Re: [AMRadio] Don't forget 10 Meters
From my QTH in Central Virginia, I worked via 10m into CT and Dallas-Fort Worth last week during lunchtime while in the mobile. Condx finally starting to improve. 73, Mark Cobbeldick, KB4CVN Monroe, VA FM07jo Message: 1 Date: Sat, 21 May 2005 09:16:34 -0500 From: Mike Duke, K5XU [EMAIL PROTECTED] Subject: [AMRadio] Don't forget 10 Meters To: Discussion of AM Radio amradio@mailman.qth.net The 10 meter E season has begun. On Thursday and Friday of this week, I made an AM contact each day near 6 PM on 29.0 with my HTX10. Yesterday, I heard 3 other AM stations, but had a dinner engagement, and was unable to stay near the rig. Remember to check 29.0 often during the summer E season. Don't just listen; occasionally identify or call cq. If we all only listen, we'll all hear nothing. Also remember that if 10 is open even marginly, 15 will also be open. See you on the bands. Mike Duke, K5XU American Council of Blind Radio Amateurs __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[AMRadio] Natinal Radio coils
Can anyone identify national radio coils,# 61,62,63,64, 65. Thanks
Re: [AMRadio] Don't forget 10 Meters
Look around for a Lafayette HA-250 tube amp to run AM with. I have one that I use, and it works FB.Glad to hear 10m AM is active. Joe W4AAB Mark Bell writes: I purchased a used HTX-10 and am looing forward to some lunchtime 10M fun, though 7W AM will be a bit challanging. 15M wasn't too active Sunday afternoon, but I managed a nice cross mode chat will a fellow in Chicago. He made an interesting comment -- he found that when he calls SSB stations on AM, it's iffy if they'll respond. Whereas when he calls AM stations on SSB, they always respond. Nice compliment to the AM gang. 73 Mark K3MSB - Original Message - From: Mark Cobbeldick [KB4CVN] Home [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, May 23, 2005 9:15 AM Subject: Re: [AMRadio] Don't forget 10 Meters From my QTH in Central Virginia, I worked via 10m into CT and Dallas-Fort Worth last week during lunchtime while in the mobile. Condx finally starting to improve. 73, Mark Cobbeldick, KB4CVN Monroe, VA FM07jo Message: 1 Date: Sat, 21 May 2005 09:16:34 -0500 From: Mike Duke, K5XU [EMAIL PROTECTED] Subject: [AMRadio] Don't forget 10 Meters To: Discussion of AM Radio amradio@mailman.qth.net The 10 meter E season has begun. On Thursday and Friday of this week, I made an AM contact each day near 6 PM on 29.0 with my HTX10. Yesterday, I heard 3 other AM stations, but had a dinner engagement, and was unable to stay near the rig. Remember to check 29.0 often during the summer E season. Don't just listen; occasionally identify or call cq. If we all only listen, we'll all hear nothing. Also remember that if 10 is open even marginly, 15 will also be open. See you on the bands. Mike Duke, K5XU American Council of Blind Radio Amateurs __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] sweeping the audio on TX test
The EQ for sale made me think of this: How many of us, when we tweek ye olde voice transmitter, sweep the entire audio spectrum (or as much as will fit through the iron) to check flatness of frequency response and audio distortion? To me, the audio part of the hobby is as important as the RF part. PJ
RE: [AMRadio] sweeping the audio on TX test
That is true for me as well PJ, But, the design or tuning of an AM rig is still more that taking a CW rig and plate modulating it, which is what I once thought in my younger days. The RF section must modulate linearly. If Plate modulation is used then basically the RF Voltage output should follow the Plate voltage and typically the plate current should follow the plate voltage. The plate efficiency should be the same value for all plate voltages within the modulation voltage range. I'm just throwing some stuff around to get a discussion going. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Patrick Jankowiak Sent: Monday, May 23, 2005 7:03 PM To: amradio@mailman.qth.net Subject: [AMRadio] sweeping the audio on TX test The EQ for sale made me think of this: How many of us, when we tweek ye olde voice transmitter, sweep the entire audio spectrum (or as much as will fit through the iron) to check flatness of frequency response and audio distortion? To me, the audio part of the hobby is as important as the RF part. PJ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] AMPS for LP 10 Meter Rigss
I've seen one or two of the Lafayette HA250 amps on Ebay over the past year or so. Another possibility is the Knight TL175 which also shows up occasionally. If anybody will admit to having one, the old Sonar BR21 should also work well as long as you watch the drive level. Okay, so, that dates the time of my pre-ham radio activity! To their credit, the FCC has made Ebay be more careful of amplifier sales, so you don't see nearly as much of the CB trash amps there as was once the case. I'm sure some are there disguised one way or another. For the ambitious builder, when the novice power level was raised to the 250 watt level, there was a sweep tube linear in QST and in a few editions of the Handbook. I think it was in the late 70s or early 80s, and ran a pair of 6kd6 tubes. I was running a Yaesu FT7 at the time, and considered getting a friend to help me build one, but we never got around to it. Mike Duke, K5XU American Council of Blind Radio Amateurs
[AMRadio] LP AM on 10 or 15 Meters
The HTX10, a converted CB rig, etc, will make many good contacts. Of course, with heavy qsb or poor band conditions, you will lose a seemingly disproportionant number of contacts. However, if low power is all you have for 10 meter AM, QRP certainly beats QRT! While one doesn't often find CB rigs converted to 15 meters any more, low power works very well there too. So set the rice box for that 25 watt carrier output and get on the air! Mike Duke, K5XU American Council of Blind Radio Amateurs
Re: [AMRadio] AMPS for LP 10 Meter Rigss
I have a Knight T-175 and can send a copy of the smanual with schematic cheaply. I am reworking it for someone. I am trying to convert it to 6, as the only coil I had for it was 10m. I need the dimensions for the 6m coil.I modified the 10m coil but want the correct dimensions. Joe W4AAB - Original Message - From: Mike Duke, K5XU [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Monday, May 23, 2005 8:37 PM Subject: [AMRadio] AMPS for LP 10 Meter Rigss I've seen one or two of the Lafayette HA250 amps on Ebay over the past year or so. Another possibility is the Knight TL175 which also shows up occasionally. If anybody will admit to having one, the old Sonar BR21 should also work well as long as you watch the drive level. Okay, so, that dates the time of my pre-ham radio activity! To their credit, the FCC has made Ebay be more careful of amplifier sales, so you don't see nearly as much of the CB trash amps there as was once the case. I'm sure some are there disguised one way or another. For the ambitious builder, when the novice power level was raised to the 250 watt level, there was a sweep tube linear in QST and in a few editions of the Handbook. I think it was in the late 70s or early 80s, and ran a pair of 6kd6 tubes. I was running a Yaesu FT7 at the time, and considered getting a friend to help me build one, but we never got around to it. Mike Duke, K5XU American Council of Blind Radio Amateurs __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
