Re: [AMRadio] Clean schematic of the Gates BC-1T transmitter?
Steve, I was just going through the old emails and found this. Do you still need a better schematic of the BC-1T? I have the one with the 807s at my AM transmitter site. I might have a clean copy of the circuit. --- On Sun, 12/6/09, sbjohns...@aol.com sbjohns...@aol.com wrote: From: sbjohns...@aol.com sbjohns...@aol.com Subject: [AMRadio] Clean schematic of the Gates BC-1T transmitter? To: amradio@mailman.qth.net Date: Sunday, December 6, 2009, 3:26 PM Anyone have, or know a source for, a clean schematic of the Gates BC-1T transmitter? Mine is a blurry scan of a well-worn original. It is unfortunately the version with the 6BG6s, rather than the 807s. Thanks... Steve WD8DAS sbjohns...@aol.com Capital City Hamfest - Sat, Jan 23 - Madison, Wisconsin http://www.wd8das.net/hamfest __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[AMRadio] DX100 question
Is $100 a good going rate for a DX100 these days? I have a friend with one to sell me with little wrong with it, I'd rather enjoy fixing it anyway. My present AM/CW rig is a first rate DX-40 but I would like a little more power, high level modulation rig. Ken KC8QO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] DX100 question
Thanks, Steve I am going to take him upon it. Perhaps a QSO on 40 meters is in the future? Ken --- On Tue, 3/23/10, sbjohns...@aol.com sbjohns...@aol.com wrote: From: sbjohns...@aol.com sbjohns...@aol.com Subject: Re: [AMRadio] DX100 question To: amradio@mailman.qth.net Date: Tuesday, March 23, 2010, 1:11 AM That's a good price for a DX-100 in nice shape, Ken - I'd go for it quick. Steve WD8DAS sbjohns...@aol.com http://www.wd8das.net/ Radio is your best entertainment value. -Original Message- From: Ken Zuercher hepcatrevi...@yahoo.com To: AMRadio@mailman.qth.net Sent: Mon, Mar 22, 2010 11:18 pm Subject: [AMRadio] DX100 question Is $100 a good going rate for a DX100 these days? I have a friend with one to sell me with little wrong with it, I'd rather enjoy fixing it anyway. My present AM/CW rig is a first rate DX-40 but I would like a little more power, high level modulation rig. Ken KC8QO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] 2m AM
To All Back in the early 80s, most of us Broadcast Engineers here in Toledo were hams (those of us left still are). We started an informal Out to lunch club. We all bought Heath Twoers and put them on the air. We would meet semi regularly but it slowed down. We had on stipulation. One could spend no more than $20 on the whole setup! most uf us found Twoers cheap as no one wanted them then (probably still don't). The antennas were wire and wood beams or if you had a Ringo Ranger up it was OK. One of us even found an unbuilt kit and finished it. His worked better than mine as I only could get about a quarter watt out. We were spread out with a radius of about 20 miles. Reception was generally OK but we eventually lost interest or some of us moved away. I still have the Twoer. Does anyone ever use these in other parts of the country? Ken KC8QO --- On Wed, 7/29/09, Bry Carling bcarl...@cfl.rr.com wrote: From: Bry Carling bcarl...@cfl.rr.com Subject: [AMRadio] 2m AM To: AMRADIO amradio@mailman.qth.net Date: Wednesday, July 29, 2009, 9:39 PM The most popular spot for AM operation on 2m is 144.450 MHz in the USA. Part of the reason for this is the availability of crystal;s on and around 8025 kHz. Most hams who operated 2m AM for any length of time particuarly in the heyday of AM would possess a number of crystals ranging from just above 8000 kHz to about 8050 kHz. 73 - Brian Bry Carling, AF4K From: jon baker ad5...@yahoo.com Just got off the ARRL website, the band from 145.500 to 145.800 is listed as misc. and experimental modes. Seem AM would fit in here? Hmm, a pair of 6146's mod. by a pair?? Sounds fun!! Speaking of 2 meters, last weekend I built up a balanced- line tuner for 144Mhz, fired up the D.C. to Daylight Ricebox, and My first QSO was with Raphael(XE2OR) for real DX! I'm talking about loading up the same 80M. loop at 33 feet that I use on 75M. A.M.phone! Also talked to several Houston area Hams abt. 200 Mi. from here. Fire up those old Boatanchors, I'll listen in that band. 73 es CUL de AD5HR Jon __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[AMRadio] Another source for tubes and tubes related parts
Check our www.rutubes.com for caps, tube sockets etc. I haven't used them yet, but they were mentioned on a tube guitar amp discussion group. Read the news page for the translation, look under software. It's hilarious! Ken KC8QO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Tube Theremin
Steve, I have a manual for what I believe is the first commercially available Theremin made by RCA in the 1930's. It uses the same hetrodyning principal but uses some oddball transformers that would give us fits to replicate. I can try to scan the manual with schematic if you're interested. It is fascinating. Ken Zuercher KC8QO --- On Fri, 3/20/09, sbjohns...@aol.com sbjohns...@aol.com wrote: From: sbjohns...@aol.com sbjohns...@aol.com Subject: [AMRadio] Tube Theremin To: amradio@mailman.qth.net Date: Friday, March 20, 2009, 4:08 PM I've got a new sort-of AM project on the bench here now:? a tube Theremin.? This musical instrument produces sound by heterodyning two oscillators that run in the low-end of the broadcast band. I'd like to find three Miller 70-OSC coils or equivalent for this rig - anyone have some?? If you are interested in the circuit, I'm building upon the ideas of Doug Forbes that I found online.? See http://www.wd8das.net/theremin.gif and http://www.wd8das.net/theremin.txt Thanks... Steve WD8DAS sbjohns...@aol.com http://www.wd8das.net/ - Radio is your best entertainment value. - __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Tube Theremin
I went and found the book. I'll get it scanned at school (I'm now a music teacher) by this weekend so we can post it. It's funny to read the old style schematics. ken --- On Thu, 3/26/09, sbjohns...@aol.com sbjohns...@aol.com wrote: From: sbjohns...@aol.com sbjohns...@aol.com Subject: Re: [AMRadio] Tube Theremin To: amradio@mailman.qth.net Date: Thursday, March 26, 2009, 11:02 PM Ken, that sounds great. We could also post it online for others. Thanks... Steve WD8DAS sbjohns...@aol.com http://www.wd8das.net/ - Radio is your best entertainment value. - -Original Message- From: Ken Zuercher hepcatrevi...@yahoo.com To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Thu, 26 Mar 2009 8:36 pm Subject: Re: [AMRadio] Tube Theremin Steve, I have a manual for what I believe is the first commercially available Theremin made by RCA in the 1930's. It uses the same hetrodyning principal but uses some oddball transformers that would give us fits to replicate. I can try to scan the manual with schematic if you're interested. It is fascinating. Ken Zuercher KC8QO --- On Fri, 3/20/09, sbjohns...@aol.com sbjohns...@aol.com wrote: From: sbjohns...@aol.com sbjohns...@aol.com Subject: [AMRadio] Tube Theremin To: amradio@mailman.qth.net Date: Friday, March 20, 2009, 4:08 PM I've got a new sort-of AM project on the bench here now:? a tube Theremin.? This musical instrument produces sound by heterodyning two oscillators that run in the low-end of the broadcast band. I'd like to find three Miller 70-OSC coils or equivalent for this rig - anyone have some?? If you are interested in the circuit, I'm building upon the ideas of Doug Forbes that I found online.? See http://www.wd8das.net/theremin.gif and http://www.wd8das.net/theremin.txt Thanks... Steve WD8DAS sbjohns...@aol.com http://www.wd8das.net/ - Radio is your best entertainment value. - __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] 1 kw broadcast transmitter available
This is hilarious! I have to agree about CCA but a 1KW can' be all that bad. BTW, wouldn't the worst encounter be with Thor (the god of Thunder)? I can relate to all of the critters inside. Ken KC8QO --- On Wed, 2/11/09, BILL GUYGER bguy...@sbcglobal.net wrote: From: BILL GUYGER bguy...@sbcglobal.net Subject: Re: [AMRadio] 1 kw broadcast transmitter available To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Wednesday, February 11, 2009, 12:20 AM Jerry Like I posted earlier, I think I have a large size schematic for the thing left over from trying to resurrect one that had fried several too many times at KBST in Big Spring, Texas. May it rest in pieces. It had water damage, bird's nests, rodent damage, and far too many encounters with Zeus to make it worth saving. Not to mention snake skins inside.. Not to mention that the initials CCA are enough to give any broadcast engineer the willies. Bill AD5OL From: Charles Wooten NF4A n...@knology.net To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, February 10, 2009 8:47:37 PM Subject: Re: [AMRadio] 1 kw broadcast transmitter available The lucky guy who got the CCA 1000D is Jerry K9GOZif I come up with another one, I will subscribe to the list again. 73 Charlie NF4A Clear Channel Radio Panama City, FL__ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] 160 meter antenna
I would bet that the Skirt type antenna that you describe is actually a detuning system on a cellphone tower that is within two miles of a Directional AM Broadcast array. If the Cell tower is within the two mile range, the company who owns it must have a partial proof of performance done on the AM directional array before and after the tower is built. If it is shown to distort the pattern, then the detuning network that you see is added and tuned to make the cell tower invisible electrically to the AM array at the broadcast frequency. It actually is an untenna I guess. Ken Zuercher KC8QO --- On Mon, 1/12/09, robertchar...@att.net robertchar...@att.net wrote: From: robertchar...@att.net robertchar...@att.net Subject: Re: [AMRadio] 160 meter antenna To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Monday, January 12, 2009, 3:36 PM Bill, I wasn't aware the broadcast towers were sitting atop of a insulator on the base...is this considered the norm? What type of material would you suppose the insulator is made with? -- Original message from BILL GUYGER bguy...@sbcglobal.net: -- This is a skirt type antenna it's a fairly common trick used at some AM b'cast sites. This way the tower can be grounded rather than sitting on a base insulator. Bill AD5OL From: robertchar...@att.net To: w...@verizon.net; Discussion of AM Radio in the Amateur Service Sent: Monday, January 12, 2009 12:13:42 PM Subject: Re: [AMRadio] 160 meter antenna Hello Jack. I am familiar with the lynards that the climbers use as a safety line while climbing the tower. Their are however 3 vertical lines made out of what looks like guy wire with a circular ring near the base being fed by a box at the base. Just a FYI -- Original message from JACK C. SHUTT : -- Hi Robert, We have several of those wireless towers and monopoles around here, as well Those side wires are safety cables that climbers can clip on to with fall-arresting lanyards and harnesses, they are not radiators. Anyway, the folded unipole is a worthwhile antenna to try. I have had excellent results with an inverted L running up the side of my 80' tower and the horizontal portion sloping out to a tree. The L' perhaps looks more like a vee with one short leg. Total length is about 135 ft. I use a coil and capacitor parallel network at the base of the tower feeding the end of the antenna wire then coax back to the shack. As always, a good radial system really helps. 73, Jack, W9GT --- On Mon, 1/12/09, robertchar...@att.net wrote: From: robertchar...@att.net Subject: Re: [AMRadio] 160 meter antenna To: cozy...@yahoo.com, Discussion of AM Radio in the Amateur Service Date: Monday, January 12, 2009, 7:23 AM Neal. Thanks for the link on building the Unipole. I had worked for Sprint for some time and I noticed they were using that same concept on many of their towers. The link was exceptionally helpful -- Original message from neal Newman : -- Jim you only need 50 feet of verticle space. why not just build yourself a Folded Unipole antenna if you Dont know how. Ask. its really easy. Just Run 3 lengths of #12 wire or if you have it #6 wire. short them up at around the 50 foot point and use 1 PVC Tubing as Insulators with clamps Down the side of the Tower. at the bottom Each wire is isolated with PVC from the Tower. BTW Each wire should be about 12 or more off the tower. then Tie all 3 wires together with a ring of #12 and take that as the Lead to the antenna tuner. Run at Least 4 ground radials 50 feet long If you can get the space make them 120 feet... and you will have a Killer 160 antenna. if not make an inverted L Run a wire thats 130 feet long. as far vertically as you can then run the rest out horizontally... again you need at least 4 ground radials the unipole is what we use for Broadcast stations when we are tight for height or space on a grounded Tower. Neal-KA2CAF CE- WTTM/WHWH/WJDM/WIBG/WFYL --- On Sun, 1/11/09, Jim Miller WB5OXQ in Waco wrote: From: Jim Miller WB5OXQ in Waco Subject: [AMRadio] 160 meter antenna To: Discussion of AM Radio in the Amateur Service Date: Sunday, January 11, 2009, 11:28 PM I always wanted to try am on 160 but like most do not have enough room for a full size antenna, so, I am considering building a 160 meter antenna at our clubhouse because there is a 80' tower there and over an acre of land to spread out a 1/2 wave dipole. Question is; 1 Is a 1/2 wave wire dipole the best antenna for the band considering there is room for it. 2 Is 80' high enough for the center
Re: [AMRadio] FW: Heath Apache symptoms
I realize that some people have already conquered the Apachie and are on to fry bigger fish (You'd better have a strong back!) but it seems to me that this reflector is just the place for sharing experiences regarding Apachie repair, even if somewhat redundant. Some of us haven't been there yet. Put the posts up for all of us. It's more interesting than reading complaints about the ARRL. Ken, KC8QO --- On Thu, 1/8/09, AAR7IR aar...@hotmail.com wrote: From: AAR7IR aar...@hotmail.com Subject: Re: [AMRadio] FW: Heath Apache symptoms To: geo...@bud-jones-insurance-agency.com, Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Thursday, January 8, 2009, 7:00 PM I would very much like to be included in these Apache postings as well. --... ...-- John, WAØSTX/4 - Original Message - From: George Brand geor...@i2k.net To: amradio@mailman.qth.net Sent: Wednesday, January 07, 2009 11:23 AM Subject: [AMRadio] FW: Heath Apache symptoms Amen John! When I first bought a DX-100 at a swap, I took it to work and carried it up two flights to the workshop. (worked for a radio station) Got it up there and thought dang, I must be getting old 'er something Sat down, put feet up to read to my horror the !...@#$%^*() weighed 100 lbs soaking wet. I had the freight elevator take it down... As the owner of two Apaches, I'd like to see the answers posted to the list George wa8sco - I am not as strong as I was when I became a Novice over 50 years ago. Before you laugh, let me say that if you are LUCKY, maybe you will live to get WEAK!! Hi!! HI!! Thanks in advance and 73, John, K5PGW __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 amradio-requ...@mailman.qth.net with the word unsubscribe in the message body.
Re: [AMRadio] AM on 160m
Jim, The more work you put into the antenna the better the payoff no matter what the transmitter. Truer words have never been spoken! My lot is 48X108ft. I do have a Hygain vertical and a MiniQuad that may get put back into service. I used to run QRP with the vertical on 80-10 meters with a Heath HW-8. I worked all over when conditions were fair to better. I also used the 75 meter half sloper to check in toa cw net every day. They could hear me so I guess it was oK. I'm negotiating with a friend here in Toledo to take custody of his DX-100. That should help on 75 AM. Have some splainin to do Lucy about the size of the stuff I am bringing into the house. Thanks for the advice and good conversation. Hope to meet you on the air some time. Ken --- Jim Wilhite [EMAIL PROTECTED] wrote: Hi Ken, How much space do you have? If your tower is 50-60 ft. could you possibly install an Inverted L? Say 55 ft vertical (the more the better) with the rest horizontal out to about 160-170 ft and the end as high as possible. Feed that with 50 ohm coax and use a series cap in the center of 100-300 pico farads. If you will do that, you will be able to tune the thing on all bands with a good tuner at the transmitter. The downside is that it will be a better antenna for long distant communications and not as good for distances out to 500 miles. I have 44 ft. vertical and the rest horizontal and it works on 160 both close in and at a distance (as many radials as you can put in). On 75 meters, however it is distance dependent. Close in stations are weak, stations out over 500 miles do well. As for power, the DX 40 will have trouble on 160 and 75 on AM in the evening. However on 40 and above you will make adequate contacts. On CW you will do fine on 75-10 and ok on 160. I have a 40/75 meter dipole (the poles support the ends as high as the center), the inverted L plus a 5 band beam for the upper bands. I find the L works fine on the upper bands. For transmitters I use a BW 5100B for SSB, a BW 5100 , Globe Champion 300A and a Globe King 500A. On the upper bands, power is not that important, but on 75, especially at night, it is. CW is much more forgiving than AM so take that into consideration. The more work you put into the antenna the better the payoff no matter what the transmitter. 73 Jim/W5JO - Original Message - From: Ken Zuercher Jim, If I had a little more land, I'd put up dipoles also. I am however using half slopers on 40,20, and 10 meters. the longest is only 32 feet. The 40 meter unit tunes well on 15 also. i haven't worked anyone on 15 as I haven't been around when the band is open. I am just about able to put up a 75 meter half sloper to a point on a tree from the tower. What do you use to tickle the dipoles? I have a Heath DX-40 which is more than enough for any cw contact but I haven't done more than test on AM. Do you think the higher bands will go with the lower power on AM? Thanks for the advice in advance! Ken KC8QO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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] AM on 160m
Jim, If I had a little more land, I'd put up dipoles also. I am however using half slopers on 40,20, and 10 meters. the longest is only 32 feet. The 40 meter unit tunes well on 15 also. i haven't worked anyone on 15 as I haven't been around when the band is open. I am just about able to put up a 75 meter half sloper to a point on a tree from the tower. What do you use to tickle the dipoles? I have a Heath DX-40 which is more than enough for any cw contact but I haven't done more than test on AM. Do you think the higher bands will go with the lower power on AM? Thanks for the advice in advance! Ken KC8QO --- Jim Wilhite [EMAIL PROTECTED] wrote: No cable where I have lived in the past 10 years. I have been in rural areas and there may be only two or three houses near me. No only that but we don't watch enough TV to put an antenna on the tower. My poles are used in conjunction with the tower to support dipoles. I like dipoles better than inverted Vees. Jim/W5JO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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] AM on 160m
Why don't you get cable like any intelligent person? (LOL) I don't have cable I use the 55 foot tower to hold up ham antennas and a good TV antenna, keeps my wife happy. My neighbors think i'm Amish (or just cheap). I am the latter. Ken, KC8QO --- Jim Wilhite [EMAIL PROTECTED] wrote: It is amazing what putting poles or towers in the air gather. Over the years I have moved several times and when I installed the tower neighbors all wanted to know what that thing at the top was. I finally wised up and told them it was just a special TV antenna so I could watch stations in the next state. The only person that didn't like that was the lady in New Mexico who said it ruined her view, even though it was not in her line of sight. Jim/W5JO - Original Message - From: Peter Markavage My neighbors love me (cough). For years they though my hobby was climbing up on my roof and sticking metal poles in the air. Pete, wa2cwa __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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] 6V6 vs. 6L6
Not to beat a dead horse, but a 6v6 used for audio can be replaced by a 6L6. The 6L6 has a lower plate resistance so an output transformer for a pair of 6V6s will support a pair of 6L6s as the 6V6 plate resistance is about 10K per pair where the 6L6 is about 5K per pair. I have put 6L6s in many Fender guitar amps to replace the 6V6s until I could get new tubes. No problem at all. They do sound different however. (I hope I described this right) Ken Zuercher, KC8QO --- Ed Sieb [EMAIL PROTECTED] wrote: Well now... You can replace a 6V6 with a 6L6, but not the other way 'round, since the plate voltages are higher for 6L6's. Same basing, different plate dissipation and power output. Ed, VA3ES __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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 Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ 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] Re: AMRadio Digest, Vol 47, Issue 45
Just to get my $.02 in, My first Amateur Radio Mentor was Homer, W8DIH in about 1960. Many of you might remember him on AM using an Eldico TX if I remember right. I became licensed in 1964 as WN8VIW. I then got interested in music and after about 1970, was fairly inactive until 1978 whem my second mentor, Elmer KU8B got me restarted. The moral of the story is I don't remember the term Elmer back then either but for me, Elmer could be Homer so either name isn't a good choice. BTW I'm having trouble typing this as I am laughing about being beaten with a Wouff Hong, whatever or whomever that is. Ken KC8QO --- Michael Mertes [EMAIL PROTECTED] wrote: OMG! I hope there is no one on this list that goes by this name, or you may have just offended someone in a very big way. Please think before you post. Mike --- jeremy-ca [EMAIL PROTECTED] wrote: I hate that name, I always get a vision of Elmer Fudd or some unwashed mountain hillbilly. Whoever thought it up should be strung up by the heels and beat with the Wouff Hong. Carl KM1H - Original Message - From: D. Chester [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Wednesday, December 19, 2007 4:08 PM Subject: [AMRadio] Re: AMRadio Digest, Vol 47, Issue 45 I just wish that dumb-sounding term elmer would go away for good. Don k4kyv = The term is part of our history. Why Kalifornicate our heritage? ROLYNN K7DFW Hello, Actually, the term elmer is something relatively new, and only recently has it come into any kind of common use. It was first used in a March 1971 QST article by Dave Newkirk: I have been licensed since 1959, first becoming interested via SWL'ing in 1953. I was very active in ham radio throughout the 1970's and 80's, but NEVER heard the term elmer until about 1980. It is at best a johnny-come-lately part of our history, associated with the brief influx of new amateurs that occurred as a spin-off of the CB boom that began in the mid-70's. What is the earliest verifiable reference anyone can find to the term, such as use or mention of it in an amateur radio magazine (excluding the Newkirk article) or a documented speech at a major ham radio event? Don k4kyv __ 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. Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping __ 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] 6CA7/EL34 replacements
I've had good luck with J J (tesla) tubes for output tubes, EL34 and EL84. I've had good luck with Sovtek preamp 12AX7s but not 6L6s. I use NOS that I have collected from various sources, especially hamfests. The Electro Harmonix 6L6s seem to be fine, I think that they are picked out Sovteks and the Groove Tubes 6L6s though expensive work well. I think that they are tested Sino or that they are making their own tubes now. There are new Gold Lion and Mullards now as someone is using their designs or even the original tooling. Some are reasonable in cost, some are only for audiofools with more money than sense.The Mullards are supposed to be good and not overpriced. i haven't tried them as I have some NOS units at home. Output tubes last for a few years with regular use, preamp tubes last me for many (10+) years with regular use. Ken Zuercher KC8QO --- jeremy-ca [EMAIL PROTECTED] wrote: My son uses a Koch guitar amp with Ruby EL-34B-STR tubes and they dont hold up well, another one shorted last week. What are the preferred brands? Searching the web gives a lot of conflicting info. Carl KM1H - Original Message - From: Ken Zuercher [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Friday, December 07, 2007 12:39 AM Subject: Re: [AMRadio] 6CA7/EL34 replacements I agree about the guitar shop. The Marshall amps use EL34 tubes and are pretty tough on them (like me, I'm a guitar player) I like the JJ tubes as they were the Tesla brand and are made in the Czech Republic. They also have a model with beautiful blue glass envelope. Ken KC8QO --- Mike Sawyer [EMAIL PROTECTED] wrote: John, If you are in a hurry, try checking out your local guitar shop. I'll lay odds that they have them available for about the same price you get for mail order. Mod-U-Lator, Mike(y) W3SLK - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, December 06, 2007 4:08 PM Subject: [AMRadio] 6CA7/EL34 replacements Please disregard my earlier post requesting information about substituting other numbered tubes for the 6CA7 for testing purposes. I got the transmitter working with the old 6CA7/EL34 tubes. Now to order some!! Has anyone had much luck with the cheaper import 6CA7 tubes such those sold by Antique Radio Supply under the brand names of JJ Electronics and Valve Art ??? Thanks for reading. 73, John, K5PGW __ 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. __ 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] 6CA7/EL34 replacements
I agree about the guitar shop. The Marshall amps use EL34 tubes and are pretty tough on them (like me, I'm a guitar player) I like the JJ tubes as they were the Tesla brand and are made in the Czech Republic. They also have a model with beautiful blue glass envelope. Ken KC8QO --- Mike Sawyer [EMAIL PROTECTED] wrote: John, If you are in a hurry, try checking out your local guitar shop. I'll lay odds that they have them available for about the same price you get for mail order. Mod-U-Lator, Mike(y) W3SLK - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, December 06, 2007 4:08 PM Subject: [AMRadio] 6CA7/EL34 replacements Please disregard my earlier post requesting information about substituting other numbered tubes for the 6CA7 for testing purposes. I got the transmitter working with the old 6CA7/EL34 tubes. Now to order some!! Has anyone had much luck with the cheaper import 6CA7 tubes such those sold by Antique Radio Supply under the brand names of JJ Electronics and Valve Art ??? Thanks for reading. 73, John, K5PGW __ 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] Just a thought for laughter and memory
You mean that the Beer Can Vertical was a joke? No wonder my friends and I never got the solder to take (we were in high school) Ken KC8QO --- Thomas Adams [EMAIL PROTECTED] wrote: Question: What was your favorite April QST April Fool's article, or one that could have qualified? I think my all time favorite (and the one that destroyed the most equipment) was the one about the dummy load made of RG8/U coax. It was a section about a foot long with PL-259s on each end. On the far end was a Tee connector, with a 12 loop of coax between the open ends of the Tee. The LETTERS column was hilarious the next few issues... like the guy who actually made one (he was far from alone!), and hooked it to his shiny new Hallicrafters SR-2000 Hurricane and put his final amp tubes into orbit around the moon!!! Second prize went to the Electron Accelerator antenna. The graphics showed a dipole, with electrons wandering around randomly in a lotta space inside of the wire near the center of the antenna. Maybe an eighth wavelength down the antenna, the wire size was suddenly REDUCED, forcing the electrons into nice, orderly, tightly packed streams! Honorable mention goes to the guy who published the NASA Cycles to Hertz Conversion Nomograph!!! Mr. T., W9LBB __ 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] Receivers
I mainly use a Heathkit Comanche MR-1 (with a DX-40 TX). Audio on AM isn't bad at all and I got it for free. Ken, KC8QO --- Kim Elmore [EMAIL PROTECTED] wrote: Much of the traffic here concerns transmitters. References to receivers seem relatively sparse in comparison. With that subjective impression as an opening, what sort of receivers are in use in the AM community? Kim Elmore, N5OP __ 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] wireless
Opera! Funny! When I am in one of the electronics appliance stores, I tune all of the radios to the local public radio classical music station. The rap fans must think I'm nuts. ken, KC8QO --- Brett gazdzinski [EMAIL PROTECTED] wrote: I had a two tube kit, 6aq5 output and a 12ax7 speech amp in screen modulation I suppose, it was really low parts count. Got out good with a 100 foot wire though, blocks! Used to play the cassette deck of my favorite tunes over it and ride around with a transistor radio. When the girls next door had a radio station blaring, I would zero beat and put opera on... Brett N2DTS Confession time? I had a Laf-a-Lot (Lafayette) 2 tube wireless broadcaster, hot chassis and all, which I connected to a wire and made it out to one block away. I had a junky turntable, a really old Mike, and a couple of toggle switches as my mixer. Only had a few 45 rpm records back then, so my programming was rather limited. Everything was fine until I connected the input jack of the transmitter to the speaker jack of my Knight Kit Star Roamer, trying to rebroadcast shortwave over medium wave. The sparks flew as i grounded the chassis of the transmitter, not having correctly polarized outlets in my parents 100 year old house. Next I tried ham radio, that seemed to be the ticket 73 John K5PRO Coverage, coverage, coverage! What memories you had me remember. Anyone else do the Cutting Edge in the AM bands? 73 Robert W4RL __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net 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 mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net 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 mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net 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] Broadcast transmitter
Steve, I have a leftover BC1-T at an AM site that they said I can have. It can't go to my house if I want to stay married so I may try to put up a wire at the AM site it still is residing at. I am still contracting there anyway and there is plenty of space for a wire antenna. I haven't tried to operate on HF at an on-air site before. Is it possible (1 KW)? It might take a good filter on the receiver for 160 or 75 meters. How's life in Idaho? Ken Zuercher KC8QO --- [EMAIL PROTECTED] wrote: I just got a RCA BTA 5F Wow - that's a *big* old beast. I had a 5F at the WGH night site - I could climb inside a couple of the cabinets! It was huge for 5 kW. I really liked the schematic printed on rolled-up silk. Steve WD8DAS __ 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] DX-40
Rick, I also have a Shure 444 and it sounds fine. I may start fooling around with a higher fidelity mike and a modulation monitor (from my part time broadcast engineering business) to see how good the audio can be with controlled carrier modulation. Hope to hear you on 40 meter phone. Ken, KC8QO --- Rick Brashear [EMAIL PROTECTED] wrote: Thanks Ken. The filter caps had recently been replaced, I checked them anyway and they tested fine. Replacing a couple of bypass caps seemed to do the trick. There is a little noise left, but I honestly think it's just incidental noise not an actual hum. My buddy is using a D-104 (non amplified) and it seems to be over modulating no matter chow softly you speak or how far away from the mic. Have you had any experience with that? When I operate my DX-40 I use a Shure 444 and have never had that problem. Thanks for the advice and help. Rick/K5IZ __ 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] DX-40
Rick, I rebuilt my DX-40 a few years ago and bit the bullet. I changed the filter caps and unfortunately the power transformer. It all works fine. I would recommend just throwing awaw the filter caps as they are likely to be very old and the hum might be due to them. Good luck, i'll keep my ear out for your progress. Ken KC8QO --- Rick Brashear [EMAIL PROTECTED] wrote: A friend and I are working on his DX-40. It works beautifully with the exception of a hum (sounds more like 60 than 120 cycles to my ear) on the carrier when in phone mode whether the mic is connected or not. We have just begun to look at it, but I thought if someone here has had experience with the same problem it could possibly save a little time. Thanks, Rick/K5IZ __ 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] FCC and AM on the BC band
Sorry I just got around to reading this for a reply. The prime cause of wierdness in programming and quality is that there is rarely anyone minding the store at Commercial stations, especially AM. The stations are being run by computers, Usually windows machines that are riddled with bugs. The engineers are like me, a contractor that isn't on staff and only called in ocassionally. Thing happen to the systems and you get dead air, multiple sources on the air,etc. I also think that political commentary doesn't belong on this or any other ham radio list. Considering that 90% of the AM talkers are of the right wing variety, comments about Air America should be best kept to one self. Not all of us think alike and that's a very good thing. If we did, we all would have only rice box rigs. Ken KC8QO --- VJB [EMAIL PROTECTED] wrote: The FCC is allowing the quality of AM signals to deteriorate, but it's been over a very long period of time. First there was the neglect of receiver standards which could have forced car radio and home tuner manufactuers to comply with minimum specs on selectivity and audio fidelity. Many industry observers feel this could have been established during the AM Stereo controversy. Then, after failing to do that, the FCC allowed the industry to propose and implement a 9 kHz transmitted bandwidth standard, ostensibly to minimize adjacent channel interference. In the time since digital decoding and encoding became a successor to the (sometimes) equalized metallic pair between studio and transmitter, there has not been enough industry interest at making sure digital artifacts are held to a minimum Lately, the industry jumped on the digital bandwagon that rolled through television then FM, to voluntarily try to implement In-Band, On-Channel digital service on contemporary AM frequencies. The side effects of this system spread interference well past 15 to 20 Kc from center frequency, as a function of trying to match (not beat) the kind of analog audio quality our parents remember when they were tuned to AM on the old wooden floor console that served as the Home Entertainment Center in those pre-TV days. Paul/VJB __ 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 AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] AM Power Level
Joe, When you're aligning your SX-117, check the coupling caps. I had a Hammarlund HQ-110 from the 60's that needed some coupling caps to bring the sensitivity back. Have fun! Ken Zuercher, KC8QO --- Joe Bento [EMAIL PROTECTED] wrote: Thanks all for your help. There are far more variables than I thought in calculating the actual PEP output of an AM transmitter. It will be some time yet till I'm ready to get on the air in AM mode. Besides the class-E project, I need to give my Hallicrafters SX-117 receiver an alignment. It's become somewhat deaf over the years. Otherwise, I do not currently have another HF receiver suitable for AM. My older Kenwood transceiver is good for CW and SSB only. Thanks for the help! 73 Joe Bento N6DGY Pleasant Grove, Utah ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio __ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com
Re: [AMRadio] Broadcast Transmitters
Dave, I haven't had the fun of working with Western Electric Transmitters, It would probably be the only size that would fit in my house and not cause a divorce. The 350B tubes are being used by the hi-Fi audio bunch. I think one of the tube companies are making them again. I did recently restore the Collins 20-V and had it on the air in Ann Arbor,MI. The main is a Continental Power Rock 1 KW and needed some parts. The Collins has some supporters in the Ham community. I have a friend who is a broadcast engineer in Toledo who took one out of service and plans on putting it on 75 meters. I'd love to take it home. It's construction is a work of art. I'm not looking forward to taking it out of service any time soon as it is history and sounds very good on the air. We run music on it. It is only 500 Watts and is the same cabinet etc as the 1 KW version so it is indeed a beast. Let me know how the Western Electric comes out as I'd love to hear it on the air. I will try to get on the 15 meter AM net soon. My AM rig is a Heathkit DX-40 so there is not a lot of power. It should be audible on 15 however. Ken Zuercher Chief Keeper of the Nostalgia --- David Knepper [EMAIL PROTECTED] wrote: Ken, I am presently restoring a Western Electric 250 watt transmitter, designated 451A-1. Have you ever seen one of these units. I assume that they are rather rare. This was a back up transmitter for a local radio station and was first placed in operation in 1947. I would think that anything made by Western Electric would be a collector's item. The tubes in this unit, particularly the 350B audio tubes bring big bucks. Thank you. David Knepper - W3ST Secretary to the Collins Radio Association (CRA) Publisher of the Collins Journal www.collinsra.com CRA station call - W3CRA - Original Message - From: Ken Zuercher [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Friday, April 11, 2003 10:14 PM Subject: Re: [AMRadio] Broadcast Transmitters I presently have an AM broadcast site with both the Continental and the Gates in service. They both work fine but I'd take the Continental first. Better audio because of the PWM modulation. 3-500Z tubes are getting to be a problem for continuous service due to Eimac no longer making them. I have had good results from the Taylor and the RFParts tubes (and they are very reasonable priced.)Wish I had space for one of these but I'd probably need to replace my wife at that point. Ken KC8QO also, WJYM, WTKA, WHNE, WQKL, engineer --- Todd Bigelow - PS [EMAIL PROTECTED] wrote: Jim - What part of Wyoming are you in? I have a brother in Kemmerer, formerly Cheyenne. Was headed out there a few years back to pick up a Collins 300G from Utah, but someone else picked it up. I let a couple of BC1-Ts go by here because I wanted the 300G instead, but since that didn't work out... I'm in Vermont, so it's a helluva hike for me, but perhaps he could store it and that would give me more incentive to visit him again soon. He's with the Highway Patrol, so plenty of strong backs to help out with the move. Too bad you can't keep 'em! 73, Todd/'Boomer' KA1KAQ Tommye Jim Wilhite wrote: Hi Mike: Wish I had the space for a 1/4 wave vertical and shack for it myself, but sadly I don't. The coils and insides look new. The only modification is the engineer put a window in the front panel to be able to see the tubes. Coils are clean like new as are all other parts. Sure you don't want it? The engineer says it is capable of about 140% positive modulation. You could have about a month to pick it up. 73 Jim de W5JO Jim, Boy that Continental rig sounds like it would be a neat rig to put on 160. Unfortunately, Wyoming is a little out of my reach. Mike(y) W3SLK ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio __ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio __ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo http://search.yahoo.com
RE: [AMRadio] re: R 390A
Brett, This is the first I've heard about your simple superhet. Is ther more info that you'd be willing to fill me (us) in about it? I need a project for this summer. I have been considering a Regenerative tube receiver, the superhet would be better of course.Thanks in advance. Ken KC8QO --- Brett Gazdzinski [EMAIL PROTECTED] wrote: Ron, I have an r390A. Very good receiver, its a bit ugly compared to some others, but a very good design. It needs the audio taken off the diode load in the back, and put into a nice audio amp and speaker to be hi fi, as do most receivers. Used to be my favorite one to use while I was on the air, as its accurate, stable, reliable, has a scope output, nice mechanical filters, etc. I have since found out its quite noisy though, and now I notice I have a bad cap crackling someplace in the audio background. Its not a receiver you want if you jump around a lot, way too much cranking of knobs, but if you stick around one band, its great. The gears and alignment are not bad, the alignment is actually easy, the pain is when you break a gear clamp buried under a lot of other gears. Then, its a bit of like working on a transmission. My simple home brew superhetrodine blows the r390 away, better fidelity, much lower noise level, better AM filter bandwith, better frequency accuricy, easier to jump between 160, 80 and 40 meters. The r390 would be better than ANY stock rice box receiver though... Brett N2DTS Hi again... I have a chance to buy a R 390A. All those gears, etc. look imposing. It is really such a great radio? from Ron VE4SR --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html The reason this message is shown is because the post was in HTML or had an attachment. Attachments are not allowed. To learn how to post in Plain-Text go to: http://www.expita.com/nomime.html --- ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio __ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com
[AMRadio] Central Electronics 10A Exciter found
Hello all, Does anyone have any quick info on a Central Electronics 10A Exciter in very good condition. I found it at a local electronics store and am considering purchasing it. It has all of the parts including some plug in coils but I didn't see a manual. I have heard about the 20A but not a 10A. It has a three position switch for SB1,SB2, AM. They have it for what seems a reasonable price from a silent key. I am interested in it's AM capability of course. Ken Zuercher, KC8QO Chief Engineer, Clear Channel Broadcasting Ann Arbor, MI __ Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site http://webhosting.yahoo.com
