Eric,
Thanks for your quick response. It's true that most of the ham grade
portables have far too much tone deviation as delivered. The issue here is
only with VX6's so far. Of the VX6's actually measured one was only 200 Hz
deviation and all seemed low, that is, none were up to 500 Hz. Have not
measured tone accuracy or distortion.
I doubt if these radios have been modified as the owners aren't
particularly technically inclined. One is blind.
So the questions remain: Is the Quantar PL sensitivity adjustable? Is it
a good thing to make it more sensitive? How do I convince some users that
there may be a problem with their radio?
"My radio worked before you guys messed with the repeater. Now it
doesn't. So fix the repeater." is the attitude. I would hate to compromise
an otherwise great repeater.
Al, K9SI
> Re: Quantar and PL
> Posted by: "Eric Lemmon" [EMAIL PROTECTED] wb6fly
> Date: Tue Sep 25, 2007 9:53 pm ((PDT))
>
> Al,
>
> Something doesn't sound right here... most Yaesu portables- including my
> own
> VX7- have far too much tone deviation as delivered. This is common with
> many Amateur-grade radios, and Alinco is the worst. The CTCSS deviation
> is
> usually not adjustable in the small portables, so the manufacturers
> apparently think that more is always better.
>
> I don't have experience with the VX6, but I would be surprised if the
> CTCSS
> deviation wasn't close to 900 Hz. Perhaps these users modified all of the
> radios to pad down the tone deviation, but I think that 500 Hz is ideal.
> I
> will check my Quantar service manuals at work for confirmation, but I
> suspect that the tone sensitivity is fixed.
>
> I wonder if there is another factor at work here, such as the purity of
> tone
> coming from the VX6 radios, and the tone accuracy. Does the Quantar work
> with other radio brands/models? Maybe it doesn't like raspy tones.
>
> 73, Eric Lemmon WB6FLY
>
>
> -----Original Message-----
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Al Wolfe
> Sent: Tuesday, September 25, 2007 9:24 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Quantar and PL
>
> We recently replaced an aging UHF machine with a Quantar for a local ham
> repeater. Now it seems that some users are not able to key up the system.
> Turns out their radios (all VX6's) have fairly low tone deviation. Tests
> on
> the Quantar show that it needs at least 300 htz to key it. This seems
> reasonable to me but the users all say "Well, my radio used to work with
> the
> old repeater. So fix the new one."
>
> Is there a way to increase the sensitivity to PL tones in a UHF Quantar?
> Is this desirable?
>
> Al, K9SI
