Found this older message below in my spam folder... apparently I have
an overactive antispam application....
At 03:26 PM 5/30/05, you wrote:
>Steve,
>
>I gotta admire a guy who is willing to do all of the engineering
>calculations for duplexer jumper cables! The optimum jumper length must
>consider the length of the loops that are within the cavities. However,
>in this particular case, Sinclair has already done the hard part.
>
>Sinclair fabricates the Q-202G harness as a complete assembly using crimp
>connectors and tees, with RG-214/U double-shielded cable. You can use
>RG-400/U cable if you account for the slight difference in velocity
>factor. Keep in mind that Sinclair can meet their Q-202G specs over the
>entire 138-174 MHz band, using only
>two harnesses, so the lengths are not supercritical.
>
>The standard harness for the 150-174 MHz band measures about 12" between
>the centers of the cavity tee connectors. The harness for the 138-150 MHz
>band measures about 14" between centers. You can purchase the harness
>directly from Sinclair for about $120. Visit www.sinctech.com for more
>information.
>
>73, Eric Lemmon WB6FLY
One trick I saw done was to take a male-to-make adapter
and a female-to-female adapter and screw them together.
Put this set on the end of the each of the existing too-short
harness segments, and try the tuning. It may be enough.
If not, put another set on the other end of each cable.
A bunch of adapters is something you can try before you
order a new harness.
Mike
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