[ARC5] Re: [Milsurplus] GP-x Transmitter, RAX Rcvr? + TU Wanted

[WA5CAB at cs.com]

Jack,

The GP-6 & 7 manual gives the serial number at which the suffix A was added 
to the tuning units in the 47150-47155 Navy Type Number range.  But of course 
it doesn't shed any light as to at what model and serial number the previous 
change occurred.  But at least tuning units marked GP-6 will plug into a 
transmitter marked GP-7.  The general rule is that a suffix A (or B, etc.) part 
number should be backwards compatible and an earlier (or no) suffix should usually 
be forward compatible.

In a message dated 11/2/2006 2:34:53 PM Central Standard Time, 
scr287 at sbcglobal.net writes: 
> I too find myself looking for a D range tuning unit for a GP-7.
> 
> But, the GP tuning units are not necessarily interchangeable
> between the series. I know that the tuning units for the GP-3
> will not fit a GP-7 and vice versa, the layout of the banana
> jacks is different. Also the CAY-xxxxx numbers are different
> between the two series.
> 

Robert Downs - Houston
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