Re: [AMRadio] Dayton Stuff
I have a Polycom 62 that I'll never get around to restore. Should clean up nice. Any offers? bob...w2ami - Original Message - From: Peter Markavage [EMAIL PROTECTED] Polycomm 62 sold. Pete
[AMRadio] FS: Some New Crystal Frequencies
FOR SALE: Added new frequencies now available in FT243 crystals for the ham bands: 1915, 1920, 1925, 1940, 1950, 1955, 1977.5 kHz 3505, 3510, 3515, 3520, 3700, 3702 kHz 3703, 3705, 3721, 3790 kHz 3800, 3805, 3810, 3825, 3830, 3837, 3840 kHz 7006.67, 7025, 7047, 7060, 7100, 7110, 7106.667, 7125 kHz 7140, 7159 kHz 14020, 14058 kHz Many, many more from 1 - 148 Mc. at: http://www.af4k.com/crystals.htm
Re: [AMRadio] Re - response to input to screen grid amplifier
Bill, assuming you want to use it as a linear, you should keep it as-is and work out how it is producing control-grid current like that. I have to think that the screens are tied to the control grids somewhere. Bacon, WA3WDR - Original Message - From: Bill Fondren [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Tuesday, May 23, 2006 5:04 PM Subject: [AMRadio] Re - response to input to screen grid amplifier Thanks for the quick response to my questions concerning this amp. John, I was ready for some salty remarks (hihi) and I did clean my glasses and take a second or third look at the thing. I thought I had missed something since going to USAF Radio School in the early 50's. Guess that tells u why I mess with vacumn tube rigs. Anyway thought I better get some expert opinions before starting to cut and chop to get it to a more conventional type. The construction of the amp is above average for a homebrew rig. A couple of other things There is a RFC choke coming off the G1 connections going to the 10K resistor then to the grid meter (0-30ma shunted with a 50 ohm 10 watt resistor) It does read about half scale peaking normal as u tune the grid circuit. Also a .01 bypass cap at the meter. The input coil is grounded in the middle through a RFC choke making a double coil, tuned by a split stator cap. One of the tuned circuits goes directly to the screen grids and the other feeds the neutralizing voltage back to the input from the plate. No bias circuits of any kind. The few times I used it I got good reports using a Elmac AF-67 exciter. Will probably change it to a more conventional type. Thanks again Bill K5PML __ 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
[AMRadio] Bands to consider
Thanks to those on here pointing out enjoyable, out of the ordinary AM activity on 75m, 20m and 10m. I would like to add 40m to your list of bands to consider. Saturday night into Sunday I had an excellent hourlong QSO with Dave, W9AD. We started out on 7290, and there was a SSB QSO that fired up just a little lower, probably thinking we were just another international broadcast station. But the unusual part was that 7295 was clear of BC signals from 9:30-11PM, clearing a place to set up and have a good chat. And we did. Reception quality was so good that we took time to record airchecks of one another to replay. Dave, near Chicago, was getting more QRN than myself, but not so much that it ruined conditions. Far cry from what I was hearing at the same time on 75m. Here's a recording Dave made early in the contact. He happened also to have some pithy comments from Bill, W8VYZ, that are bolted on here for inspiration. Save and reply as the occasion fits. Mod-u-later, Paul/VJB MP3 audio file, about 900K file size, Receiver: recorded on an SDR1000 Flex radio. http://www.wa3vjb.com/sound/40mNite.mp3 Transmitter: 1946 Collins 300-G, 1948 RCA mixing console, Sennheiser 441, with some processing by the MultiMax and MultiLimiter chain by Pacific Recorders Engineering. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[AMRadio] Thinking out loud
I'm sure this has been done or at least tried. How practical would it be to remove the L portion of the Pi L Network on the output of a BTA-1R2 and use the tunable 1L301 and appropriate capacitors on either side as the tunable output? I want only limited coverage on 75 meters (3.880 - 3.890) at this time and this seems the easiest, cheapest and fastest way to accomplish that. However, I'm old and my brain doesn't always tell me the truth, therefore, I ask you guys for your honest albeit likely critical opinion? Thanks, Rick/K5IZ
Re: [AMRadio] 10 Meters Open
Hey Mike: Thanks for the band condition update. Handy to have you around. 73 DE Charlie, K0NG ..
Re: [AMRadio] Dayton Stuff
Hey Bob: I dont have a clue what the Poly 6N2 is worth?? I am not a collector, just an old 6 2 AM operator. Care to cast a starting price si I will know to dicker or move on ?? Will try to keep your offer confidential. 73, Charlie, K0NG ..
[AMRadio] Polycom 62 was Dayton Stuff
Hi Charlie, We are some pair :-) Your not a collector and I'm not a dealer/seller. Did you ever own/operate a Polycom 62? I could only afford a Heath two'er back in the AM days. Tried Brian's AF4K boneyard price guide but get 404s at the moment. The wife is in your corner. bob...w2ami x wn2ami 1962 - Original Message - Hey Bob: I dont have a clue what the Poly 6N2 is worth?? I am not a collector, just an old 6 2 AM operator. Care to cast a starting price si I will know to dicker or move on ?? Will try to keep your offer confidential. 73, Charlie, K0NG ..
Re: [AMRadio] Polycom 62 was Dayton Stuff
I know what a 62 was worth at Dayton but probably would be better to discuss it off the party line. Pete, wa2cwa On Wed, 24 May 2006 21:44:23 -0400 RJ Mattson [EMAIL PROTECTED] writes: Hi Charlie, We are some pair :-) Your not a collector and I'm not a dealer/seller. Did you ever own/operate a Polycom 62? I could only afford a Heath two'er back in the AM days. Tried Brian's AF4K boneyard price guide but get 404s at the moment. The wife is in your corner. bob...w2ami x wn2ami 1962 - Original Message - Hey Bob: I dont have a clue what the Poly 6N2 is worth?? I am not a collector, just an old 6 2 AM operator. Care to cast a starting price si I will know to dicker or move on ?? Will try to keep your offer confidential. 73, Charlie, K0NG ..
