Re: [AMRadio] 10 Meter AM Frequencies
Hello Don: Several of the HX-10 units locally sound pretty fair with a new microphone. Also same applies to the HR-2600 and HR-2510. Use low Z dynamics 500-600 Ohms. D-104 does not work well. Regards, Charlie, K0NG
Re: [AMRadio] 10 Meter AM Frequencies
I have a Comsat 35 for trade or sale. bob...w2ami - Original Message - From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Tuesday, April 04, 2006 8:42 PM Subject: Re: [AMRadio] 10 Meter AM Frequencies Rick/K5IZ wrote: Has anyone made this modification to an old Lafayette Comstat 25? I have a couple of those I've been wanting to convert to 10 meters. I believe the Lafayette Comsat 25 is the same basic rig as my Robyn T-123B I changed the first two A oscillator crystals to 25.325 and 25.385 MHz and ended up with channels 1 thru 8 as follows: 29.000 MHz 29.010 29.020 29.040 29.060 29.070 29.080 29.100 MHz There is good info on these rigs at CBC International's website http://www.cbcintl.com/ under Crystal Mixing Charts. For my specific rig look at http://www.cbcintl.com/XTALS/AM%2014950-23290-11275-11730.pdf Steve WD8DAS
Re: [AMRadio] 10 Meter AM Frequencies
Can't remember which model, Comstat 25, 25A, or 25B but somewhere in the middle of its series, they changed the crystal mixing frequencies. Didn't change the model number but followed it up with a service bulletin to the retail stores who had service shops. The 25 series was a very hot retail item for years. If any of you are doing conversions and run across a bad crystal in the mixer or oscillator bank, I may still have some available. When Lafayette was closing down many of their stores, I acquired as many service parts for their stuff as I could. I've been picking at this stuff for 20 years but there's still a bunch in bags, boxes, etc. Pete, wa2cwa Rick/K5IZ wrote: Has anyone made this modification to an old Lafayette Comstat 25? I have a couple of those I've been wanting to convert to 10 meters. I believe the Lafayette Comsat 25 is the same basic rig as my Robyn T-123B I changed the first two A oscillator crystals to 25.325 and 25.385 MHz and ended up with channels 1 thru 8 as follows: 29.000 MHz 29.010 29.020 29.040 29.060 29.070 29.080 29.100 MHz
Re: [AMRadio] 10 Meter AM Frequencies
Thanks Steve... I'll check out the site you quoted. I'd like to be ready to go when 10 comes around again... unfortunately, I fear I have a long wait. 73, Rick/K5IZ [EMAIL PROTECTED] wrote: I believe the Lafayette Comsat 25 is the same basic rig as my Robyn T-123B
Re: [AMRadio] 10 Meter AM Frequencies
While we're on the subject of cb mixing schemes, I have a Lafayette Telsat 1023 that I want to turn into a ten meter beacon, which xtals do I need to change to what to get it somewhere in the range of 28.2 - 28.3? Have a couple generic radios I need to dig out of the closet and play with on ten AM. It's amazing how often it's open, I can copy a half dozen beacons. I reckon folks are all listening to each other - and not beacons - so they think the band's dead. It's a shame when the only voice signals I hear some days on ten are the pirates. Tom NU4G I changed the first two A oscillator crystals to 25.325 and 25.385 MHz and ended up with channels 1 thru 8 as follows: 29.000 MHz 29.010 29.020 29.040 29.060 29.070 29.080 29.100 MHz
Re: [AMRadio] 10 Meter AM Frequencies
From: [EMAIL PROTECTED] [EMAIL PROTECTED] I'm somewhat intrigued with converting a CB radio to 10 meters from the pure technical perspective, but the typical 4 watts AM power leaves a LOT to be desired. Am I missing something here? I have a Radio Shack HTX-10 that does 7 watts AM but is more respectable on FM and SSB at 25 watts. I have one of those too, but have probably used it a dozen times in the past 5 years or so. When on 10m I much prefer my Eico 720 with modified 730 modulator, with the rig excited by a 40m DDS VFO. Sounds much better and puts out a bigger signal. The 7 watts on AM wouldn't be bad when 10m is open. But the thing has terrible audio. I looked at the schematic and couldn't figure out how to modify the audio so it wouldn't be so tin-can sounding. Has anyone else figured out how to do this? Of course you could always run a leenyar to boost the power. Don k4kyv ___ This message was typed using the DVORAK keyboard layout. Try it - you'll like it. http://www.mwbrooks.com/dvorak/ http://gigliwood.com/abcd/
RE: [AMRadio] 10 Meter AM Frequencies
-Original Message- From: Donald Chester [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 05, 2006 4:51 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] 10 Meter AM Frequencies SNIP The 7 watts on AM wouldn't be bad when 10m is open. But the thing has terrible audio. I looked at the schematic and couldn't figure out how to modify the audio so it wouldn't be so tin-can sounding. Has anyone else figured out how to do this? Of course you could always run a leenyar to boost the power. Don k4kyv Don - I have heard that the microphone is a big part of the problem. I'm going to mess around with mine to see if I can improve the audio. Then again, I never had a problem because I used it on CW/SSB. But it might be worth a try since it's external to the radio which makes it easy to do/un-do. 73, Mark W1EOF -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/301 - Release Date: 4/4/06
RE: [AMRadio] 10 Meter AM Frequencies
Folks, Thanks. Great info ... just what I needed! I plan to do it to a Courier Royale. It's part of my Collins Collection cuz it has a Collins Mechanical filter in it's IF. ;-) 73, Theo K4MO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Monday, April 03, 2006 10:52 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] 10 Meter AM Frequencies [EMAIL PROTECTED] writes: just changing four of the xtals in the xtal synth circuit and ending up with 23 channels in the 10 meter band. In my Robyn T-123B 23-channel tube-type crystal-mixing type CB, I changed the first two A oscillator crystals to 25.325 and 25.385 MHz and ended up with channels 1 thru 8 as follows: 29.000 MHz 29.010 29.020 29.040 29.060 29.070 29.080 29.100 MHz There is good info on these rigs at CBC International's website http://www.cbcintl.com/ under Crystal Mixing Charts. For my specific rig look at http://www.cbcintl.com/XTALS/AM%2014950-23290-11275-11730.pdf Steve WD8DAS [EMAIL PROTECTED] __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] 10 Meter AM Frequencies
Most activity is on 29.1 to 29.2 So you can select crystals to move up 2 Mhz so you will have channels beginning with 29.0. Some started at 28.9XX so the channels fell at 29.0,29.01,29.02,29.035,etc. If your rig has a claifier it can be set to tune between channels as they are not all on 10 khz spacing. Much of the QRp activity on 10 was on 29.060 in years past. I often monitor 29.060 but don't hear much Others monitor 29.00. Healthfully yours, DON W4BWS - Original Message - From: Theo Bellamy [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Monday, April 03, 2006 8:49 AM Subject: [AMRadio] 10 Meter AM Frequencies I seem to remember that about 20 years ago some folks were converting 23 channel CB rigs to use on 10 meters (by legal hams, of course). I think they were just changing four of the xtals in the xtal synth circuit and ending up with 23 channels in the 10 meter band. At the time I think there was some sort of agreed upon scheme so everyone was ending up on the same 23 frequencies. Does anyone know what these are? If not, what would be a good choice of frequencies for such a conversion? I have an old antique tube type CB rig I want to put on 10 meters. Thanks 73, Theo K4MO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] 10 Meter AM Frequencies
Personally, since the demand for the Courier Royale is high among CB collectors, I would sell that rig, Ebay or whatever. $75 to $150 is not uncommon for that rig. Take the proceeds and buy several cheap CB's that you can diddle with, steal parts, etc. or get a used Uniden HR-2510 or 2600. Pete, wa2cwa On Tue, 4 Apr 2006 08:56:48 -0400 Theo Bellamy [EMAIL PROTECTED] writes: Folks, Thanks. Great info ... just what I needed! I plan to do it to a Courier Royale. It's part of my Collins Collection cuz it has a Collins Mechanical filter in it's IF. ;-) 73, Theo K4MO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Monday, April 03, 2006 10:52 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] 10 Meter AM Frequencies [EMAIL PROTECTED] writes: just changing four of the xtals in the xtal synth circuit and ending up with 23 channels in the 10 meter band. In my Robyn T-123B 23-channel tube-type crystal-mixing type CB, I changed the first two A oscillator crystals to 25.325 and 25.385 MHz and ended up with channels 1 thru 8 as follows: 29.000 MHz 29.010 29.020 29.040 29.060 29.070 29.080 29.100 MHz There is good info on these rigs at CBC International's website http://www.cbcintl.com/ under Crystal Mixing Charts. For my specific rig look at http://www.cbcintl.com/XTALS/AM%2014950-23290-11275-11730.pdf Steve WD8DAS [EMAIL PROTECTED]
Re: [AMRadio] 10 Meter AM Frequencies
Has anyone made this modification to an old Lafayette Comstat 25? I have a couple of those I've been wanting to convert to 10 meters. Rick/K5IZ Peter Markavage wrote: Personally, since the demand for the Courier Royale is high among CB collectors, I would sell that rig, Ebay or whatever. $75 to $150 is not uncommon for that rig. Take the proceeds and buy several cheap CB's that you can diddle with, steal parts, etc. or get a used Uniden HR-2510 or 2600. Pete, wa2cwa
RE: [AMRadio] 10 Meter AM Frequencies
Pete, wa2cwa wrote: Personally, since the demand for the Courier Royale is high among CB collectors, I would sell that rig, Ebay or whatever. $75 to $150 is not uncommon for that rig. That is true. However, I have a sentimental attachment to the Royale. I kept myself from starving back in the early 70's by fixing CBs by the side of the interstate in Texas. I liked working on the tube sets, and the Courier line was my favorite. I also have an old Browning Eagle (R27/S23) that I plan to put on 10 meters AM as well. That should be fun CQ CQ CQ from K4MO ping!!. Actually, I will put a switch in it so it won't ping every time ... only when I want to really annoy someone. ;-) Theo K4MO
RE: [AMRadio] 10 Meter AM Frequencies
Hmmm ... make the ping first, then audio . Jeeze you think I would remember better than that. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Theo Bellamy Sent: Tuesday, April 04, 2006 11:59 AM To: Discussion of AM Radio Subject: RE: [AMRadio] 10 Meter AM Frequencies Pete, wa2cwa wrote: Personally, since the demand for the Courier Royale is high among CB collectors, I would sell that rig, Ebay or whatever. $75 to $150 is not uncommon for that rig. That is true. However, I have a sentimental attachment to the Royale. I kept myself from starving back in the early 70's by fixing CBs by the side of the interstate in Texas. I liked working on the tube sets, and the Courier line was my favorite. I also have an old Browning Eagle (R27/S23) that I plan to put on 10 meters AM as well. That should be fun CQ CQ CQ from K4MO ping!!. Actually, I will put a switch in it so it won't ping every time ... only when I want to really annoy someone. ;-) Theo K4MO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] 10 Meter AM Frequencies
In addition if you're interested in knowing if the band is open, don't forget to tune through the beacon portion of the band approx 28200 - 28300. 73, Mark W1EOF -Original Message- From: Rev. Don Sanders [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 04, 2006 10:46 AM To: Discussion of AM Radio Subject: Re: [AMRadio] 10 Meter AM Frequencies SNIP Much of the QRp activity on 10 was on 29.060 in years past. I often monitor 29.060 but don't hear much Others monitor 29.00. Healthfully yours, DON W4BWS -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/300 - Release Date: 4/3/06
Re: [AMRadio] 10 Meter AM Frequencies
I'm somewhat intrigued with converting a CB radio to 10 meters from the pure technical perspective, but the typical 4 watts AM power leaves a LOT to be desired. Am I missing something here? I have a Radio Shack HTX-10 that does 7 watts AM but is more respectable on FM and SSB at 25 watts. I have a Pace Sidetalk 1000B that I could use but it is a well featured radio with built in SWR/power meter, clock/power off timer, noise blanking, and of course SSB. The SSB is what would be attractive for conversion but I hate to butcher a nice radio. On the other hand I have an old JC Penney 23 channel radio or a Realistic TRC-430 40 channel radio(not sure if this can be done with a 1 crystal/PLL scheme) that I could use for AM and wouldn't mind diddling with but again, to what end other than the fun of it which is ok in itself I guess? Tom K3TVC
RE: [AMRadio] 10 Meter AM Frequencies
I have a modern galaxy dx 99v or something like that. Its 'supposed' to be for 10 meters, does am, fm, ssb, at about 10 watts out on am. Its set up for CB on one of the 8 bands, has a freq counter built in, and the roger beep and other CB must haves. By changing a crystal, you can get it to cover cb and the higher 10 meter frequencies, but I never got the crystal as its some weird frequency. As it is, I think it goes from 25.2 to 28.8 I got it when I went down to New Orleans after the storm, it was great to do CB down south on the hiways, the north east is just a CB mess. I should sell it on Ebay, I paid over $300.00 and would be happy to get $150.00 for it. If anyone here is interested, let me know, otherwise I should see if I can undo the CB mod and find out what the frequency range is. Not much use for CB in New Jersey Brett N2DTS
Re: [AMRadio] 10 Meter AM Frequencies
y'all got to remember that when ten is open, 5 watts can work the world. I'm reminded of a time years ago when 4 of us here in shreveport were talking on ten meters and kept getting interrupted by others. We all turned our drive down as far as it would go. I had virtually no deflection from my wattmeter. Suddenly, a fellow in Tucson broke in and said hey I can still hear you guys LOL 4 years ago when propogation was still decent, I worked 13 european countries on ten am with a barefoot ranger. you just don't need a great deal of power to make good contacts on ten meters Ronnie - W5SUM -- Original Message --- From: [EMAIL PROTECTED] [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Tue, 4 Apr 2006 13:48:12 -0400 Subject: Re: [AMRadio] 10 Meter AM Frequencies I'm somewhat intrigued with converting a CB radio to 10 meters from the pure technical perspective, but the typical 4 watts AM power leaves a LOT to be desired. Am I missing something here? I have a Radio Shack HTX-10 that does 7 watts AM but is more respectable on FM and SSB at 25 watts. I have a Pace Sidetalk 1000B that I could use but it is a well featured radio with built in SWR/power meter, clock/power off timer, noise blanking, and of course SSB. The SSB is what would be attractive for conversion but I hate to butcher a nice radio. On the other hand I have an old JC Penney 23 channel radio or a Realistic TRC-430 40 channel radio(not sure if this can be done with a 1 crystal/PLL scheme) that I could use for AM and wouldn't mind diddling with but again, to what end other than the fun of it which is ok in itself I guess? Tom K3TVC __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb --- End of Original Message ---
Re: [AMRadio] 10 Meter AM Frequencies
Ronnie Hull wrote: y'all got to remember that when ten is open, 5 watts can work the world. About five years ago, or so, I worked a VK on 28.4 Mhz with a QRP rig running about 7W PEP, from my mobile (running a Larson NMO-34 with 60 whip). That little rig is a portable. handie-talkie-style rig, that runs AM, FM, and SSB, and nominally operates the entire 10M band.It tunes similarly to a 2510. There is a mod to put it on CB (actually 26 - 30 Mhz), but who cares about that. It cost me $149.95 (US) and was a bargain.
RE: [AMRadio] 10 Meter AM Frequencies
Boy that's the truth. A few years back I had my HTX-100 in the car. With that 25W I worked the world. Doesn't take much power at all. 73, Mark W1EOF -Original Message- From: ronnie.hull [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 04, 2006 2:30 PM To: Discussion of AM Radio Subject: Re: [AMRadio] 10 Meter AM Frequencies SNIP 4 years ago when propogation was still decent, I worked 13 european countries on ten am with a barefoot ranger. you just don't need a great deal of power to make good contacts on ten meters Ronnie - W5SUM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/300 - Release Date: 4/3/06
Re: [AMRadio] 10 Meter AM Frequencies
The channelized conversion can be found in old 73 magazine articles called CB to TEN from the mid seventies. I would not use those ,instead a good choice of frequencies would be 29.000, 29.025and 29.050 email me off lost with the radio model you are considering for the conversion I have done quite a few and may have some tips. 73 Steve WB5UGT - Original Message - From: Theo Bellamy [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Monday, April 03, 2006 8:49 AM Subject: [AMRadio] 10 Meter AM Frequencies I seem to remember that about 20 years ago some folks were converting 23 channel CB rigs to use on 10 meters (by legal hams, of course). I think they were just changing four of the xtals in the xtal synth circuit and ending up with 23 channels in the 10 meter band. At the time I think there was some sort of agreed upon scheme so everyone was ending up on the same 23 frequencies. Does anyone know what these are? If not, what would be a good choice of frequencies for such a conversion? I have an old antique tube type CB rig I want to put on 10 meters. Thanks 73, Theo K4MO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] 10 Meter AM Frequencies
From: Theo Bellamy I seem to remember that about 20 years ago some folks were converting 23 channel CB rigs to use on 10 meters (by legal hams, of course). I think they were just changing four of the xtals in the xtal synth circuit and ending up with 23 channels in the 10 meter band. At the time I think there was some sort of agreed upon scheme so everyone was ending up on the same 23 frequencies. Does anyone know what these are? I sure don't know, but it was written up in the QST magazine with conversion articles. Should have been in the late seventies. I might find it accidently, but have no clue where to look right now. Mike - Original Message -
Re: [AMRadio] 10 Meter AM Frequencies
[EMAIL PROTECTED] writes: just changing four of the xtals in the xtal synth circuit and ending up with 23 channels in the 10 meter band. In my Robyn T-123B 23-channel tube-type crystal-mixing type CB, I changed the first two A oscillator crystals to 25.325 and 25.385 MHz and ended up with channels 1 thru 8 as follows: 29.000 MHz 29.010 29.020 29.040 29.060 29.070 29.080 29.100 MHz There is good info on these rigs at CBC International's website http://www.cbcintl.com/ under Crystal Mixing Charts. For my specific rig look at http://www.cbcintl.com/XTALS/AM%2014950-23290-11275-11730.pdf Steve WD8DAS [EMAIL PROTECTED]
Re: [AMRadio] 10 Meter AM Frequencies
Theo: There once was a plan to move the CB set up exactly 2.0 MHz from the Channel 1 CB Frequency (26.965) which means that the converted set would be on 28.965 for channel 1 etc. I never heard much activity there so I started making Channel 1 start at 29.0 MHz where there is a much better chance of making a contact, just in my opinion of course. Good Luck. 73 DE Charlie, K0NG
