the basic application notes were okay except for the COR 
line. It was the cause of my problem with the Pyramid transmitter being key up 
all the time. I moved it to the Channel indicator on the radio side Pin 21 and 
bingo it came up started working just fine. What pin on RX/TX did you use for 
the COR line to make it work?
Mike