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
