[AMRadio] FW: [Central-Electronics] CE 20A Phase shift question
something from another group that may be of interest to some of you on this group. It starts from the bottom as usual. I do primarily use my 20a on AM :-) Jim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jim candela Sent: Monday, January 30, 2006 9:11 PM To: K3PID Cc: [EMAIL PROTECTED] Subject: RE: [Central-Electronics] CE 20A Phase shift question Ron, Sure sounds like progress at ARS K3PID. I am curious about a few things with your setup, and a few other comments. With that VFO, I wonder how much you had to fiddle with it to make the output tuned circuit track the input tuned circuit? I gave up on mine, and added a second variable capacitor to tune separately. When operating on 80 meters, turning that 1625 plate tuning capacitor sure pulls the oscillator, upwards of 15 Kc. The 1625 is neutralized, or was when there was two of them... Your carrier null at -72 db seems rather optimistic, and I'd wager hard to hold. I did one 20a once where I used discreet resistors (3) along with a 5K pot to in effect use the pot as a "fine null", while maintaining the circuit impedances as when stock. The 20a I have on the air now has a stock balanced modulator pot setup, and I'd swear that my null can degrade 10db by just looking cross at the pots! Later 20a's have a temp compensation circuit in there so you can hold the null better while the rig warms up. My 20a's are modified for QRO, and therefore I lost 15 and 10 meter operation because of additional capacitance from the tube plate(s) to ground. Still, with a stock 20a to get on 10 meters the VFO needs to put out say 29 +/- 9, which is 20 or 38 Mhz. There is a CE module kit for 10 meters that goes into the BC-458 that has 3 tubes, and a crystal in it. I recall it putting out 38 Mhz for 29 Mhz transmit frequency. Without the optional VFO kit, your limited to 160 to 15 meters unless you use a crystal. Keep in mind that when using a crystal, say 3740 for 80 meter CW, the balanced modulator doesn't work...making this a old time Novice rig. A crystal that beats against the 9 Mc should work OK for phone work. I wonder what power you get from yours? On 160 and 80 meters you should see the maximum. The 6AG7's run pretty darn hot, and a little 12 volt DC fan on top of the 20A case can cool things a whole bunch. You could 1/2 wave rectify the filament voltage and with a capacitor filter get 8-9 volts for the fan. Running down there makes it almost silent. The 6AG7's run class AB1, and with enough drive, they go Ab2 and draw grid current. If you can hold the bias stable, several more watts RF output are possible. What happens stock is when the peak RF grid swing exceeds the -10 bias, the bias just gets more negative. This is self limiting. Still with today's line voltages (like 125) you might get upwards of 20 watts from that 20a, and maybe 25 watts with stabilized bias. On 40 meters where the VFO has to triple, drive is a problem, so output is usually much lower. 20 meters should provide good output as well. Keep up the good work! Maybe we can work each other on 20 meters when your ready? Regards, Jim WD5JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of K3PID Sent: Monday, January 30, 2006 8:04 PM To: [EMAIL PROTECTED] Subject: Re: FW: [Central-Electronics] CE 20A Phase shift question Jim, Thanks for the tips!!! I had completely overlooked the 9 MHz getting into the audio. I added both of your mods! I could only hold the circle from about 250 Hz to just under 2500 Hz, after the mod, the circle remains pretty true ( your eyes start to play tricks after you stare at it for awhile) through just over 4000 Hz ( maybe higher :>) ). I can suppress the carrier to about -72db and I can get the unwanted sideband a little lower. I just finished converting a BC-458 to the multiband VFO and while I haven't tried it on 15 or 10 yet it seems to be working fine on 160 ( my favorite band) and 80, 40 & 20. I haven't had this much fun since I first got my ticket in 1960.. Next... feed the 20A into the T-368 for some real punch!! 73 & Tnx K3PID Ron H. - Original Message - From: "Jim Candela" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, January 29, 2006 12:44 PM Subject: Fwd: FW: [Central-Electronics] CE 20A Phase shift question > > > Ron, > > Hats off to you for remembering how to use Lissajous > Figures! I forgot about that stuff, and you are > correct that two signals 90 degrees apart fed into > scope in X:Y mode should make a nice circle. I did set > up my 20a a few times with the scope, and with > perfectly compensated 10X probes (OK, best I could do) > I was able to get pretty close to correct setup by > varying the two audio pots within the 20a. Figuring > out 90 degrees phase shift was pretty tough, but 90 > +/-5 was doable. Heck next time I'll try Lissajous > figures! Setting the RF phase shifter with a scope > (looking for 90 degrees shift) is more
Re: [AMRadio] AM Transmitter Advice??
- Original Message - > I am gathering ideas for a homebrew AM transmitter.. If you are interested in solid state, a gold mine of information can be had from the Class E Web site. There is a link to it on www.amfone.net. Using plans on that site, you can build a legal-limit AM transmitter that will sound great while taking up only a foot or two of rack space. Class E is used in the current generation of AM broadcast transmitters. It is very efficient (>90%) and Steve Cloutier's designs on the Web site provide excellent performance on positive modulation peaks. Good luck with your project! Phil Galasso K2PG
RE: [AMRadio] AM Transmitter Advice??
Guys, I just looked up the MRF150. For the moment look at the characteristics below with a big AM final amplifier in mind. With a 300 watt Pd rating, this thing might do well as a efficiency amplifier (modulate the gate bias) to make 100 watts AM, and do so with room to spare. So with say 33% efficiency (SWAG), 300 watts DC input, you get 100 watts RF output with 200 watts Pd. With modulation the efficiency improves (doubles @100% modulation from sine wave tone input). If you do a conventional Class C high level modulated amplifier with say 150 watts Pd, and 75% efficiency (SWAG), that gives you 600 watts DC input X .75 = 450 watts RF output! There are tons of hi power solid state audio amplifiers around, so there is your modulator too! Sure, the application notes dwell on SSB linear usage, but heck if it works on SSB, you can make it work on AM! Regards, Jim So how much do these things cost? :-) MRF150 MAXIMUM RATINGS DrainSource Voltage VDSS 125 Vdc DrainGate Voltage VDGO 125 Vdc GateSource Voltage VGS ±40 Vdc Drain Current Continuous ID 16 Adc Total Device Dissipation @ TC = 25°C Derate above 25°C PD 300 1.71 W/°C Storage Temperature Range Tstg 65 to +150 °C Operating Junction Temperature TJ 200 °C MOTOROLA RF DEVICE DATA ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted.) Characteristic Symbol Min Typ Max Unit OFF CHARACTERISTICS DrainSource Breakdown Voltage (VGS = 0, ID = 100 mA) V(BR)DSS 125 Vdc Zero Gate Voltage Drain Current (VDS = 50 V, VGS = 0) IDSS 5.0 mAdc GateBody Leakage Current (VGS = 20 V, VDS = 0) IGSS 1.0 mAdc ON CHARACTERISTICS Gate Threshold Voltage (VDS = 10 V, ID = 100 mA) VGS(th) 1.0 3.0 5.0 Vdc DrainSource OnVoltage (VGS = 10 V, ID = 10 A) VDS(on) 1.0 3.0 5.0 Vdc Forward Transconductance (VDS = 10 V, ID = 5.0 A) gfs 4.0 7.0 mhos DYNAMIC CHARACTERISTICS Input Capacitance (VDS = 50 V, VGS = 0, f = 1.0 MHz) Ciss 400 pF Output Capacitance (VDS = 50 V, VGS = 0, f = 1.0 MHz) Coss 240 pF Reverse Transfer Capacitance (VDS = 50 V, VGS = 0, f = 1.0 MHz) Crss 40 pF FUNCTIONAL TESTS (SSB) Common Source Amplifier Power Gain f = 30 MHz (VDD = 50 V, Pout = 150 W (PEP), IDQ = 250 mA) f = 150 MHz Full data sheet: http://www.twhrf.net/mkic/mrf150.pdf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jim candela Sent: Monday, January 30, 2006 6:54 PM To: Discussion of AM Radio Subject: RE: [AMRadio] AM Transmitter Advice?? Larry, I am interested in what your friend Jim, KR1S has in mind for that 100 watt AM solid state exciter for 75 meters. Is that carrier output, or PEP? In thinking about it, this could vary from a "scaled up CB" rig with a tuned class C final with high level modulation, or maybe a small AM exciter with a solid state push pull linear, or maybe a class E setup. We seemed to get side tracked on the 813 amp idea, and glossed over the exciter concept you laid out. How about a nice juicy MRF-150 with high level drain modulation, or low level gate bias modulation? I bet no one has ever tried it either way.. Regards, Jim WD5JKO [mailto:[EMAIL PROTECTED] Behalf Of Larry Keith My friend, KR1S (Jim Kearman) is designing an AM transceiver, for me. We plan for this to be a solid-state unit that will deliver about 100 watts out. It will be single band (75 meters) and I have been considering using that to feed a homebrew linear. I have the makings of a 2 x 813 amp thanks to my and Jim's hamfesting efforts. Larry KQBY Larry Keith -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006 __ 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006
RE: [AMRadio] AM Transmitter Advice??
> I have heard from many AM ops that with the correct setup, a > linear amp works great. A proper amp and low-level exciter is totally indistinguishable from a high-level plate modulated rig at the far end. Some of the best sounding AM on the air is done this way, with exciters as simple as a (modified) DX-60. Perhaps one could argue about efficiency, but if the amp has sufficient plate dissipation and is properly loaded, you'll have a good clean AM signal (given the exciter is also clean and properly adjusted). An AL-1200 or similar amp, for example, handles 375W or so carrier output without even noticing it, and can be loaded well beyond 1500 watts -- into a dummy load of course -- to allow plenty of headroom for low distortion on modulation peaks. It may not be as "romantic", have see-through glass to watch the tube plates turn orange, or generate as much ozone as a big-iron rig, but it get's the job done just as well, and it isn't rocket science to set up properly. And then there's Class E, but that's another story :-) Grant/NQ5T
Re: [AMRadio] 3-1000 Chimney Clips Needed
ronnie.hull wrote: well thanks for that geoff but with past experiences, stuff like that would end up looking like it was done by a drunk monkey with a sledge hammer.. no thanks LOL It's either craft something your self, or pay out the nose for something 'commercially' made (e) ;-) ronnie.hull wrote: well I just don't think I am that skilled LOL.. I'm going to have to find some I can just purchase. thanks for the info though Ronnie - W5SUM You never know what you can do, till you try. If you don't do anything, then those will be your results - 'nothing'. Food for thought. ;-)
RE: [AMRadio] AM Transmitter Advice??
Larry, I am interested in what your friend Jim, KR1S has in mind for that 100 watt AM solid state exciter for 75 meters. Is that carrier output, or PEP? In thinking about it, this could vary from a "scaled up CB" rig with a tuned class C final with high level modulation, or maybe a small AM exciter with a solid state push pull linear, or maybe a class E setup. We seemed to get side tracked on the 813 amp idea, and glossed over the exciter concept you laid out. How about a nice juicy MRF-150 with high level drain modulation, or low level gate bias modulation? I bet no one has ever tried it either way.. Regards, Jim WD5JKO [mailto:[EMAIL PROTECTED] Behalf Of Larry Keith My friend, KR1S (Jim Kearman) is designing an AM transceiver, for me. We plan for this to be a solid-state unit that will deliver about 100 watts out. It will be single band (75 meters) and I have been considering using that to feed a homebrew linear. I have the makings of a 2 x 813 amp thanks to my and Jim's hamfesting efforts. Larry KQBY Larry Keith -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006
Re: [AMRadio] AM Transmitter Advice??
Gary, Thanks. Dennis D. W7QHO Glendale, CA
RE: [AMRadio] AM Transmitter Advice??
He is telling you that a pair of 813's as a linear are good for only 125 watts of carrier output on AM and that it takes tubes with at least 800 watts plate dissipation to run the legal limit on AM linear. 73 Gary K4FMX 73 Gary K4FMX > -Original Message- > From: [EMAIL PROTECTED] [mailto:amradio- > [EMAIL PROTECTED] On Behalf Of W1EOF > Sent: Monday, January 30, 2006 5:36 PM > To: Discussion of AM Radio > Subject: RE: [AMRadio] AM Transmitter Advice?? > > Dennis, > > I was with you until the end where you say: "Bottom line -- If you're > going > to build a linear do it right and go for a pair of 4-400's, single 4- > 1000A, > 3-1000Z or one of the big Russian tubes I've seen on eBay recently." > > Assuming one is going to build a linear, and so putting aside other issues > such as linear vs plate modulation, why do you think it makes a difference > what tube is used? Are you referring to running a linear at greater than > legal limit?. > > 73, > > Mark W1EOF > > > > > -Original Message- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > Sent: Monday, January 30, 2006 5:01 PM > > To: [EMAIL PROTECTED] > > Cc: amradio@mailman.qth.net > > Subject: Re: [AMRadio] AM Transmitter Advice?? > > > > > > Linears for AM -- here we go again for at least the third time in > > the past 12 > > months. > > > > Basic considerations: > > > > 1. Under carrier only conditions a correctly designed and > > adjusted linear > > amplifier will be operating at about 33% efficiency. So, with a > > pair of 813's > > the math works out to 125 watts of carrier, obviously not worth > > the effort if > > you're starting off with a 100 W carrier exciter. > > > > 2. The linear must be initially tuned up at the peak RF output > > value which, > > in turn, requires that the exciter (or some other source) must be > > capable of > > providing the input necessary to do this. Typically, his would > > be 4 times > > the carrier value but expect to hear a lot more on this from the > > "asymmetrical > > speech waveform" crowd. > > > > 3. "Real AM" can only come from a plate modulated class C PA in > > the view of > > certain members of this community. At the same time, big mod iron is > > expensive and hard to find. Also, for a legal max rig the wall > > plug efficiency of > > "high level" and "linear" is not that much different in the final > > analysis. > > > > Bottom line -- If you're going to build a linear do it right and go for > a > > pair of 4-400's, single 4-1000A, 3-1000Z or one of the big > > Russian tubes I've > > seen on eBay recently. I use my HB 3-1000Z amp on both SSB and > > AM, BTW. Works > > FB. > > > > Good luck with the project. > > > > Dennis D. W7QHO > > Glendale, CA > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06 > > __ > 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 Transmitter Advice??
Dennis, I was with you until the end where you say: "Bottom line -- If you're going to build a linear do it right and go for a pair of 4-400's, single 4-1000A, 3-1000Z or one of the big Russian tubes I've seen on eBay recently." Assuming one is going to build a linear, and so putting aside other issues such as linear vs plate modulation, why do you think it makes a difference what tube is used? Are you referring to running a linear at greater than legal limit?. 73, Mark W1EOF > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Monday, January 30, 2006 5:01 PM > To: [EMAIL PROTECTED] > Cc: amradio@mailman.qth.net > Subject: Re: [AMRadio] AM Transmitter Advice?? > > > Linears for AM -- here we go again for at least the third time in > the past 12 > months. > > Basic considerations: > > 1. Under carrier only conditions a correctly designed and > adjusted linear > amplifier will be operating at about 33% efficiency. So, with a > pair of 813's > the math works out to 125 watts of carrier, obviously not worth > the effort if > you're starting off with a 100 W carrier exciter. > > 2. The linear must be initially tuned up at the peak RF output > value which, > in turn, requires that the exciter (or some other source) must be > capable of > providing the input necessary to do this. Typically, his would > be 4 times > the carrier value but expect to hear a lot more on this from the > "asymmetrical > speech waveform" crowd. > > 3. "Real AM" can only come from a plate modulated class C PA in > the view of > certain members of this community. At the same time, big mod iron is > expensive and hard to find. Also, for a legal max rig the wall > plug efficiency of > "high level" and "linear" is not that much different in the final > analysis. > > Bottom line -- If you're going to build a linear do it right and go for a > pair of 4-400's, single 4-1000A, 3-1000Z or one of the big > Russian tubes I've > seen on eBay recently. I use my HB 3-1000Z amp on both SSB and > AM, BTW. Works > FB. > > Good luck with the project. > > Dennis D. W7QHO > Glendale, CA -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
[AMRadio] FS - HQ170C
Have an HQ-170C for sale. Works OK but probably could use tube check and alignment. Haven't had time to work with it . No dents, rust,etc but a couple of spots w/ paint rub off. Front panel gud. Gud shape otherwise. It has an original manual. Picture at http://www.qsl.net/wa0ahq/hq170.jpg Asking $225+shipping.
Re: [AMRadio] AM Transmitter Advice??
Linears for AM -- here we go again for at least the third time in the past 12 months. Basic considerations: 1. Under carrier only conditions a correctly designed and adjusted linear amplifier will be operating at about 33% efficiency. So, with a pair of 813's the math works out to 125 watts of carrier, obviously not worth the effort if you're starting off with a 100 W carrier exciter. 2. The linear must be initially tuned up at the peak RF output value which, in turn, requires that the exciter (or some other source) must be capable of providing the input necessary to do this. Typically, his would be 4 times the carrier value but expect to hear a lot more on this from the "asymmetrical speech waveform" crowd. 3. "Real AM" can only come from a plate modulated class C PA in the view of certain members of this community. At the same time, big mod iron is expensive and hard to find. Also, for a legal max rig the wall plug efficiency of "high level" and "linear" is not that much different in the final analysis. Bottom line -- If you're going to build a linear do it right and go for a pair of 4-400's, single 4-1000A, 3-1000Z or one of the big Russian tubes I've seen on eBay recently. I use my HB 3-1000Z amp on both SSB and AM, BTW. Works FB. Good luck with the project. Dennis D. W7QHO Glendale, CA *** Original message dated 1/30/06 12:08:03 PM, [EMAIL PROTECTED] writes (in part): > My friend, KR1S (Jim Kearman) is designing an AM > transceiver, for me. We plan for this to be a > solid-state unit that will deliver about 100 watts > out. It will be single band (75 meters) and I have > been considering using that to feed a homebrew linear. > I have the makings of a 2 x 813 amp thanks to my and > Jim's hamfesting efforts. > > So far, we have been reading and kicking around ideas. > It seems that with the derating of the amp to handle > the continuous carrier, etc.. may be more trouble than > it is worth. >
Re: [AMRadio] AM Transmitter Advice??
My HN-500 uses a pair of 813's modulated by 810's. Both do quite well at 2kv. About 500 watts out and easily modulated to 100%. Mod-U-Lator, Mike(y) W3SLK - Original Message - From: "Brett gazdzinski" <[EMAIL PROTECTED]> To: "'Discussion of AM Radio'" Sent: Monday, January 30, 2006 4:11 PM Subject: RE: [AMRadio] AM Transmitter Advice?? A pair of 813's at 2000 volts and 400 ma will give you 600 to 700 watts of carrier output, and will be running easy. You would need a 400 watt modulator or better, I use a pair of 4x150a tubes in ab1, good for 600 watts of audio at 2000 volts. If you want single band operation, all you need to do is wind a tank coil out of copper tubing. For a simple, well working cheap and easy transmitter, its hard to beat a pair of 812a's modulated by a pair of 811a's. At 1500 volts, you get 300 watts out. Triodes can modulate nicely, no screens to worry about modulating. The 811/812 tubes are cheap, and in push pull link output, are stable and easy to do. I use the kilowatt plug in coils, so I can change bands if I want to. Easy way is to build a class C rf deck and excite it with a rice box, build a modulator and drive it with an 8 ohm output. 20 watts of audio will drive most modulator tube grids more then enough. I never liked the amp route, loads of power input and big tubes running hot, for little AM power output, and every amp adds distortion. Amps are great for ssb, but add a carrier and they are not so great. Brett N2DTS > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Larry Keith > Sent: Monday, January 30, 2006 3:07 PM > To: Discussion of AM Radio > Subject: [AMRadio] AM Transmitter Advice?? > > Well, Let's see if we can change the subject.. 8-) > > I am gathering ideas for a homebrew AM transmitter.. > > My friend, KR1S (Jim Kearman) is designing an AM > transceiver, for me. We plan for this to be a > solid-state unit that will deliver about 100 watts > out. It will be single band (75 meters) and I have > been considering using that to feed a homebrew linear. > I have the makings of a 2 x 813 amp thanks to my and > Jim's hamfesting efforts. > > So far, we have been reading and kicking around ideas. > It seems that with the derating of the amp to handle > the continuous carrier, etc.. may be more trouble than > it is worth. > > So, I would be interested in opinions as to the > relative merits of using a linear vs high-level > modulation. And, pointers to existing circuits would > be helpful.. > > Any ideas? > > 73, > > Larry > KQBY > > Larry Keith > 231 Shenandoah Trail > Warner Robins, GA 31088-6289 > [EMAIL PROTECTED] > 478-329-0030 (home) > > > __ > 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 > __ 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 Transmitter Advice??
A pair of 813's at 2000 volts and 400 ma will give you 600 to 700 watts of carrier output, and will be running easy. You would need a 400 watt modulator or better, I use a pair of 4x150a tubes in ab1, good for 600 watts of audio at 2000 volts. If you want single band operation, all you need to do is wind a tank coil out of copper tubing. For a simple, well working cheap and easy transmitter, its hard to beat a pair of 812a's modulated by a pair of 811a's. At 1500 volts, you get 300 watts out. Triodes can modulate nicely, no screens to worry about modulating. The 811/812 tubes are cheap, and in push pull link output, are stable and easy to do. I use the kilowatt plug in coils, so I can change bands if I want to. Easy way is to build a class C rf deck and excite it with a rice box, build a modulator and drive it with an 8 ohm output. 20 watts of audio will drive most modulator tube grids more then enough. I never liked the amp route, loads of power input and big tubes running hot, for little AM power output, and every amp adds distortion. Amps are great for ssb, but add a carrier and they are not so great. Brett N2DTS > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Larry Keith > Sent: Monday, January 30, 2006 3:07 PM > To: Discussion of AM Radio > Subject: [AMRadio] AM Transmitter Advice?? > > Well, Let's see if we can change the subject.. 8-) > > I am gathering ideas for a homebrew AM transmitter.. > > My friend, KR1S (Jim Kearman) is designing an AM > transceiver, for me. We plan for this to be a > solid-state unit that will deliver about 100 watts > out. It will be single band (75 meters) and I have > been considering using that to feed a homebrew linear. > I have the makings of a 2 x 813 amp thanks to my and > Jim's hamfesting efforts. > > So far, we have been reading and kicking around ideas. > It seems that with the derating of the amp to handle > the continuous carrier, etc.. may be more trouble than > it is worth. > > So, I would be interested in opinions as to the > relative merits of using a linear vs high-level > modulation. And, pointers to existing circuits would > be helpful.. > > Any ideas? > > 73, > > Larry > KQBY > > Larry Keith > 231 Shenandoah Trail > Warner Robins, GA 31088-6289 > [EMAIL PROTECTED] > 478-329-0030 (home) > > > __ > 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 Transmitter Advice??
No problem with them mounted horizontally if in the correct plane. Example: For years in the ARRL handbook 1960s there was an article that described separate 813x2 amp for each band, all rack mounted. As a young ham in the early 70s I would looke that and drool. The 813 is a great tube, certainly very high on the watt-per-dollar chart. It's always been one of my favorites along with the 810, 4-400, and the 4-125. I always thought the 4-125 would be great as a final for a say... 350W CW transmitter. Like the T-9er, but with more power out. Anyone needing projects, or potential projects email me off-list. No charge, I will give them away to a good home. 73, Mark W1EOF > -Original Message- > From: Todd, KA1KAQ [mailto:[EMAIL PROTECTED] > Sent: Monday, January 30, 2006 3:46 PM > To: [EMAIL PROTECTED]; Discussion of AM Radio > Subject: Re: [AMRadio] AM Transmitter Advice?? > > > On 1/30/06, W1EOF <[EMAIL PROTECTED]> wrote: > > > > I agree with Larry. I've been collecting the pieces for a 813x2 > desktop amp > > for awhile now. I'm almost ready to begin. > > Hmmm... interesting. I actually have a nice horizontally-mounted CW > 813 transmitter sitting up over the garage. I wonder what it would > take to add a modulator? I chuffed it into a Globe King cabinet > because I wanted to use the rack for something else, and there it > sits. > > Yesterday while I was playing around at building a "homebrew" (ala Don > Chester) 40 meter dipole, I was listening on 40 to a few guys > discussing the venerable 813. One of them was Tom M...Marcellano? > W3BYM (I think). He's written a fair number of articles for ER as I > recall, probably a few about 813 rigs. I think he said it was his > favorite tube and had nothing but praise for it. At least one of the > other guys either had or was running a 813 rig also. Wish now that I'd > paid more attention, but it might've resulted in soldering my finger > instead of the antenna. > > Has anyone ever mounted them horizontally to save space? I can't > remember if it's a single tube or a pair. Sure is compact. Power > supply is in the garage because it was too heavy to haul upstairs. > Looks like a Beastly 610 transformer on the chassis. > > As an aside, I think K1JJ Tom is still building a rig with a pair of > 813s blown through Dietz lantern globes as chimneys. There were > pictures of it on amfone not long ago. > > de Todd/'Boomer' KA1KAQ -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
Re: [AMRadio] AM Transmitter Advice??
On 1/30/06, W1EOF <[EMAIL PROTECTED]> wrote: > > I agree with Larry. I've been collecting the pieces for a 813x2 desktop amp > for awhile now. I'm almost ready to begin. Hmmm... interesting. I actually have a nice horizontally-mounted CW 813 transmitter sitting up over the garage. I wonder what it would take to add a modulator? I chuffed it into a Globe King cabinet because I wanted to use the rack for something else, and there it sits. Yesterday while I was playing around at building a "homebrew" (ala Don Chester) 40 meter dipole, I was listening on 40 to a few guys discussing the venerable 813. One of them was Tom M...Marcellano? W3BYM (I think). He's written a fair number of articles for ER as I recall, probably a few about 813 rigs. I think he said it was his favorite tube and had nothing but praise for it. At least one of the other guys either had or was running a 813 rig also. Wish now that I'd paid more attention, but it might've resulted in soldering my finger instead of the antenna. Has anyone ever mounted them horizontally to save space? I can't remember if it's a single tube or a pair. Sure is compact. Power supply is in the garage because it was too heavy to haul upstairs. Looks like a Beastly 610 transformer on the chassis. As an aside, I think K1JJ Tom is still building a rig with a pair of 813s blown through Dietz lantern globes as chimneys. There were pictures of it on amfone not long ago. de Todd/'Boomer' KA1KAQ
RE: [AMRadio] AM Transmitter Advice??
I agree with Larry. I've been collecting the pieces for a 813x2 desktop amp for awhile now. I'm almost ready to begin. I have heard from many AM ops that with the correct setup, a linear amp works great. As for the operation of 813s on 10M, Ronnie is correct that some people have had trouble there. I have some information from a ham who built an amp that runs from 160 - 10M. All it took was specific consideration of the interelectrode capacitance on 10M. If you are really interested I could email you the scans he sent me (once I get an OK from him). Best of luck on it and please keep us all informed as to your progress! 73, Mark W1EOF > -Original Message- > From: ronnie.hull [mailto:[EMAIL PROTECTED] > Sent: Monday, January 30, 2006 3:11 PM > To: Discussion of AM Radio > Subject: Re: [AMRadio] AM Transmitter Advice?? > > > > > Larry > for years I used a pair of 813's in grounded grid and drove them with a > ranger. It produced great sounding audio. I still have that as my > backup to my > globe king. > > 813's are great tubes. The only drawback for me is I like to > operate on ten > meters and 813's are shakey at best, up there. > > good luck on your project, Iknow you will enjoy it. > > ronnie - W5SUM > > -- Original Message --- > From: Larry Keith <[EMAIL PROTECTED]> > To: Discussion of AM Radio > Sent: Mon, 30 Jan 2006 12:06:43 -0800 (PST) > Subject: [AMRadio] AM Transmitter Advice?? > > > Well, Let's see if we can change the subject.. 8-) > > > > I am gathering ideas for a homebrew AM transmitter.. > > > > My friend, KR1S (Jim Kearman) is designing an AM > > transceiver, for me. We plan for this to be a > > solid-state unit that will deliver about 100 watts > > out. It will be single band (75 meters) and I have > > been considering using that to feed a homebrew linear. > > I have the makings of a 2 x 813 amp thanks to my and > > Jim's hamfesting efforts. > > > > So far, we have been reading and kicking around ideas. > > It seems that with the derating of the amp to handle > > the continuous carrier, etc.. may be more trouble than > > it is worth. > > > > So, I would be interested in opinions as to the > > relative merits of using a linear vs high-level > > modulation. And, pointers to existing circuits would > > be helpful.. > > > > Any ideas? > > > > 73, > > > > Larry > > KQBY > > > > Larry Keith > > 231 Shenandoah Trail > > Warner Robins, GA 31088-6289 > > [EMAIL PROTECTED] > > 478-329-0030 (home) > > > > __ > > 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 > --- End of Original Message --- > > __ > 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 > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06 > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
Re: [AMRadio] AM Transmitter Advice??
Larry for years I used a pair of 813's in grounded grid and drove them with a ranger. It produced great sounding audio. I still have that as my backup to my globe king. 813's are great tubes. The only drawback for me is I like to operate on ten meters and 813's are shakey at best, up there. good luck on your project, Iknow you will enjoy it. ronnie - W5SUM -- Original Message --- From: Larry Keith <[EMAIL PROTECTED]> To: Discussion of AM Radio Sent: Mon, 30 Jan 2006 12:06:43 -0800 (PST) Subject: [AMRadio] AM Transmitter Advice?? > Well, Let's see if we can change the subject.. 8-) > > I am gathering ideas for a homebrew AM transmitter.. > > My friend, KR1S (Jim Kearman) is designing an AM > transceiver, for me. We plan for this to be a > solid-state unit that will deliver about 100 watts > out. It will be single band (75 meters) and I have > been considering using that to feed a homebrew linear. > I have the makings of a 2 x 813 amp thanks to my and > Jim's hamfesting efforts. > > So far, we have been reading and kicking around ideas. > It seems that with the derating of the amp to handle > the continuous carrier, etc.. may be more trouble than > it is worth. > > So, I would be interested in opinions as to the > relative merits of using a linear vs high-level > modulation. And, pointers to existing circuits would > be helpful.. > > Any ideas? > > 73, > > Larry > KQBY > > Larry Keith > 231 Shenandoah Trail > Warner Robins, GA 31088-6289 > [EMAIL PROTECTED] > 478-329-0030 (home) > > __ > 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 --- End of Original Message ---
[AMRadio] AM Transmitter Advice??
Well, Let's see if we can change the subject.. 8-) I am gathering ideas for a homebrew AM transmitter.. My friend, KR1S (Jim Kearman) is designing an AM transceiver, for me. We plan for this to be a solid-state unit that will deliver about 100 watts out. It will be single band (75 meters) and I have been considering using that to feed a homebrew linear. I have the makings of a 2 x 813 amp thanks to my and Jim's hamfesting efforts. So far, we have been reading and kicking around ideas. It seems that with the derating of the amp to handle the continuous carrier, etc.. may be more trouble than it is worth. So, I would be interested in opinions as to the relative merits of using a linear vs high-level modulation. And, pointers to existing circuits would be helpful.. Any ideas? 73, Larry KQBY Larry Keith 231 Shenandoah Trail Warner Robins, GA 31088-6289 [EMAIL PROTECTED] 478-329-0030 (home) __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[AMRadio] Use of List
I applaude you Brian,,Well said..Ron W6MAU
[AMRadio] Notice
Okay, here's the deal; guys, gals... This message below (from WA3FRP, copied) is not in accordance with proper posting to this list. I have refrained from getting involved in this discussion since there are so many of you that are far more informed on the subject than I, but I think it's about time to stop the "thread" on this subject here and now. Our list is primarily for discussion of AMRadio in regard to operating, equipment, tech questions, answers, scheds, news, and friendly discussion for those who enjoy our niche of the hobby. Announcements of threatening news against our part of ham radio is perfectly acceptable, but I think it's time to stop this discussion here and now Everyone by now surely knows what to do to voice your opinion to the FCC and ARRL. If any of you want to start your own "AMRadio Politics" email list... be my guest. Or... there are other places for this already. I will not tolerate name calling, as this message from WA3FRP has certainly done "on the list". Everyone has their opinions, but if you feel the need to get this explicit and decide to describe someone as Russ has, send a private email, go somewhere else ...or get lost. You are, Russ, the first person since 1998 to call someone an "asshole" on the AmRadio reflector. Congratulations! This list has been a productive source of good technical information regarding AM operation for many years, and I want to keep it that way. Again; if someone wants to start another list for "am politics" or name calling, go for it. Nuf said Brian / w5ami On Mon, 2006-01-30 at 10:22 -0500, [EMAIL PROTECTED] wrote: > Paul, > > OK you've cemented your reputation as being as asshole. Why don't you go > crawl under your rock and leave the rest of us folks, who want to have a > rationale discussion, alone for a while. > > 73, > > Russ > WA3FRP > __ > 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] sorry about that response length
Oops, I hit reply and forgot to remove all the topics in my reply on the chimney, please accept my regret! Duh! 73 John K5PRO
[AMRadio] 3-1000Z chimney clips
I have some somewhere, but sorry, they are buried in the shed. the idea of using some sort of curtain rod clip might be valid, you could just straighten them out and put a small fold on one, punch a hole, and voila, mounted on the chassis with the gripper upward. Be sure to use nonferrous everything, as the RF induction heating effect might be intense beside that tube/socket. Imagine one of those curtain rod things glowing orange. I seem to remember that the 3-500 chimney has a very simple springy metal thing that pushed against the edge of the chimney, should be able to make something from phosphor bronze springy stock, or even some old EMI gasket material or finger stock. John K5PRO -Original message- From: [EMAIL PROTECTED] Date: Mon, 30 Jan 2006 09:31:09 -0700 To: amradio@mailman.qth.net Subject: AMRadio Digest, Vol 24, Issue 75 > Send AMRadio mailing list submissions to > amradio@mailman.qth.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.qth.net/mailman/listinfo/amradio > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of AMRadio digest..." > > > Today's Topics: > >1. Re: 3-1000 Chimney Clips Needed ([EMAIL PROTECTED]) >2. Re: 3-1000 Chimney Clips Needed (david knepper) >3. Pete - party of one (VJB) >4. Re: 3-1000 Chimney Clips Needed (ronnie.hull) >5. Re: 3-1000 Chimney Clips Needed (W5OMR/Geoff) >6. Re: 3-1000 Chimney Clips Needed (ronnie.hull) >7. Re: Pete - party of one ([EMAIL PROTECTED]) >8. JB-70-A (Rick Brashear) >9. Re: JB-70-A (Todd, KA1KAQ) > 10. Re: JB-70-A (Rick Brashear) > > > -- > > Message: 1 > Date: Mon, 30 Jan 2006 12:55:53 + > From: [EMAIL PROTECTED] > Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > To: Discussion of AM Radio , Discussion of AM > Radio > Cc: "ronnie.hull" <[EMAIL PROTECTED]> > Message-ID: > <[EMAIL PROTECTED]> > > > I suspect that clips from 3-400s, 4-400s, and 3-500Zs would ALSO work. > > I TOO need them for a 4-1000A, and have simply decided to MAKE them from some > brass stock. I'm going to use a set from a 3-400 as a template. > > Bob - N0DGN > > -- Original message -- > From: "ronnie.hull" <[EMAIL PROTECTED]> > > > > > > Yes, 4-1000A Clips would work just fine. I have searched Richardson > > Electronics, RF Part and etc etc.. can't find them anywhere. > > > > Ronnie - W5SUM > > > > -- Original Message --- > > From: "david knepper" <[EMAIL PROTECTED]> > > To: "Discussion of AM Radio" > > Sent: Sun, 29 Jan 2006 19:30:31 -0500 > > Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > > > > > Ronnie, wouldn't the 4-1000A clips work. I have a used 3-1000A with > > > socket. I may make an amplifier out of it. Is that what you are > > > comtemplating? Ideas would be welcome. I do know back in the 70's > > > that this tube was smash hit with the hams. > > > > > > Thanks > > > > > > Dave, W3ST > > > Publisher of the Collins Journal > > > Secretary to the Collins Radio Association > > > www.collinsra.com - the CRA Website > > > Now with PayPal > > > CRA Nets: 3805 Khz every Monday at 8 PM EST > > > and 14255 every Saturday at 12 Noon EST > > > - Original Message - > > > From: "ronnie.hull" <[EMAIL PROTECTED]> > > > To: > > > Sent: Sunday, January 29, 2006 7:04 PM > > > Subject: [AMRadio] 3-1000 Chimney Clips Needed > > > > > > > > > > > I need a set of these clips. I don't want to fabricate them. Anyone > > > > have > > > > any > > > > of these little beasties they will part with? > > > > > > > > Thanks > > > > > > > > Ronnie > > > > > > > > __ > > > > 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 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 > > --- End of Original Message --- > > > > __ > > 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 L
[AMRadio] Delete Key Needed
Gentlemen, Would anyone happen to have a spare "delete" key for the standard keyboard? Mine seems to be wearing out.. Have a Nice Day
Re: [AMRadio] Pete - party of one
Rev. Don Sanders wrote: This type of comment should be only in direct emails not to the whole network. Let everyone else have their own opinions. They don't need yours. PLEASE, Keep discussions civil. Healthfully yours, DON W4BWS - Original Message - From: <[EMAIL PROTECTED]> To: Sent: Monday, January 30, 2006 9:22 AM Subject: Re: [AMRadio] Pete - party of one Paul, OK you've cemented your reputation as being as asshole. Why don't you go crawl under your rock and leave the rest of us folks, who want to have a rationale discussion, alone for a while. 73, Russ WA3FRP Well, Don, it shows the typical mentality of the ARRL supporter. If you don't agree, you're labelled an "asshole" or worse. -- _ _ _ _ _ / \ / \ / \ / \ / \ John L. Sielke ( W ) ( 2 ) ( A ) ( G ) ( N ) http://w2agn.net \_/ \_/ \_/ \_/ \_/ "CRUSTY OLD CURMUDGEON - AND PROUD OF IT!"
Re: [AMRadio] Pete - party of one
This type of comment should be only in direct emails not to the whole network. Let everyone else have their own opinions. They don't need yours. PLEASE, Keep discussions civil. Healthfully yours, DON W4BWS - Original Message - From: <[EMAIL PROTECTED]> To: Sent: Monday, January 30, 2006 9:22 AM Subject: Re: [AMRadio] Pete - party of one > Paul, > > OK you've cemented your reputation as being as asshole. Why don't you go > crawl under your rock and leave the rest of us folks, who want to have a > rationale discussion, alone for a while. > > 73, > > Russ > WA3FRP > __
Re: [AMRadio] JB-70-A
Hi Todd... Thanks again and again I'll be glad to at least pay shipping. My address is: Rick Brashear 1227 Flanders St. Dallas, TX 75208 tnx es 73... Rick/K5IZ Todd, KA1KAQ wrote: Hey Rick - Shoot me your address when you get a minute, I want to get that coil out to you later this week. ~ Todd __ 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] JB-70-A
Hey Rick - Shoot me your address when you get a minute, I want to get that coil out to you later this week. ~ Todd
[AMRadio] JB-70-A
Hi all I'm getting old, so forgive me if I have recently posted this request. I am searching for a JB-70-A Junction Box for the BC-610. If anyone has one they'd be willing to part with or if you happen to know of someone who might have one, please, let me know. Thanks and 73 to all... Rick/K5IZ
Re: [AMRadio] Pete - party of one
Paul, OK you've cemented your reputation as being as asshole. Why don't you go crawl under your rock and leave the rest of us folks, who want to have a rationale discussion, alone for a while. 73, Russ WA3FRP
Re: [AMRadio] 3-1000 Chimney Clips Needed
well thanks for that geoff but with past experiences, stuff like that would end up looking like it was done by a drunk monkey with a sledge hammer.. no thanks LOL R -- Original Message --- From: W5OMR/Geoff <[EMAIL PROTECTED]> To: Discussion of AM Radio Sent: Mon, 30 Jan 2006 08:24:44 -0600 Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > ronnie.hull wrote: > > >well I just don't think I am that skilled LOL.. I'm going to have to find > >some > >I can just purchase. > > > >thanks for the info though > > > >Ronnie - W5SUM > > > > > > You never know what you can do, till you try. > > If you don't do anything, then those will be your results - 'nothing'. > > Food for thought. ;-) > > -- > 73 = Best Regards, > -Geoff/W5OMR > > __ > 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 --- End of Original Message ---
Re: [AMRadio] 3-1000 Chimney Clips Needed
ronnie.hull wrote: well I just don't think I am that skilled LOL.. I'm going to have to find some I can just purchase. thanks for the info though Ronnie - W5SUM You never know what you can do, till you try. If you don't do anything, then those will be your results - 'nothing'. Food for thought. ;-) -- 73 = Best Regards, -Geoff/W5OMR
Re: [AMRadio] 3-1000 Chimney Clips Needed
well I just don't think I am that skilled LOL.. I'm going to have to find some I can just purchase. thanks for the info though Ronnie - W5SUM -- Original Message --- From: [EMAIL PROTECTED] To: Discussion of AM Radio , Discussion of AM Radio Sent: Mon, 30 Jan 2006 12:55:53 + Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > I suspect that clips from 3-400s, 4-400s, and 3-500Zs would ALSO work. > > I TOO need them for a 4-1000A, and have simply decided to MAKE them > from some brass stock. I'm going to use a set from a 3-400 as a template. > > Bob - N0DGN > > -- Original message -- > From: "ronnie.hull" <[EMAIL PROTECTED]> > > > > > > Yes, 4-1000A Clips would work just fine. I have searched Richardson > > Electronics, RF Part and etc etc.. can't find them anywhere. > > > > Ronnie - W5SUM > > > > -- Original Message --- > > From: "david knepper" <[EMAIL PROTECTED]> > > To: "Discussion of AM Radio" > > Sent: Sun, 29 Jan 2006 19:30:31 -0500 > > Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > > > > > Ronnie, wouldn't the 4-1000A clips work. I have a used 3-1000A with > > > socket. I may make an amplifier out of it. Is that what you are > > > comtemplating? Ideas would be welcome. I do know back in the 70's > > > that this tube was smash hit with the hams. > > > > > > Thanks > > > > > > Dave, W3ST > > > Publisher of the Collins Journal > > > Secretary to the Collins Radio Association > > > www.collinsra.com - the CRA Website > > > Now with PayPal > > > CRA Nets: 3805 Khz every Monday at 8 PM EST > > > and 14255 every Saturday at 12 Noon EST > > > - Original Message - > > > From: "ronnie.hull" <[EMAIL PROTECTED]> > > > To: > > > Sent: Sunday, January 29, 2006 7:04 PM > > > Subject: [AMRadio] 3-1000 Chimney Clips Needed > > > > > > > > > > > I need a set of these clips. I don't want to fabricate them. Anyone > > > > have > > > > any > > > > of these little beasties they will part with? > > > > > > > > Thanks > > > > > > > > Ronnie > > > > > > > > __ > > > > 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 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 > > --- End of Original Message --- > > > > __ > > 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 --- End of Original Message ---
[AMRadio] Pete - party of one
Pete, with your acknowledgement that you spoke with your volunteer representatives of the group in Newington, you have become their only known exchange with someone active in the AM Community. I'm glad you feel you represented us as they put together their Petition. If you know of anyone else who may have helped shape their ideas, I'd like to slam them too. Paul/VJB __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [AMRadio] 3-1000 Chimney Clips Needed
Bob, the clips are not similar. The ones used with the chimney for the 4-1000A are more like fuse clips. See the 1967 ARRL Handbook's picture of the 3-1000A linear. You can clearly see these clips. I wonder if curtain rod holders might work. These are brass clips that a hardware store might have or try WalMart in the curtain department. Good luck and if you find something, please report back. Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST - Original Message - From: <[EMAIL PROTECTED]> To: "Discussion of AM Radio" ; "Discussion of AM Radio" Cc: "ronnie.hull" <[EMAIL PROTECTED]> Sent: Monday, January 30, 2006 7:55 AM Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed I suspect that clips from 3-400s, 4-400s, and 3-500Zs would ALSO work. I TOO need them for a 4-1000A, and have simply decided to MAKE them from some brass stock. I'm going to use a set from a 3-400 as a template. Bob - N0DGN -- Original message -- From: "ronnie.hull" <[EMAIL PROTECTED]> Yes, 4-1000A Clips would work just fine. I have searched Richardson Electronics, RF Part and etc etc.. can't find them anywhere. Ronnie - W5SUM -- Original Message --- From: "david knepper" <[EMAIL PROTECTED]> To: "Discussion of AM Radio" Sent: Sun, 29 Jan 2006 19:30:31 -0500 Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > Ronnie, wouldn't the 4-1000A clips work. I have a used 3-1000A with > socket. I may make an amplifier out of it. Is that what you are > comtemplating? Ideas would be welcome. I do know back in the 70's > that this tube was smash hit with the hams. > > Thanks > > Dave, W3ST > Publisher of the Collins Journal > Secretary to the Collins Radio Association > www.collinsra.com - the CRA Website > Now with PayPal > CRA Nets: 3805 Khz every Monday at 8 PM EST > and 14255 every Saturday at 12 Noon EST > - Original Message - > From: "ronnie.hull" <[EMAIL PROTECTED]> > To: > Sent: Sunday, January 29, 2006 7:04 PM > Subject: [AMRadio] 3-1000 Chimney Clips Needed > > > > > I need a set of these clips. I don't want to fabricate them. Anyone > > have > > any > > of these little beasties they will part with? > > > > Thanks > > > > Ronnie > > > > __ > > 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 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 --- End of Original Message --- __ 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 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] 3-1000 Chimney Clips Needed
I suspect that clips from 3-400s, 4-400s, and 3-500Zs would ALSO work. I TOO need them for a 4-1000A, and have simply decided to MAKE them from some brass stock. I'm going to use a set from a 3-400 as a template. Bob - N0DGN -- Original message -- From: "ronnie.hull" <[EMAIL PROTECTED]> > > > Yes, 4-1000A Clips would work just fine. I have searched Richardson > Electronics, RF Part and etc etc.. can't find them anywhere. > > Ronnie - W5SUM > > -- Original Message --- > From: "david knepper" <[EMAIL PROTECTED]> > To: "Discussion of AM Radio" > Sent: Sun, 29 Jan 2006 19:30:31 -0500 > Subject: Re: [AMRadio] 3-1000 Chimney Clips Needed > > > Ronnie, wouldn't the 4-1000A clips work. I have a used 3-1000A with > > socket. I may make an amplifier out of it. Is that what you are > > comtemplating? Ideas would be welcome. I do know back in the 70's > > that this tube was smash hit with the hams. > > > > Thanks > > > > Dave, W3ST > > Publisher of the Collins Journal > > Secretary to the Collins Radio Association > > www.collinsra.com - the CRA Website > > Now with PayPal > > CRA Nets: 3805 Khz every Monday at 8 PM EST > > and 14255 every Saturday at 12 Noon EST > > - Original Message - > > From: "ronnie.hull" <[EMAIL PROTECTED]> > > To: > > Sent: Sunday, January 29, 2006 7:04 PM > > Subject: [AMRadio] 3-1000 Chimney Clips Needed > > > > > > > > I need a set of these clips. I don't want to fabricate them. Anyone have > > > any > > > of these little beasties they will part with? > > > > > > Thanks > > > > > > Ronnie > > > > > > __ > > > 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 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 > --- End of Original Message --- > > __ > 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
