The Texas VHF-FM Society, the group that regulates the repeaters in Texas. Now requires all repeaters to have a CTCSS tone to access, They do not require a repeater to broadcast a tone. Tones are selected to prevent a distant signal from bringing up a repeater far away. There is a 146.940 repeater in Houston, Austin, Lufkin, Beaumont. If there were no tone you with the right location and conditions, bring more than one up at a time. The advantage of programming a receive tone is when the band is open, you do not have to hear all the skip from other machines. There are quite a few repeaters that do not broadcast a CTCSS tone but require them to transmit on them. You do not have to program a receive tone in your radio even if the repeater broadcast it, it just make the radio work better as it does not open the receiver unless it hears the tone. But before programming your radio with a receive tone, make sure the repeater broadcast one.
Another point, some repeaters have a higher freq CTCSS tone than others. Lots of Houston (south Texas ) use 103.5 our Houston 146.940 uses 167.9 This is an audio tone. If you use a speaker or headphones with wide dynamic range, you can hear the CTCSS tone. This will sound like a hum. To avoid this, use only communications speakers or headphone. Or you can build a simple filter to block out the lower freq. From: BVARC <[email protected]> On Behalf Of Christopher Boone via BVARC Sent: Wednesday, February 22, 2023 9:46 PM To: BRAZOS VALLEY AMATEUR RADIO CLUB <[email protected]> Cc: Christopher Boone <[email protected]> Subject: Re: [BVARC] Icom 52a CTCSS / RX CTCSS confusion Most repeaters do not do cross tone. They transmit the same tone as they receive. Tone encode means that your radio just transmits the tone but is carrier squelch on receive... Tone squelch means that the transmitter transmits the tone and the receiver requires the same tone to unsquelch... This is of course provided that the repeater is transmitting the tone. There are some repeaters that only have tone on the receiver but not on the transmitter. I know of at least one in Houston but as far as the tones being different? No I don't know of anybody doing that except maybe one UHF repeater. On Wed, Feb 22, 2023, 9:34 PM Gayle Dotts via BVARC <[email protected] <mailto:[email protected]> > wrote: When I have CTCSS Hz / RX CTCSS as different values, as set by Texas repeaters book, I thought your "Tone mode" is set to TSQL as a result I hear nothing and Tx nothing. But...I can hear good set to TONE but I am not getting out at all. Please advise. Thankb you ________________________________________________ Brazos Valley Amateur Radio Club BVARC mailing list [email protected] <mailto:[email protected]> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Publicly available archives are available here: https://www.mail-archive.com/[email protected]/
________________________________________________ Brazos Valley Amateur Radio Club BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Publicly available archives are available here: https://www.mail-archive.com/[email protected]/
