Joe,

It's a small world!  I have exactly the same Motorola duplexer, that
came mounted on the back of a 100 watt MICOR MSY repeater previously
used by Union Oil Company.  My unit is marked TFE6080A SP300, and was
tuned to 451.675/456.675 MHz.

This unit comprises six helical resonators in a notch-only
configuration, and is known as a "Compact Base Station Duplexer."  A
friend of mine who is a Motorola technician tried to get information on
this unit from the factory, but found nothing.  Although it is more
rugged and has a deeper notch than the typical mobile notch duplexer, it
has practically no bandpass action and is therefore not suitable for use
at a congested site unless additional bandpass cavities are employed.

The SP300 marking on my unit suggests that it was not a standard
production item, and may account for the lack of available information
on it.  The photo in the link you provided seems to show a faint "SP"
after the model number... true?

73, Eric Lemmon WB6FLY

Joe wrote:
> 
I found this UHF BP/BR duplexer in back of some stuff while I was
cleaning the shack:
> http://users.adelphia.net/~k1ike/UHFbpbr1.JPG
> Anyone have an ID on this one?  It is marked TFE6080A and is mounted on a 19" 
> rack plate.
> 
> 73, Joe, K1ike
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>




 
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