[AMRadio] Wanted: 9-pin accessory plug for Ranger I
Well, from the lack of responses I'm guessing this must be one of the rarest parts known to the AM community. So one final request... Anyone who may have an extra/not needed 9-pin male plug for the accessory socket on the Ranger I (and would be willing to part with i) please contact me off the list. Thanks for looking. Best 73 de W4MIL Chuck Palm Coast, FL More new features than ever. Check out the new AOL Mail ! - http://o.aolcdn.com/cdn.webmail.aol.com/mailtour/aol/en-us/text.htm?ncid=aolcmp000503 __ 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] Wanted: 9-pin accessory plug for Ranger I
Chuck, I dont have one, if I did i'd pop it in the mail, gratis... They can be found on epay, for example, http://cgi.ebay.com/Yaesu-FT-101-ACC-plug-accessory-plug-11-pin-FT- 101_W0QQitemZ150190690328QQihZ005QQcategoryZ40069QQssPageNameZWDVWQQrdZ 1QQcmdZViewItem try looking on AMfone, i'm sure someone has a few floating around... klc - Original Message - From: [EMAIL PROTECTED] Date: Thursday, December 6, 2007 8:58 am Subject: [AMRadio] Wanted: 9-pin accessory plug for Ranger I To: amradio@mailman.qth.net > > Well, from the lack of responses I'm guessing this must be one of > the > rarest parts known to the AM community. > > So one final request... Anyone who may have an > extra/not > needed 9-pin male plug for the accessory socket on the Ranger I > (and > would be willing to part with i) please contact me off the list. > > Thanks for looking. > > Best 73 de W4MIL > Chuck > Palm Coast, FL > ___ _ > More new features than ever. Check out the new AOL Mail ! - > http://o.aolcdn.com/cdn.webmail.aol.com/mailtour/aol/en- > us/text.htm? ncid=aolcmp000503__ > 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] Wanted: 9-pin accessory plug for Ranger I
Opps, that was a 11 pin. http://cgi.ebay.com/AMPHENOL-9-PIN-MALE-PLUG-RETAINER-FOR-COLLINS-51S- 1_W0QQitemZ160150143831QQihZ006QQcategoryZ48710QQrdZ1QQssPageNameZWD1VQ QcmdZViewItem - Original Message - From: [EMAIL PROTECTED] Date: Thursday, December 6, 2007 8:58 am Subject: [AMRadio] Wanted: 9-pin accessory plug for Ranger I To: amradio@mailman.qth.net > > Well, from the lack of responses I'm guessing this must be one of > the > rarest parts known to the AM community. > > So one final request... Anyone who may have an > extra/not > needed 9-pin male plug for the accessory socket on the Ranger I > (and > would be willing to part with i) please contact me off the list. > > Thanks for looking. > > Best 73 de W4MIL > Chuck > Palm Coast, FL > ___ _ > More new features than ever. Check out the new AOL Mail ! - > http://o.aolcdn.com/cdn.webmail.aol.com/mailtour/aol/en- > us/text.htm? ncid=aolcmp000503__ > 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.
[AMRadio] Information needed on e.f johnson variable
I think this is a EFJ product. Small air variable, with numbers 149-13-3 on it. Maybe Hammurlund? Does anyone have information on this little critter? I need to know its capacitance thanks in advance W5SUM - Ronnie __ 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] Wanted: 9-pin accessory plug for Ranger I
When I got my Ranger, I replaced my 9 pin with an 11 pin socket and plug combo when I found that the plug was cracked. Never had a problem with the 11 pin units. The 11 pin combos are far more readily available. Pete, wa2cwa On Thu, 06 Dec 2007 08:56:57 -0500 [EMAIL PROTECTED] writes: > > Well, from the lack of responses I'm guessing this must be one of > the > rarest parts known to the AM community. > > So one final request... Anyone who may have an extra/not > > needed 9-pin male plug for the accessory socket on the Ranger I (and > > would be willing to part with i) please contact me off the list. > > Thanks for looking. > > Best 73 de W4MIL > Chuck > Palm Coast, FL __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] EL34/6CA7 temporary test replacements?
My AM transmitter uses a pair of 6CA7/EL34 as modulators. I have no resting or idling current showing on the meter where ther should be 50 milliamps of idle or resting current for the two modulator tubes. I had a catastrophic flash in the 5V4 low voltage rectifier tube but the primary fuse did not blow. Whatever caused the short or overload of the 5V4 must have cleared itself such as a momentary arc. The EL 34s/6CA7s show very weak on my tube tester. One of them is about 50 percent and the other about 30 percent. The 5V4 low voltage supplies the screen voltage to the two 6CA7s. The 5V4 was replaced and there was no further arcing of the rectifier. The low voltage supply is now working. The manual says that if the High Voltage is working and there is no resting current, then there is probably no screen voltage on the 6CA7 tubes. I don't have a pair of 6CA7/EL34 tubes, at present, but would like to put tubes in the modulator to see if another pair will draw resting or idle cureent. QUESTION.WILL ANOTHER AUDIO AMPLIFIER TUBE SUBSTITUTE MERELY FOR A TEST? I have 6L6 tubes but don't know if they can be substituted for a MINUTE to see if there will be resting current. I may have some 5881s. I am ordering 6CA7/EL34 tubes, but would like to troubleshoot and have modulator ready when the tubes get here. If you can answer my question, it will be greatly appreciated. 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ 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] UTC CG-302
This auction is for an unused UTC plate transformer, Model CG-302. Primary voltage is 105, 115, 210, 220, or 230 volts AC. Secondary AC voltage is 950-750-0-750-950 volts; or you could also say either 1900 or 1500 volts AC, center-tapped. DC voltages and currents with suitable rectifiers are 760 or 610 volts in a full wave center-tapped configuration at 360 mA. In a full wave bridge configuration there will be 1520 or 1220 volts at 250 mA. These are continuous ratings and with a choke-input filter, I believe. A capacitor-input filter will give you slightly higher voltages. ICAS current ratings will be higher. I would be a little leery of using it in fullwave bridge configuration without knowing the insulation breakdown rating of the midtap. Many transformers designed for the conventional two-diode full wave CT rectifier circuit have a midtap that is not insulated for HV, so the winding insulation to ground could break down, since the tap will be at approximately half the high voltage potential with the full wave bridge. This can also be a problem when using a CT rectifier configuration with the filter choke in the negative side from midtap to ground. The tap will be at a few volts DC potential, but the ripple voltage may peak at near the voltage output of the power supply. The UTC catalogue or transformer spec sheet may or may not give this data. 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.
[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 Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ 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] Wanted: 9-pin accessory plug for Ranger I
Chuck, I saw a post several months back that someone said they were for sale -- but forget which company? I'll keep thinking... 73, John At 08:56 AM 12/6/2007, you wrote: Well, from the lack of responses I'm guessing this must be one of the rarest parts known to the AM community. So one final request... Anyone who may have an extra/not needed 9-pin male plug for the accessory socket on the Ranger I (and would be willing to part with i) please contact me off the list. Thanks for looking. Best 73 de W4MIL Chuck Palm Coast, FL __ 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] Wanted: 9-pin accessory plug for Ranger I
- Original Message - Subject: Re: [AMRadio] Wanted: 9-pin accessory plug for Ranger I Date: Thu, December 6, 2007 12:57 From: "Peter Markavage" <[EMAIL PROTECTED]> > When I got my Ranger, I replaced my 9 pin with an 11 pin socket and plug > combo when I found that the plug was cracked. Never had a problem with > the 11 pin units. The 11 pin combos are far more readily available. > > Pete, wa2cwa > I did the same. Plus, you get two more pins that can be used for the TR relay coil, instead of that silly xtal socket. Never looked back. -Larry/NE1S __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] I will trade a SX-28 for a BC348!!!
Wanted BC348 in operating condition and already converted to AC operation. Must be electrically sound. Will trade a complete SX-28 in working condition. There are some caveats however. Someone who had this in the past has done a transistorized conversion on the IF's. These transistors are mounted on tube bases. I don't know if you could pull them out and put the original tubes back in or not. This receiver does work!!! I have NO information on the conversion. Front panel is good, better than most I have seen. Cabinet is good. Lid is not warped like some. Audio Control has incorrect knob but otherwise, all knobs are good. ALL THE DEADLY paper caps in the inaccessible area under the band switch have already been changed out to orange drops by some brave soul. If you have never done this yourself.. well.. never mind. Its already done. S-meter works, dials are good. What more can I say. I'm trying to re-create on of my novice stations, thats why I want a BC348. MUST NOT have any new holes in the front panel, an S-meter or any of that crap. Just a BC348 converted to AC with the cabinet and correct knobs. A shock mount base would be nice. I think this is more than a fair trade, especially for the person that gets the SX-28. let me know and Merry Christmas to all of you fellers Ronnie - W5SUM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Texar Audio Prisms Available
I have 2 Texar Prisms for sale. I've seen these reach the $1k Mark a peice on ebay. Hows $800.00 for the Pair. These do not have the NRSC Filtering or Asymetrical Limiting in them. Some things i'm looking for in possible partial trade... 1RU Rack Mount Dual Mic Pre amp. Autogram Model: IA plug in transformer. Excalibur DA2-6 Distribution Amp. (2 of these would be excellent) Rack Mount AM/FM Monitor Receiver with Balanced Audio Outputs. NAB Engineers Handbook CD 10th Edition. Delta ASE-2 Manual. RE-27 Pop Filters FIM-41 ( one can dream :-) Hi, Hi. Rev. Robert P. Chrysafis Moderator Hunterdonfree http://groups.yahoo.com/groups/hunterdonfree __ 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] Wanted: 9-pin accessory plug for Ranger I
Yep, I did something similar. Brought relay contacts out to the extra pins to turn an "On-the-Air" sign on and off. Couldn't see wasting my time looking for a 9 pin plug. Pete, wa2cwa On Thu, 6 Dec 2007 15:18:56 -0600 (CST) [EMAIL PROTECTED] writes: > > > > > - Original Message - > Subject: Re: [AMRadio] Wanted: 9-pin accessory plug for Ranger I > Date: Thu, December 6, 2007 12:57 > From: "Peter Markavage" <[EMAIL PROTECTED]> > > > When I got my Ranger, I replaced my 9 pin with an 11 pin socket > and plug > > combo when I found that the plug was cracked. Never had a problem > with > > the 11 pin units. The 11 pin combos are far more readily > available. > > > > Pete, wa2cwa > > > > I did the same. Plus, you get two more pins that can be used for the > TR > relay coil, instead of that silly xtal socket. Never looked back. > > -Larry/NE1S __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] 8 and 11 pin plugs
Does anyone out there know where to get any of those 8 and 11 pins plugs that go in the accessory plugs in the back of the some of the AM transmitters?? Joe K4TR __ 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] 8 and 11 pin plugs
Tyr here, No connection just what Google found! http://store.triodestore.com/amphenol.html 73 Larry WA9VRH - Original Message - From: "kk4tr" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" Sent: Thursday, December 06, 2007 4:30 PM Subject: [AMRadio] 8 and 11 pin plugs Does anyone out there know where to get any of those 8 and 11 pins plugs that go in the accessory plugs in the back of the some of the AM transmitters?? Joe K4TR __ 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 think the ones from Eastern Europe are ok, I dont like the tubes from China or Russia. I have Russian 811's and the bases are loose, plate caps the wrong size, etc. I have some KT90 tubes made by EI that have been great. Brett N2DTS - Original Message - From: "John King" <[EMAIL PROTECTED]> To: 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 > > > > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ > > __ > 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
resend... John King Said: Thu, 06 Dec 2007 13:08:48 -0800 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 Reply by Jim Candela, WD5JKO: John, I have one of my QRO Central electronics 20A projects where I tried a EL-34 for RF Ab1 linear use for 160-20m. I tried the Svetlana, Sovtek, and an old vintage KT-77. None of them did as well as a Teslovak E34LS (this is not a typo, the tube number changed). This tube is carried by the Penta Laboratory folks. This tube is more robust with a higher Pd rating than the plane Jane 6CA7 / EL-34 (30w instead of 25w Pd). You will find these hi-fi tubes a little finicky because the high Gm means high gain, and variations in grid 1 bias and/or screen voltage really move the idling current a bunch. Having provision to vary the static G1 voltage is really a must, and regulating the both G1 and G2 voltages are both very desirable. In my main QRO 20a I use a pair of 7591's (get 60w PEP out) and I had to regulate the G1 bias and G2 screen to maintain a stable DC operating point for these tubes. The 7591 is kind of a baby 6550 and both are very high Gm Hi-Fi tubes. Tubes like the 6L6/5881 have lower gain, and therefore require considerably more peak grid swing. Here is the link to Penta Labs: http://www.pentalaboratories.com/Audiophile.aspx?dept_id=1516 My vote is to pay a little more and buy from Penta Labs, Regards, Jim JKO __ 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] I will trade a SX-28 for a BC348!!!
- Original Message - From: "ronnie.hull" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" Sent: Thursday, December 06, 2007 1:40 PM Subject: [AMRadio] I will trade a SX-28 for a BC348!!! Wanted BC348 in operating condition and already converted to AC operation. Must be electrically sound. Will trade a complete SX-28 in working condition. There are some caveats however. Someone who had this in the past has done a transistorized conversion on the IF's. These transistors are mounted on tube bases. I don't know if you could pull them out and put the original tubes back in or not. This receiver does work!!! I have NO information on the conversion. Front panel is good, better than most I have seen. Cabinet is good. Lid is not warped like some. Audio Control has incorrect knob but otherwise, all knobs are good. ALL THE DEADLY paper caps in the inaccessible area under the band switch have already been changed out to orange drops by some brave soul. If you have never done this yourself.. well.. never mind. Its already done. S-meter works, dials are good. What more can I say. I'm trying to re-create on of my novice stations, thats why I want a BC348. MUST NOT have any new holes in the front panel, an S-meter or any of that crap. Just a BC348 converted to AC with the cabinet and correct knobs. A shock mount base would be nice. I think this is more than a fair trade, especially for the person that gets the SX-28. let me know and Merry Christmas to all of you fellers Ronnie - W5SUM Too bad I just sold my last BC-348..!!__ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.15/1174 - Release Date: 12/6/2007 10:11 AM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] 6CA7/EL34 replacements
John King Said: Thu, 06 Dec 2007 13:08:48 -0800 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 Reply by Jim Candela, WD5JKO: John, I have one of my QRO Central electronics 20A projects where I tried a EL-34 for RF Ab1 linear use for 160-20m. I tried the Svetlana, Sovtek, and an old vintage KT-77. None of them did as well as a Teslovak E34LS (this is not a typo, the tube number changed). This tube is carried by the Penta Laboratory folks. This tube is more robust with a higher Pd rating than the plane Jane 6CA7 / EL-34 (30w instead of 25w Pd). You will find these hi-fi tubes a little finicky because the high Gm means high gain, and variations in grid 1 bias and/or screen voltage really move the idling current a bunch. Having provision to vary the static G1 voltage is really a must, and regulating the both G1 and G2 voltages are both very desirable. In my main QRO 20a I use a pair of 7591's (get 60w PEP out) and I had to regulate the G1 bias and G2 screen to maintain a stable DC operating point for these tubes. The 7591 is kind of a baby 6550 and both are very high Gm Hi-Fi tubes. Tubes like the 6L6/5881 have lower gain, and therefore require considerably more peak grid swing. Here is the link to Penta Labs: http://www.pentalaboratories.com/Audiophile.aspx?dept_id=1516 My vote is to pay a little more and buy from Penta Labs, Regards, Jim JKO __ 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
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: 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.
Re: [AMRadio] EL34/6CA7 temporary test replacements?
I converted my Apache to use 6146 tubes instead of the EL34s for the modulator. Worked like a charm. Steve WD8DAS ** Check out AOL's list of 2007's hottest products. (http://money.aol.com/special/hot-products-2007?NCID=aoltop000301) __ 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: > 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.
