[nrv-hams] Ugly intermod

[Russ Abbey]

Thanks Mike!  I was wondering about that.  By the way, the 442.900 is alive
and working at it's site. We're waiting to get a new tower at the site to
get it up a lot higher.
I would also like to pass my best wishes to all of you.  I hope you have a
Very Merry Christmas and a Great New Year.

73
Russ Abbey
KG4MAV

On Mon, Dec 17, 2012 at 12:29 PM, Mike Harris <mharris at bluewireproto.com>wrote:

> Russ,
>
>         You hear multiple ID's because we have them linked on the actual
> channels and not on another frequency upstream of the controllers.  The 2M
> repeater is just listening to the 440 like it was a second receiver so when
> the 440 ID's it gets re-broadcasted on 2M and vice versa. So 2M sends it's
> ID like normal and then it 'hears' the 440 ID and just repeats it.
>
>         If you listen close you can tell the difference in the time
> stamps.  The clocks are about 10 seconds apart and the .18 will ID first in
> 12 hour format and the 440 will ID second in 24 Hour format.
>
>         For the rest of the group I sent this to Len this morning:
>
> The intermod is on the input to the 440 machine.  I was worried that it
> would be a problem when I put a pre-amp on it with that little duplexer.
> (Notch cavity)  Problem is that if I remove the pre-amp the regency
> receiver is pretty much deaf (.6 uV).
>
> Somewhere I have a 460 bandpass cavity set so I will try to find them over
> the next couple weeks and see if I can tune it up and move it to 440.  That
> should help.
>
> The noise is there a lot more than we hear but the CTCSS has it blocked
> most of the time.  What is getting through has enough energy to blast past
> the decoder and open the receiver.
>
>
> Mike Harris
> KA4EPD
>
>
>
>
>
>
> At 12:15 PM 12/17/2012, you wrote:
>
>> Just a note here, I have been hearing 3 and 4 ID's at a time coming thru
>> the links.  I don't understand why?  But am very interested in the outcome
>> due to Floyd's soon to be linked 2 meter and 440 repeaters.  We also have
>> the CAT-1000 on the 2 meter and a CAT 200b on the 440.  Good thread on
>> this
>> though, I have enjoyed the give and take on what might be wrong.
>> Russ, KG4MAV
>>
>> On Mon, Dec 17, 2012 at 7:05 AM, Robert McGwier <rwmcgwier at gmail.com>
>> wrote:
>>
>> > I want to point out that I haven't heard the intermod since the two
>> meter
>> > repeater went off the air.  I've been thinking the link is the likely
>> > culprit given the complete escape and bypass of the PL interference
>> > suppression system, I wonder if we can just suspend the link after the
>> two
>> > meter repeater is back on the air to test this hypothesis?
>> >
>> > Bob
>> >
>> >
>> >
>> > On Sun, Dec 16, 2012 at 3:27 PM, Robert McGwier <rwmcgwier at gmail.com>
>> > wrote:
>> >
>> > > I think there is some ugly intermod keying the 70 cm repeater.  Don't
>> > > know why PL isn't stopping it, but there you go.
>> > >
>> > > --
>> > > Bob McGwier
>> > > Owner and Technical Director, Allied Communication, LLC
>> > > Facebook: N4HYBob
>> > > ARS: N4HY
>> > >
>> > >
>> >
>> >
>> > --
>> > Bob McGwier
>> > Owner and Technical Director, Allied Communication, LLC
>> > Facebook: N4HYBob
>> > ARS: N4HY
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