RE: [Repeater-Builder] WTT (Potentially): CAT 1000B w/ options for ACC RC96
-Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of surf_boy82 Sent: Sunday, July 05, 2009 8:35 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] WTT (Potentially): CAT 1000B w/ options for ACC RC96 Hi Group, Recently bought a CAT 1000B controller that includes the rack mount cabinet, DVR, and RLS-1000B remote/link switch. Not 100% sure if I want to do this yet or not, but I thought I'd put the feelers out and see if anyone would be interested in the event I decide to go forward with it. I'd like to trade the above for an ACC RC96 in the rackmount cabinet with the display/control front panel on it. Obviously it would need to be in fully working condition. Would anyone have any interest? Please reply off-list. Thanks, Chris/AJM Chris, If you decide to trade, you might want to put your offer on the ACC list: a...@yahoogroups.com John Yahoo! Groups Links __ NOD32 4219 (20090705) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com
[Repeater-Builder] Re: Need microphone Pin Outs For QUANTAR
Tim, According to the diagram on page 5 of 6881085E13-C, the wiring of handset connector P10 on the Station Control Module CLN6873D is as follows: 1 is NC 2 is receive audio output through a 1 kohm resistor 3 is mike PTT 4 is mike audio input 5 is chassis ground 6 is signal ground 73, Eric Lemmon WB6FLY --- In Repeater-Builder@yahoogroups.com, afa5tp w7...@... wrote: Happy 4th Group! I am in need of microphone jack pin out for the Quantar Rpt. I have plenty of Motorola mikes, but all have the wrong size modular connector! Once I get the correct pin out, I have crimper in hand, and ready to go! Thanks much for any info. TIM W7TRH Vashon Is. Wa.
[Repeater-Builder] TKR-720 Programming - Bit Pattern in EEPROM
Hi Guys, Can't find a KPT-50 programmer within easy reach, so figured I'd re-program the EEPROMs 'manually'. Does anybody know what the bit patterns inside the 1k eeproms are? (both the freq one, and the PL)? Figured I'd give it a shot. Thanks, Tim W5FN
Re: [Repeater-Builder] TKR-720 Programming - Bit Pattern in EEPROM
Brute Force Hacking the TKR-820 / 720 Series Hey, these make great little repeaters. They also are becoming fairly common on the surplus market as companies are caving into the idea that digital cellular is a better alternative to NBFM. Well anyway I am sure you bought one for cheap or acquired one by some other means with the thoughts that you could drag it into the ham band. So lets begin. First lets make sure the repeater works. Start by connecting a watt meter with dummy load to the TX port (Or the antenna port on models with the built in duplexer). Use the 25W 200-500 or 400-1000 slug are the closest thing you have. Loosen the squelch until the repeater goes into transmit mode, remember to press the repeat button on the front panel. Won’t do it? Turn the unit off pull the covers and remove the 93C46 EEPROM from the controller board (This is the little board that is about 3X5 and sits above the radio chassis’). This sets the DPL/PL combination and without it the repeater will activate on COS. Turn it back on and it should repeat. Got RF power? Good. Set this little bastard aside as we will deal with him later. Next step is to take write down the voltage on the from the test points besides the VCOs. The VCOs are located under the metal tray that the controller sits on. This should be some where around 4 volts DC. Now we have to come up with a way to change the data that sets the frequency of the repeater. For some reason the chip that does this is on the circuit board on the front panel of the repeater. I was originally told that “Either a KPT-20 or KPT-50 is need to program those. No way around it.” That sounds like a wager to me. Sure if you have a Kenwood dealer around that you can borrow one from or willing to spend more than you bought the repeater for this is a sure fire method. Oh, you will also need the KPG-21D software, but it will not allow operation into the ham bands and has some serious compatibility issues running on modern hardware. Unsolder the 93C46 EEPROM from the front panel board. Use what ever method you like, I prefer my trusty static free Soldapult. Be careful not to rip and leads off the package when removing it. Place an 8 pin DIP socket in the hole that you got the EEPROM out of and solder it down. Now we get the data out of the chip. I built a serial port to EEPROM interface found here: http://www.lancos.com/e2p/siprog_base.png and http://www.lancos.com/e2p/si-prog-v2_2.pdf in order to be used with the device programming software “Pony Prog” http://www.lancos.com/prog.html. You have to build the base board and then the socket for the device you wish to program. I replaced the LM2936Z-5 in the schematics with a 5.1 V Zener diode fed with a 330 ohm resistor to generate the +5 needed, and BC547 is the European equivalent of a 2N3904. This way all parts can be obtained from your local Radio Shack, or your parts box depending on how much home brew you do so well. So once you have the interface built and running you can read the EEPROM contents. The settings take a little while to get used to. All you want it to output to is a raw binary dump with no header information saved. Open the dump with a hex editor. I like XVI32, http://www.chmaas.handshake.de/delphi/freeware/xvi32/xvi32.htm . Pretty hard to beat free. Now for some reason the Pony Prog spit out information that is interleaved. This is evident by the way the data is arranged at H7A, Which on my dumps is 8R021N. On a Kenwood KPG-21D generated image this should say R820N. Anyway, it makes the hex coding easier to understand when doing the channels. If you are using a different chip program that did it right you will have to swap the bytes around, i.e C884 to 84C8. It should be obvious when you do the calculations and your frequency is in the 650MHz region. Receiver frequency data starts at H00 and it 2 bytes long. In my binary image I have H8338. Open up the windows calculator and place it in scientific mode (Or you can use a decent calculator that will convert Hex to decimal such as the TI-36X.). Press the “Hex” button and enter in the data that you have. Then press “Dec”. H8338 = 33592. Now we multiply this by the channel stepping. 12.5 for the TKR-820 and 5 for the VHF 720. 33592 * 12.5 = 419900. Now we add the IF frequency 419900 + 21400 = 441300 441.300MHz. You still with me? Good. The transmit side is the exact same thing, but starts at H02. I find this odd that both the transmit side and the receive side use IF frequencies on the synthesizers, but what ever. Now that you have reverse engineered what channels the repeater is on, Stick that chip back in there. You get to do…. More testing. If you have the internal duplexer now would be a good time to bypass it and go straight into a watt meter and dummy load. If you are satisfied with the repeaters performance you may continue to changing the frequency. Figure out the target frequency you want and we will go from there. 443.400MHz RX 443400 – 21400
[Repeater-Builder] Re: TKR-720 Programming - Bit Pattern in EEPROM
Hi DCFLUX, Thanks a bunch... that's just what I was looking for!! It's already running on a known frequency, so the info should work fine. Thanks again, Tim W5FN --- In Repeater-Builder@yahoogroups.com, tahrens301 tahr...@... wrote: Hi Guys, Can't find a KPT-50 programmer within easy reach, so figured I'd re-program the EEPROMs 'manually'. Does anybody know what the bit patterns inside the 1k eeproms are? (both the freq one, and the PL)? Figured I'd give it a shot. Thanks, Tim W5FN
[Repeater-Builder] Mobile antenna mounting options - old reference
There was an awesome pictorial in the back of some two way manual, I'm thinking back to the Micor or Exec era. It was a study with results showing what the loss of various mobile mounting solutions were with respect to the center of the roof location used for reference. Anyone have a scan of this?
Re: [Repeater-Builder] Mobile antenna mounting options - old reference
Funny, I was just looking at this on Friday! Makes my 1/4 trunk-mount seem less effective! http://www.larsen-antennas.com/docfiles/ASB9/Mobile/MobileSeriesDesignations.pdf Daron Wilson wrote: There was an awesome pictorial in the back of some two way manual, I'm thinking back to the Micor or Exec era. It was a study with results showing what the loss of various mobile mounting solutions were with respect to the center of the roof location used for reference. Anyone have a scan of this?
Re: [Repeater-Builder] Mobile antenna mounting options - old reference
I remember seeing one in a Decibel catalog. Do you have one? Chuck WB2EDV - Original Message - From: Daron Wilson To: Repeater-Builder@yahoogroups.com Sent: Monday, July 06, 2009 4:32 PM Subject: [Repeater-Builder] Mobile antenna mounting options - old reference There was an awesome pictorial in the back of some two way manual, I'm thinking back to the Micor or Exec era. It was a study with results showing what the loss of various mobile mounting solutions were with respect to the center of the roof location used for reference. Anyone have a scan of this?
[Repeater-Builder] Ctcss dropout due to loud voice
Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3khz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au
Re: [Repeater-Builder] Ctcss dropout due to loud voice
On Tue, 7 Jul 2009, kerinvale wrote: Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3khz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Your user is over-deviating. Reduce the deviation in his radio, or tell him not to yell into the mic. The dropout is because his signal is passing outside of the receiver's bandpass. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Ctcss dropout due to loud voice
I have to wonder how you can know this is a signal passing out of the passband as opposed to talkdown (what the OP was asking about). Both would sound virtually identical. While I agree deviation should be checked, I wouldn't go so far as to rule out either cause based on the description. Joe M. Kris Kirby wrote: On Tue, 7 Jul 2009, kerinvale wrote: Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3khz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Your user is over-deviating. Reduce the deviation in his radio, or tell him not to yell into the mic. The dropout is because his signal is passing outside of the receiver's bandpass. -- Kris Kirby, KE4AHR Disinformation Analyst Yahoo! Groups Links
Re: [Repeater-Builder] Ctcss dropout due to loud voice
Thanks .These maxons pm160 are straight from the makers and the deviation hasn't been touched but I will check this radio on our service monitor and see how it goes. Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au ---Original Message--- From: Kris Kirby Date: 7/07/2009 07:40:08 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Ctcss dropout due to loud voice On Tue, 7 Jul 2009, kerinvale wrote: Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3khz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Your user is over-deviating. Reduce the deviation in his radio, or tell him not to yell into the mic. The dropout is because his signal is passing outside of the receiver's bandpass. -- Kris Kirby, KE4AHR Disinformation Analyst
[Repeater-Builder] Re: Ctcss dropout due to loud voice
I had the same problem on a commericial repeater which was a GE Exec II. The user radios were all Motorola M120. The modulation parameters were normal, although I don't remember just what they were at the time. Since the radios did not have mic gain controls (maybe there was an adjustment in software, I don't know), I modified each radio so as to reduce the amount of mic audio getting to the transmitter audio circuit. I had no problems after that. Laryn K8TVZ
Re: [Repeater-Builder] ctcss dropout due to loud voice
I think you will find that shouting into the mic will talk off the CTCSS. The last new radio I tested had 5.8-5.9 KHz dev fresh out of the box. My standard test is to yell a FOUR into the mic with my lips just a 1/4 inch off the mic grille. And it's instinctive for the people in a vehicle to speak up when traffic noises are loud, especially when the window(s) are open. A bench test on a brand new radio HAS to include yelling into the mic. Mike At 02:51 PM 07/06/09, you wrote: Thanks .These maxons pm160 are straight from the makers and the deviation hasn't been touched but I will check this radio on our service monitor and see how it goes. Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 http://www.kerinvalecomaudio.com.au/www.kerinvalecomaudio.com.au ---Original Message--- From: mailto:k...@catonic.usKris Kirby Date: 7/07/2009 07:40:08 To: mailto:Repeater-Builder@yahoogroups.comRepeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Ctcss dropout due to loud voice On Tue, 7 Jul 2009, kerinvale wrote: Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3khz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Your user is over-deviating. Reduce the deviation in his radio, or tell him not to yell into the mic. The dropout is because his signal is passing outside of the receiver's bandpass. -- Kris Kirby, KE4AHR Disinformation Analyst
RE: [Repeater-Builder] ctcss dropout due to loud voice
Chris, Assuming this is for a ham repeater and not commercial. Have the user bring his radio to you and tune it so that he not over deviated. I had to do this to a club guy here in Colorado. Mike Mike Mullarkey K7PFJ 6886 Sage Ave Firestone, Co 80504 303-954-9695 Home 303-954-9693 Home Office Fax 303-718-8052 Cellular From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Morris WA6ILQ Sent: Monday, July 06, 2009 4:23 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] ctcss dropout due to loud voice I think you will find that shouting into the mic will talk off the CTCSS. The last new radio I tested had 5.8-5.9 KHz dev fresh out of the box. My standard test is to yell a FOUR into the mic with my lips just a 1/4 inch off the mic grille. And it's instinctive for the people in a vehicle to speak up when traffic noises are loud, especially when the window(s) are open. A bench test on a brand new radio HAS to include yelling into the mic. Mike At 02:51 PM 07/06/09, you wrote: Thanks .These maxons pm160 are straight from the makers and the deviation hasn't been touched but I will check this radio on our service monitor and see how it goes. Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au http://www.kerinvalecomaudio.com.au/ ---Original Message--- From: Kris Kirby mailto:k...@catonic.us Date: 7/07/2009 07:40:08 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Ctcss dropout due to loud voice On Tue, 7 Jul 2009, kerinvale wrote: Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3khz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Your user is over-deviating. Reduce the deviation in his radio, or tell him not to yell into the mic. The dropout is because his signal is passing outside of the receiver's bandpass. -- Kris Kirby, KE4AHR Disinformation Analyst Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: 270.13.5/2220 - Release Date: 07/05/09 17:54:00
RE: [Repeater-Builder] Ctcss dropout due to loud voice
Ian, I suspect that the problem is talk off caused by overdeviation of the mike audio. When the CTCSS tone is mixed with the mike audio prior to the deviation limiter stage, an excessive voice signal will be hard limited along with the CTCSS tone, causing a distorted signal. This problem occurs quite often in Amateur-grade equipment, since the makers often have very hot tone deviation that is set with a fixed resistor rather than adjustable as in most commercial-grade radios. Alinco, Icom, and Yaesu handhelds seem to have this problem all the time. Every Alinco handheld I've tested has a PL deviation above 1 kHz, and a few samples were up to 1.5 kHz- about three times the necessary amount. Needless to say, a tone deviation of 1.5 kHz doesn't leave much room for voice deviation, and all it takes is a loud talker to cause the limiter to squash the modulating signal and distort the CTCSS tone enough for the repeater to drop. It's not easy, but I have padded the CTCSS tone circuit in several Alinco and Yaesu radios to reduce the level to less than 500 Hz deviation, and that cures the problem. Most modern repeaters can detect a tone as low as 100 Hz deviation, so setting the tone between 400 and 500 Hz should work fine. Of course, there are diddle-stick artists who can't resist cranking up the mike gain pot so that they will sound better (they think) and make the problem worse. In order to stay within a 16K0F3E emission envelope, the total deviation should be limited to around 4.8 kHz. Most commercial-grade radios reduce the voice gain when a tone is added, but cheap radios aren't that smart. If the total deviation is limited to, say, 4.8 kHz, but a tone is not used, the voice deviation will sound softer. I suspect that the diddle-stick artist cranks up the gain to offset that low level. I suggest that you set the CTCSS deviation to 500 Hz, and ensure that the deviation limiter is set no higher than 5.0 kHz. See if that reduces or eliminates the talk-off problems. The Maxon service manual should have a procedure for mike gain and limiter setting, which should be followed. The fact that only some users have the problem strongly points to the user radios, rather than the repeater. Also, ensure that the problem radios are exactly on frequency. Please keep this list informed as to your findings and progress. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kerinvale Sent: Monday, July 06, 2009 2:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Ctcss dropout due to loud voice Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3kHz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au http://www.kerinvalecomaudio.com.au/ http://geo.yahoo.com/serv?s=97359714/grpId=104168/grpspId=1705063108/msgId= 92448/stime=1246912865/nc1=5349274/nc2=5741391/nc3=4025338
[Repeater-Builder] QUNANTAR Battery Revert Cable Plug
Hello Group, Is there an aftermarket plug available for the rpt. end of the battery revert cable for the 125 watt VHF Quantar. Or, does anyone have any tips for connecting cables for this option? Thank You! Tim W7TRH/AFA0TP Wa.
RE: [Repeater-Builder] Ctcss dropout due to loud voice
At 7/6/2009 17:39, you wrote: Ian, I suspect that the problem is talk off caused by overdeviation of the mike audio. When the CTCSS tone is mixed with the mike audio prior to the deviation limiter stage, an excessive voice signal will be hard limited along with the CTCSS tone, causing a distorted signal. This problem occurs quite often in Amateur-grade equipment, since the makers often have very hot tone deviation that is set with a fixed resistor rather than adjustable as in most commercial-grade radios. Alinco, Icom, and Yaesu handhelds seem to have this problem all the time. Every Alinco handheld I've tested has a PL deviation above 1 kHz, and a few samples were up to 1.5 kHz- about three times the necessary amount. Needless to say, a tone deviation of 1.5 kHz doesn't leave much room for voice deviation, and all it takes is a loud talker to cause the limiter to squash the modulating signal and distort the CTCSS tone enough for the repeater to drop. Since the CTCSS is injected into the modulator after the limiter, a higher CTCSS deviation level wouldn't cause increased clipping in the TX. In fact, I suspect the reason for the higher CTCSS level settings from the factory is to overcome the lack of any high pass filtering in the voice modulation path. Ideally, everything below 300 Hz would be filtered out of the voice audio, but most (cheap) radios don't have this filtering (gotta save that $0.25 per radio by omitting a couple more Rs Cs). If this is the case, lowering the CTCSS level will probably make the problem worse. Perhaps lowering the voice (clipped) deviation level so that the total deviation is somewhat less than 5 kHz will reduce the voice to CTCSS ratio to the point that the CTCSS decoder can find the tone amongst all the sub-300 Hz voice audio. Another solution is to install a bottle of helium with a dispensing tube run up the mic cable with a solenoid valve activated by the PTT switch ;) Bob NO6B
RE: [Repeater-Builder] Ctcss dropout due to loud voice
Thanks guys .I will check these out and let you know what I find Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au ---Original Message--- From: Eric Lemmon Date: 7/07/2009 10:40:41 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Ctcss dropout due to loud voice Ian, I suspect that the problem is talk off caused by overdeviation of the mike audio. When the CTCSS tone is mixed with the mike audio prior to the deviation limiter stage, an excessive voice signal will be hard limited along with the CTCSS tone, causing a distorted signal. This problem occurs quite often in Amateur-grade equipment, since the makers often have very hot tone deviation that is set with a fixed resistor rather than adjustable as in most commercial-grade radios. Alinco, Icom, and Yaesu handhelds seem to have this problem all the time. Every Alinco handheld I've tested has a PL deviation above 1 kHz, and a few samples were up to 1.5 kHz- about three times the necessary amount. Needless to say, a tone deviation of 1.5 kHz doesn't leave much room for voice deviation, and all it takes is a loud talker to cause the limiter to squash the modulating signal and distort the CTCSS tone enough for the repeater to drop. It's not easy, but I have padded the CTCSS tone circuit in several Alinco and Yaesu radios to reduce the level to less than 500 Hz deviation, and that cures the problem. Most modern repeaters can detect a tone as low as 100 Hz deviation, so setting the tone between 400 and 500 Hz should work fine. Of course, there are diddle-stick artists who can't resist cranking up the mike gain pot so that they will sound better (they think) and make the problem worse. In order to stay within a 16K0F3E emission envelope, the total deviation should be limited to around 4.8 kHz. Most commercial-grade radios reduce the voice gain when a tone is added, but cheap radios aren't that smart. If the total deviation is limited to, say, 4.8 kHz, but a tone is not used, the voice deviation will sound softer. I suspect that the diddle-stick artist cranks up the gain to offset that low level. I suggest that you set the CTCSS deviation to 500 Hz, and ensure that the deviation limiter is set no higher than 5.0 kHz. See if that reduces or eliminates the talk-off problems. The Maxon service manual should have a procedure for mike gain and limiter setting, which should be followed. The fact that only some users have the problem strongly points to the user radios, rather than the repeater. Also, ensure that the problem radios are exactly on frequency. Please keep this list informed as to your findings and progress. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kerinvale Sent: Monday, July 06, 2009 2:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Ctcss dropout due to loud voice Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone is talking loud on a repeater .The repeater radios are maxon pm150 (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone at 3kHz modulation to make sure it doesn't happen ,but I have one user that talks louder than the other users and it seems to breakup all the time for them where other users seem to have no problems.Could I make sure their ctcss from their maxon pm160 is around 600hz or 700hz or could the problem be more tied up with the receiving repeater radio Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au http://www.kerinvalecomaudio.com.au/ http://geo.yahoo.com/serv?s=97359714/grpId=104168/grpspId=1705063108/msgId= 92448/stime=1246912865/nc1=5349274/nc2=5741391/nc3=4025338
