Re: [AMRadio] Recent insulting threads
On Jan 20, 2008 12:53 PM, A.R.S. - WA5AM [EMAIL PROTECTED] wrote: What the hell is wrong here people? Is it the elections? Winter? Sidebanders? What? Heh, maybe a bit of all three Brian, plus the lack of on air time? Cabin Fever could be seen as a cause as easily as all the political crap on the TV, radio, online, and so on. Sidebanders, wellthis gets back to the 'bad apples in every walk of life' comment, so maybe less likely. The original point (how we choose to represent amateur radio, basically) is a good one. It warrants some scrutiny if we wish to showcase amateur radio in general, and AM specifically to upcoming generations. Pointing out the obvious should be simple enough without resorting to doing so in an elitist or antagonistic way. In the end, people are free to live their lives as they choose, regardless of how ridiculous or repulsive we might find it. I prefer to blame the free choice folks make to live their lives online instead of getting on the air to actually operate, promote, and enjoy amateur radio. A recent discussion on 80 meters highlighted how so many who have all the answers both here and on AMfone mysteriously never seem to be heard on the air. IMO, that's where the problem lies: the disconnect between talking about it and actually doing it. But then again, you know what they say about opinions (o: ~ Todd, KA1KAQ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Recent threads
You should never assume that because you don't hear them on the air, that people here and on AMfone aren't on the air. There's a lot more to ham radio then just working 80 meter AM! Pete, wa2cwa http://www.manualman.com On Tue, 22 Jan 2008 09:48:58 -0500 Todd, KA1KAQ [EMAIL PROTECTED] writes: I prefer to blame the free choice folks make to live their lives online instead of getting on the air to actually operate, promote, and enjoy amateur radio. A recent discussion on 80 meters highlighted how so many who have all the answers both here and on AMfone mysteriously never seem to be heard on the air. IMO, that's where the problem lies: the disconnect between talking about it and actually doing it. But then again, you know what they say about opinions (o: ~ Todd, KA1KAQ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Recent insulting threads
I remember back in the 60's, there was an old guy in California that raged every day about side banders what a bunch of commies they were. He was a big pain in the patoot. - Original Message - From: Todd, KA1KAQ [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, January 22, 2008 5:48 AM Subject: Re: [AMRadio] Recent insulting threads On Jan 20, 2008 12:53 PM, A.R.S. - WA5AM [EMAIL PROTECTED] wrote: What the hell is wrong here people? Is it the elections? Winter? Sidebanders? What? Heh, maybe a bit of all three Brian, plus the lack of on air time? Cabin Fever could be seen as a cause as easily as all the political crap on the TV, radio, online, and so on. Sidebanders, wellthis gets back to the 'bad apples in every walk of life' comment, so maybe less likely. The original point (how we choose to represent amateur radio, basically) is a good one. It warrants some scrutiny if we wish to showcase amateur radio in general, and AM specifically to upcoming generations. Pointing out the obvious should be simple enough without resorting to doing so in an elitist or antagonistic way. In the end, people are free to live their lives as they choose, regardless of how ridiculous or repulsive we might find it. I prefer to blame the free choice folks make to live their lives online instead of getting on the air to actually operate, promote, and enjoy amateur radio. A recent discussion on 80 meters highlighted how so many who have all the answers both here and on AMfone mysteriously never seem to be heard on the air. IMO, that's where the problem lies: the disconnect between talking about it and actually doing it. But then again, you know what they say about opinions (o: ~ Todd, KA1KAQ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.9/1237 - Release Date: 1/22/2008 11:04 AM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Recent threads
On Jan 22, 2008 1:40 PM, Peter Markavage [EMAIL PROTECTED] wrote: You should never assume that because you don't hear them on the air, that people here and on AMfone aren't on the air. I never assume anything, Pete. You of all people should know that, and should know why. (o: As well as 80 meters, I keep receivers listening on 40, 160, and other bands when conditions permit. Most weekends the Clegg stations are monitoring 2 6 also, to no avail. My statements are based on what stations I can hear on a net night or corntest weekend as well as calls seen online, who don't seem to appear otherwise. There's a lot more to ham radio then just working 80 meter AM! I'd go even further Pete, and say that there's even more to promoting and preserving amateur radio than simply enjoying it, but you gotta start somewhere. Getting people on the air more and online less (at least with respect to ham radio) would, in my opinion, be a step in the right direction. Fact of the matter is, plenty of folks piss and moan, fewer actually 'do'. The internet just makes it that much easier. Voting is a perfect example. ~ Todd, KA1KAQ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] 75A-2 project
The project to restore my old Collins 75A--2 receiver has gone very well. After replacing the paper/wax caps, the filter caps, checking and replacing the weak tubes, cleaning the sockets and controls, and replacing quite a few failed (due to corrosion) front end trimmer capacitors, and a by-the-book alignment, the unit meets or exceeds original specs. The widest bandwidth is 4 kHz (crystal filter out, just the tuned circuits in the IF stages) and I would like to add the capability for a wider choice for Hi-Fi AM reception. Anyone know of any articles on such a modification? Maybe in the context of updating the 75A-2 or 3 to mechanical filters? Or have any of your own ideas? I'm thinking perhaps I could replace the back-to-back IF transformers with a 10 kHz BW 455 kHz ceramic filter I have here, but I'm not sure about the issues of impedance matching into and out of the filter, which was designed for low-Z solid-state circuits I'm sure. Or maybe I could increase the values of the small caps coupling the top of the primaries to the top of the secondaries. But that would be hard to switch in/out. A block diagram of the 75A-2 can be seen at http://www.wd8das.net/Collins/75A-2blockDia.pdf and a schematic is posted at http://www.wd8das.net/Collins/75A-2schematic.pdf Thanks... Steve WD8DAS [EMAIL PROTECTED] http://www.wd8das.net/ Radio is your best entertainment value. More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Recent insulting threads
That was Fred Huntley, W6RNC. He at one time sought to have American hams sign off with the national anthem. Joe W4AAB - Original Message - From: [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, January 22, 2008 1:02 PM Subject: Re: [AMRadio] Recent insulting threads I remember back in the 60's, there was an old guy in California that raged every day about side banders what a bunch of commies they were. He was a big pain in the patoot. - Original Message - From: Todd, KA1KAQ [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, January 22, 2008 5:48 AM Subject: Re: [AMRadio] Recent insulting threads On Jan 20, 2008 12:53 PM, A.R.S. - WA5AM [EMAIL PROTECTED] wrote: What the hell is wrong here people? Is it the elections? Winter? Sidebanders? What? Heh, maybe a bit of all three Brian, plus the lack of on air time? Cabin Fever could be seen as a cause as easily as all the political crap on the TV, radio, online, and so on. Sidebanders, wellthis gets back to the 'bad apples in every walk of life' comment, so maybe less likely. The original point (how we choose to represent amateur radio, basically) is a good one. It warrants some scrutiny if we wish to showcase amateur radio in general, and AM specifically to upcoming generations. Pointing out the obvious should be simple enough without resorting to doing so in an elitist or antagonistic way. In the end, people are free to live their lives as they choose, regardless of how ridiculous or repulsive we might find it. I prefer to blame the free choice folks make to live their lives online instead of getting on the air to actually operate, promote, and enjoy amateur radio. A recent discussion on 80 meters highlighted how so many who have all the answers both here and on AMfone mysteriously never seem to be heard on the air. IMO, that's where the problem lies: the disconnect between talking about it and actually doing it. But then again, you know what they say about opinions (o: ~ Todd, KA1KAQ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.9/1237 - Release Date: 1/22/2008 11:04 AM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Recent insulting threads
Wasn't he the guy that wrote the article in ER about the 'Kelvinator Kilowatt'?? Mod-U-Lator, Mike(y) W3SLK That was Fred Huntley, W6RNC. He at one time sought to have American hams sign off with the national anthem. Joe W4AAB __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Re: GB 75A-2 project
Good idea on the swamping resistors... I did confirm that mine did not have the values for narrow bandwidth. Another list member pointed out early and late-model 75A-2s had different bandwidth performance (early favoring AM), so perhaps different values were used. Steve WD8DAS [EMAIL PROTECTED] http://www.wd8das.net/ Radio is your best entertainment value. -Original Message- From: Glen Zook [EMAIL PROTECTED] To: [EMAIL PROTECTED]; amradio@mailman.qth.net; [EMAIL PROTECTED] Sent: Tue, 22 Jan 2008 7:27 pm Subject: Re: GB 75A-2 project To widen out the bandwidth you can put additional fairly low value resistors across the i.f. cans. If you look in the manual you will see a note to remove the swamping resistors to narrow the bandwidth. Therefore, adding resistors in parallel with the existing resistors should broaden the bandwidth. Glen, K9STH --- [EMAIL PROTECTED] wrote: The widest bandwidth is 4 kHz (crystal filter out, just the tuned circuits in the IF stages) and I would like to add the capability for a wider choice for Hi-Fi AM reception. Anyone know of any articles on such a modification? Maybe in the context of updating the 75A-2 or 3 to mechanical filters? Or have any of your own ideas? Glen, K9STH Website: http://k9sth.com _ ___ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Re: GB 75A-2 project
I did try this on the bench but the loss in gain seemed pretty severe for the modest bandwidth improvement I could get. Maybe with a more methodical approach I could make it work. Steve WD8DAS [EMAIL PROTECTED] http://www.wd8das.net/ Radio is your best entertainment value. -Original Message- From: Jim Wiley [EMAIL PROTECTED] To: amradio@mailman.qth.net; [EMAIL PROTECTED] Sent: Tue, 22 Jan 2008 10:49 pm Subject: Re: GB 75A-2 project It might be possible to stagger tune the IF stages to increase bandwidth. Use of a sweep generator (or a manually swept signal generator) will let you know how you are doing when trying this. As a general rule, you can trade gain and selectivity for increased bandwidth. You might be able to get as much as a doubling of the IF bandwidth by this method. I am not familiar with the 75A-2, but if it includes more than one IF transformer between the IF amplifier stages, it would be a excellent candidate for this modification. I have a 51J-3, but the two might not use the same design inside the IF section. With luck, the 75A-2's IF system might have some excess gain that you could sacrifice to get more bandwidth. Might be worth a try, at least. The advantage here is that this is a non-intrusive modification - in other words, easily reversible, requiring no component changes, extra parts, etc. Lacking a sweep or signal generator, you could experimentally try turning the IF transformer slugs or capacitors a bit each way (keep track of the original positions!!) to see if it gives you what you want. If the trimmer capacitors or slugs are the multi-turn type, then they can probably be detuned a full turn or more without losing too much gain. Try small steps, such as a 1/4 or 1/2 turn at first. Half-turn trimmer caps are more difficult, and you will probably need to use a series of pencil marks on the can to try and get fractional turn indicators. There are fancier ways to do this, such as by using double tuned circuits and/or over-coupling, but then you are into the realm of parts changes and not so easy to reverse modifications. YMMV - Jim, KL7CC The Glowbugs E-mail List Website is: *** *** http://www.mines.uidaho.edu/~glowbugs/ ** *** Send subscribe and unsubscribe requests to this address: ** [EMAIL PROTECTED] ** Steve WD8DAS [EMAIL PROTECTED] http://www.wd8das.net/ Radio is your best entertainment value. -Original Message- From: Jim Wiley [EMAIL PROTECTED] To: amradio@mailman.qth.net; [EMAIL PROTECTED] Sent: Tue, 22 Jan 2008 10:49 pm Subject: Re: GB 75A-2 project It might be possible to stagger tune the IF stages to increase bandwidth. Use of a sweep generator (or a manually swept signal generator) will let you know how you are doing when trying this. As a general rule, you can trade gain and selectivity for increased bandwidth. You might be able to get as much as a doubling of the IF bandwidth by this method. I am not familiar with the 75A-2, but if it includes more than one IF transformer between the IF amplifier stages, it would be a excellent candidate for this modification. I have a 51J-3, but the two might not use the same design inside the IF section. With luck, the 75A-2's IF system might have some excess gain that you could sacrifice to get more bandwidth. Might be worth a try, at least. The advantage here is that this is a non-intrusive modification - in other words, easily reversible, requiring no component changes, extra parts, etc. Lacking a sweep or signal generator, you could experimentally try turning the IF transformer slugs or capacitors a bit each way (keep track of the original positions!!) to see if it gives you what you want. If the trimmer capacitors or slugs are the multi-turn type, then they can probably be detuned a full turn or more without losing too much gain. Try small steps, such as a 1/4 or 1/2 turn at first. Half-turn trimmer caps are more difficult, and you will probably need to use a series of pencil marks on the can to try and get fractional turn indicators. There are fancier ways to do this, such as by using double tuned circuits and/or over-coupling, but then you are into the realm of parts changes and not so easy to reverse modifications. YMMV - Jim, KL7CC The Glowbugs E-mail List Website is: *** *** http://www.mines.uidaho.edu/~glowbugs/ ** *** Send subscribe and unsubscribe requests to this address: ** [EMAIL PROTECTED] ** More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com
