[AMRadio] new tubes for sale
Hi Guys: We have acquired another batch of tubes, some new, some used. There are too many to list them all at one time. This is a list of new tubes in the original boxes. We will list the used ones in a couple of weeks, after the dust clears from this sale. We will warrant all of these tubes for 30 days. We priced them at or below 1/2 of what the big boys are asking. Any defects should be returned post-paid and we will make a refund. To minimize the handling, we are setting a minimum cost of $10 per order. Thank you. Ed Richards Spencer Smith 0B212.001AD421.501AG522.001R512.502C39A116.002D2122.502E2443.002E2632.502 E32103.002E36112.502E421Offer3B421.203S411.505R4GYB66.005Z318.006AB482.00 6AH6A11.506AK521.006AK5/EF95111.506AK641.506AL551.006AQ5A52.506AQ5/600532 .506AQ8/ECC8557.006AS7G15.006AS881.006AT621.006AU5GT12.506AU8A22.006AV611 .506BA631.506BA8A12.506BC433.006BC5/6CE5151.006BE6162.006BH6382.006BJ661. 506BN612.006BY612.006C462.506C511.506CA4109.006CB6A/6CF671.506CM6113.006C U591.006CY512.006DG6GT11.506DT611.006EA883.006EV5112.006J6A131.506SA711.5 06SH721.506SH7GT21.506SK712.506SN7GTB29.006SQ712.006T811.006T8A141.006U8A /6AX842.50/6KD8/5KD86U1013.006W4GT11.006X4102.0012AD611.5012AT621.5012AT7 44.0012AT7-8M14.0012AT7/ECC8154.0012AU7/ECC8257.0012AU7A44.0012AV7152.001 2AX719.0012BE612.5012BH7A208.0012BL611.5012BZ615.0012DT813.0012SK712.0019 T812.5025T (Eimac)220.0035W413.0050B511.50829B27.00832A43.505651A101.50567282.005678 71.50572551.00572721.50576314.005894125.00596322.006072/12AY724.50607312. 50610111.006159B34.006201/12AT7WA24.00626572.006663/6AL551.006681/12AX713 .00CK6883138.006883B/8032A/855229.006939113.007054102.00705652.507060151. 50716751.507551163.507905286.00803289.008032A69.00810625.00 __ 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] circuit info
No, not yet. Thank you. Ed On Tue, 27 Feb 2007 14:27:52 -0600 Geoff/W5OMR [EMAIL PROTECTED] writes: Edward B Richards wrote: Hi all; I want to build a QRP (5 watts) AM transmitter for 160 meters. I would like a crystal oscillator, buffer, PA and modulator. I am too lazy to do a lot of research if someone has the info at his fingertips. Can anyone suggest where I can find such a circuit? Thank you very much. There's a Cakepan transmitter that runs around 7 watts, using, I think, 12AX7's... check out Steve/WB3HUZ's AM Window website. (you're not too lazy to look up the URL, are you?) -- 73 __ AMRadio mailing list 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 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] circuit info
Thanks, Jim. Ed K6UUZ On Tue, 27 Feb 2007 15:00:17 -0800 (PST) Jim Candela [EMAIL PROTECTED] writes: Ed, Try these Piss Weak circuits: http://www.amwindow.org/tech/htm/pw.htm Jim JKO __ AMRadio mailing list 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 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] info wanted on 4-400 linear amplifier
Thanks, Tony. Ed K6UUZ On Tue, 02 Aug 2005 23:06:07 -0400 Anthony W. DePrato [EMAIL PROTECTED] writes: Ed: the Johnson Thunderbolt is a AB2 amp that uses 4-400A's check out this amp i think you might like the layout it uses a roller inductor instead of a varicap. 73 Tony wa4jqs At 06:10 PM 8/2/2005 -0700, you wrote: I am planning to build a linear amp around a grid driven 4-400 tube. Can anyone suggest where I can find a suitable circuit with component values. I would like band-switching for 80, 40 and 20 meters. I will be driving it with a 25 watt carrier output rice box on AM. I don't like the one in the ARRL 1967 handbook because it requires you to open the lid and physically change taps on the coil and change tuning capacitors. I don't have any other older handbooks. Thank you. Ed K6UUZ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net Anthony W. DePrato WA4JQS EXTRA - HEAVY CLASS Since 1962 South Sandwich Island Antarctic Dxpedition Group VP8BZL VP8SSI 3Y0PI V31SS ZD8JQS WA4JQS/4K1 WA4JQS/KC4 WA4JQS/ZS1 CQ DX HALL OF FAME # 35 A1-OP FISTS # 10573 AMI __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] info wanted on 4-400 linear amplifier
Thanks, Jim. Ed K6UUZ On Tue, 2 Aug 2005 20:07:29 -0700 (PDT) Jim Candela [EMAIL PROTECTED] writes: Ed, I always admire those about to undertake such a project. I don't have a circuit for you, but I will share a few ideas. If you do use grid driven, it will likely need to be class AB1 (zero drive power to tube, i.e, just voltage), or class Ab2 where the grid draws a little grid current on modulation peaks. In either case, 25 watts will be way too much. Given the above choices, I'd use Ab1, and a passive 50 ohm grid input resistor, and scale the drive just short of grid current. Still you will need a grid bias supply, and screen supply in addition to a plate supply. That is a lot of stuff, but hey, why not if you want to do it? Another approach, and I'm being a little simplistic here, is to think of a 4-400 in grounded grid as something similar to or about 4/5 a 3-500Z. A Heath SB-220 does legal limit AM with under 25 watts (carrier) of drive with two 3-500Z's in parallel G-G. No screen supply needed, and bias if necessary is easy with a power zener diode. So a 4-400 configured as a GG linear should be good for 150 to 200 watts am carrier output, and only need 10-15 watts carrier for drive. My figures are a SWAG, but I'd bet they are in the ballpark. Thanks for reading, Jim Candela WD5JKO --- [EMAIL PROTECTED] wrote: I am planning to build a linear amp around a grid driven 4-400 tube. Can anyone suggest where I can find a suitable circuit with component values. I would like band-switching for 80, 40 and 20 meters. I will be driving it with a 25 watt carrier output rice box on AM. I don't like the one in the ARRL 1967 handbook because it requires you to open the lid and physically change taps on the coil and change tuning capacitors. I don't have any other older handbooks. Thank you. Ed K6UUZ 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] info wanted on 4-400 linear amplifier
I am planning to build a linear amp around a grid driven 4-400 tube. Can anyone suggest where I can find a suitable circuit with component values. I would like band-switching for 80, 40 and 20 meters. I will be driving it with a 25 watt carrier output rice box on AM. I don't like the one in the ARRL 1967 handbook because it requires you to open the lid and physically change taps on the coil and change tuning capacitors. I don't have any other older handbooks. Thank you. Ed K6UUZ
Re: [AMRadio] Slip up mast for 80 meter antenna
Ron; I have installed dozens of them for TV antennas through the years. Up to 50 Ft (5 sections). They are just made from electrical thin-wall conduit (EMT). You can make your own cheaper. Paint a wide stripe around the bottom of each inner section about a foot from the end. Pull slowly and when you see the stripe, stop and insert the 1/4 cotter pin. You can make a base from 2 each 6 lengths of angle iron with a bolt through them and the bottom of the outside section. Good luck. 73, Ed K6UUZ On Sat, 30 Jul 2005 11:16:02 -0400 [EMAIL PROTECTED] writes: Looking for a 30 - 40 foot slip up mast for one end of my new 80 meter AM antenna. Radio shack used to carry these but I have been informed they no longer sell them. Any suggestions from the AM community as to where to find these nowdays? All the Best Ron - W6OM Ron Weaver - W6OM - CW AM __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] power ratings
Thanks, Gary. Ed K6UUZ On Mon, 11 Jul 2005 22:58:26 -0400 Gary Schafer [EMAIL PROTECTED] writes: [EMAIL PROTECTED] wrote: I have a junker HW-100 with a good PA section. How much power could I run as a linear amp using 2X6146 and what rating power supply would I need? Thanks. Ed K6UUZ 25 watts carrier with 100 watts pep output on the 6146's. 73 Gary K4FMX __ 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] Power ratings
I thought I understood these things, But I have confused me little self. I need some clear thinking here. I have a rice box rated for 100 watts SSB or 25 Watts AM. I belie
Re: [AMRadio] Power ratings
Sorry about this. I must have hit a wrong key and sent the message before I was done. Ed K6UUZ On Mon, 11 Jul 2005 08:42:39 -0700 [EMAIL PROTECTED] writes: I thought I understood these things, But I have confused me little self. I need some clear thinking here. I have a rice box rated for 100 watts SSB or 25 Watts AM. I belie __ 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] power ratings
I thought I understood these things, But I have confused me little self. I need some clear thinking here. I have a rice box rated for 100 watts SSB or 25 Watts AM. I believe the 100 watts is PEP while the 25 watts is RMS (continuous carrier). I want to add a linear amplifier to bring the 25 watts AM up considerably. I see the Ameritron AL-811 is rated for 600 watts SSB and 400 watts AM. Is this 400 watts PEP or RMS. If PEP that means the RMS rating is 100 watts, the same as my DX-100. Also it requires 75 watts of drive. Is this PEP or RMS. If RMS my rice box at 25 watts won't drive it. I am thinking the 75 watts of drive is PEP and my rice box with 100 watts PEP in AM will drive it. Can someone clarify this for me? Thanks. Ed K6UUZ
[AMRadio] power ratings
I want to thank everyone who responded to my question. The consensus of opinion is that the AL-811 runs 100 watts of carrier on AM with 400 watts PEP. This with 3X811 while my DX-100 does the same thing with 2X6146. Doesn't sound right, does it? I have a junker HW-100 with a good PA section. How much power could I run as a linear amp using 2X6146 and what rating power supply would I need? Thanks. Ed K6UUZ
Re: [AMRadio] Heath SB Problem!
Hi Bob; I have fixed several with this problem. Use a 1/4 inch shaft (from an old volume control, maybe) about 1/4 inch longer than your shaft. Get 2 each flat 3/8' sheet metal nuts (True Value Hardware, etc) and a 1/4 ID X 3/8 OD rubber grommet. Force the nuts (facing each other) onto the grommet. Force the grommet onto the end of the shaft. Install the same as original. Good luck. Ed K6UUZ On Thu, 7 Jul 2005 16:24:39 -0700 Bob Macklin [EMAIL PROTECTED] writes: Dennis, This afternoon the dial stopped turning when I turned the knob. I have been through this before. But this time I could not adjust it. I had to disaaemble the Bezel and get the input shaft out. One of the spring disks that form the friction drive has broken. I have contacted RTO about a replacement. I hope they have them. I am now going to pull the chassis out and see if I can find the broken piece. If I can find it I might be able to fix it. Thanks, Bob Macklin K5MYJ/7 Seattle, Wa. REAL RADIOS GLOW IN THE DARK - Original Message - From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, July 07, 2005 4:16 PM Subject: Re: [AMRadio] Heath SB Problem! In a message dated 7/7/05 3:22:37 PM, [EMAIL PROTECTED] writes: Is anyone here familiar with the LMO drive on a Heath SB unit? BOB, I've been into the one on my SB-300. What's the problem/question? Dennis D. W7QHO Glendale, CA __ 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] FS: Complete AM station...Pick-up only
Gentlemen; If you cannot arrange to pick this equipment up at Simi Valley, CA or do not want the entire lot, there is no need to read further. I am offering it first to the members of the reflectors. If it does no sell here, I will put it on that on-line auction site. If it does not sell there, I will break it up and ship it at the buyers expense for professional packing and shipping. I know I could get more if I was willing to break it up and ship it. Due to circumstances I am going for a quick, clean sale. Due to failing health, I am reducing my equipment inventory. I am starting with the largest, heaviest and most difficult to pack and ship: my AM station. It consists of the following items, all in good operating condition. I use this station for the weekly AMI net and the monthly CCA net. I get good reports on my audio. Heathkit DX-100B transmitter Hallicrafters SX-42 receiver Electro-voice model 620 mic Homebrew 10 speaker in wooden case Homebrew 12 Amp voltage reducer Heathkit IM-2410 frequency counter RCA WO-33A scope / mod mon Price: $500 cash and carry. If you are a sincere buyer please write for detailed description and pix. Please don't waste your time and mine if you cannot meet the above conditions. Thank you very much. Ed Richards K6UUZ
Re: [AMRadio] FS: Complete AM station...Pick-up only
Thanks, Dennis. Ed On Wed, 15 Jun 2005 18:14:00 EDT [EMAIL PROTECTED] writes: Ed, Sorry to hear about your health problems. Have forwarded your message on to a couple of guys who might be interested. 73, Dennis D. W7QHO Glendale, CA __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
