Eric;
Tnx fer reply. U R correct there is no circulator on either the
146.700/R or 146.970/R. I have a bandpass cavity. Which rptr does it
need to go on??? The 97/R has a Bp/Br wacom 641 duplexer. The 70/R
runs dual antennas w/o any filtering on the TX.
Jeff (w5ppb) owns the 147.240/R and is planning a freq change soon.
This rptr is one we like to link to during WX conditions allowing us
on the east side of MS to communicate with Jackson WX Service abt 90
miles away. We are receiving a tornado warningas I type this. The 4th
or 5th one today.
TNX,
Dennis ki5fw
--- In Repeater-Builder@yahoogroups.com, Eric Lemmon <[EMAIL PROTECTED]>
wrote:
> Dennis,
>
> You have classic third-order intermodulation interference. 146.970
times 2
> = 293.940 MHz. Subtract the 146.700 signal and you have 293.940 -
146.700
> = 147.240 MHz, the output of your linked repeater. Other mixing
products
> are possible. I suspect that neither the 146.970 repeater nor the
146.700
> repeater has a circulator on the output. Bandpass cavities on the
output
> are another option.
>
> 73, Eric Lemmon WB6FLY
>
> ki5fw wrote:
>
> > Hey Guys;
> > Why does my 146.970/Rptr when linked to a 147.240/Rptr get
interference
> > from a 146.700/Rptr. The 146.700/R is about 5-7 miles from my
> > 146.970/R. When the link is up and someone uses the 146.700/R it
> > creates terrible interference and you can actually understand
what is
> > being said on the 70/R.
> > The 70/R will not be heard or cause a problem until the 97/R is
> > accessed while linked to the 147.24/R. There is no problems when
the
> > link is down.
> > Will a notch filter on the remote base T/cvr to notch out 146.700
be
> > the cure? The remote base is frequency agile and wonder if the
notch
> > filter is the way to go. Guess it depends on how wide and deep the
> > notch is???
> > I tried the intermod Calculator and I think I see what the
problem is,
> > but not sure if I'm looking at it correctly.
> >
> > TNX in Advance,
> > Dennis ki5fw
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
