> > So, if you lack test equipment and have no choice but to use high-
> level
> > signals for tuning the pass, you should still be tuning for minimum
> > reflected power.
>
> So bird inbetween TX and cans, tuning on a source like an HT?
Yes. To take it one step further, a 6 dB pad (with suitable power rating of
course) between the HT and the Bird would help minimize the Z variation that
the PA in the HT sees, thereby reducing the variation in output power, and
possibly help save the PA from destruction if the cans are severely detuned.
> So that's what that is.. Never could find the exact same thing.
> A "rare bird" :) With the part number, I see that RF parts carries
> them.
Yeah, and Bird makes other varieties too, including directional coupler
elements. I have the directional ones for 1 5/8, 3 1/8", etc. line sections
for broadcast work. The one for the Bird 43 is rated for 500 watts maximum
thru-line power. The ones for 1 5/8" and larger are rated for much more (I
think the 1 5/8" is rated for 25 kW or thereabouts).
--- Jeff
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