RJ Communications made these, a small Phoenix company (of the three companies 
that made ferrite circulators in Phoenix: RJ, Celwave and EMR, RJ is the most 
obscure, and I believe they are no longer in business. 
The RJ design is identical to Celwave circulators. The one pictured is a 
non-tunable dual section design and it will likely fall off considerably in 
performance in the 440MHz range. Some will say you can mess with them and 
re-bias the magnets to move the freq but I would recommend finding the right 
part that was intended to be used at the freq range it was intended for because 
a dual section circulator used out of band will have considerable losses. 
W 6MTF



--- In [email protected], Ken Arck <ah...@...> wrote:
>
> I don't recognize the logo.
> 
> http://www.ah6le.net/circulator.jpg
> 
> Obviously it's a 2 stage one and the label says it's a Model CD-460S 
> with tuned-to freq. of 462.975 mHz.
> 
> I'm after some spec's on the thing.
> 
> Ken
> 
> ------------------------------------------------------------------------------
> President and CTO - Arcom Communications
> Makers of repeater controllers and accessories.
> http://www.arcomcontrollers.com/
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