Hi Mike,
What an opportunity to use your own technical skills. What do you need in the
way of performance from that switch on 6m? Probably two things: acceptable LOSS
and acceptable CROSSTALK. I'll bet that with relatively simple equipment, you
can measure both of these. To measure loss, just put power through it and
measure. Do this at the power level you plan to use, as the loss vs power curve
may not be linear. Crosstalk is probably linear - assuming no dielectric
breakdown - and you can measure that at low power. Apply a strong signal to the
common and measure the strength of the signal going straight through the
switch. Now, terminate the straight-thru path with 50 ohms, and measure the
signal strength with your receiver on the other switch positions. Too much
leakthrough or not? You decide. Best to do these measurements using the wide
dynamic range of a level-calibrated sig-gen and operate at the same point on
your receiver S-meter. The S-meter is notoriously non-linear, so good dB
measurements over its range are not terribly reliable.
By the time you finish these measurements, Tom will have provided a reliable
response against which you can can check your results!
73,
Jim K1IR
> Hi All,
Am wondering if anyone knows the cutoff frequency for the RCS-4 remote antenna
switch?
I understand W8JI designed it(?) I sent Tom an Email direct a few days ago but
no reply, so am going to the group. I saw a very old post on the 'Net (I
believe by Tom) which eluded to the fact that it may only be good to 30MHz.
am building a "K1WA Sloper Array", but for 6m. Is there any problem with this?
Does anyone out there know firsthand?
THANKS MUCH!!
7 3 de VE9AA, Mike in snowy NB.......DIT DIT
Michael, Coreen & Corey Smith (VE9AA, VE9AAA & Baby-VE9)
271 Smith Rd Waterville, NB E2V 3V6 Canada
http://members.tripod.com/~ve9aa/index.html
http://www.geocities.com/RainForest/Vines/2174/
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