20090116.ba v04_n239.bam.20090116 >From ???@??? Fri Jan 16 17:40:18 2009 -0600 Date: Fri, 16 Jan 2009 17:39:13 CST From: Old Tube Radios To: Old Tube Radios Subject: BOATANCHORS digest 4239 Message-Id: <20090116233915.9739110B155@srvr1.theporch.com> BOATANCHORS Digest 4239 Topics covered in this issue include: 1) Re: GB> Wiring up a spark coil? by "Ed Sieb" 2) Wiring up a spark coil by "Ed Sieb" 3) Re: Looking for Hallicrafters SX-110 coils by Mike Steussy 4) Re: GB> Wiring up a spark coil? by Ed White WA3BZT 5) Kenyon Modulation Transformer by "Wilson Lamb" 6) FS: Master Oscillator for Cdn Marconi TH-41 Transmitter by Jerry Proc 7) reinventing the wheel by "Morris Odell" 8) R 390A parts by wb3fau@att.net 9) R390A users group by wb3fau@att.net 10) 1700 Kc or lower Crystal Needed by "B. Smith" 11) Re: Talk about old radio gear. by "David Stinson" 12) Correction: Re: Talk about old radio gear. by "David Stinson" 13) Dave's Note About "Old Radio Gear" by "Liles Garcia" 14) Allied Electronics ? by "Chuck Grandgent" 15) New Homebrew Project Video by "Jim Garland" <4cx250b@muohio.edu> 16) Re: Allied Electronics ? by WA5CAB@cs.com 17) Re: Allied Electronics ? by "Paul Christensen" 18) Re: [Milsurplus] Insulated Gate Bipolar Transistors by "David Stinson" 19) RE: Allied Electronics ? by "Jim Garland" <4cx250b@muohio.edu> 20) Re: [Milsurplus] Insulated Gate Bipolar Transistors by WA5CAB@cs.com 21) Re: Allied Electronics ? by "Paul Christensen" 22) Radar TM's by Hole In The Head Press 23) Re: Radar TM's by WA5CAB@cs.com 24) Premium tube replacement guide by "David Thompson" ---------------------------------------------------------------------- Message-ID: From: "Ed Sieb" To: Old Tube Radios Subject: Re: GB> Wiring up a spark coil? Date: Sun, 11 Jan 2009 10:14:10 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit What??????? Me, put it on the air? NEVER! ;-) It'll take me a while to gather up the various components - "oscillation transformer", proper vintage spark gap, condenser (though I can probably use one of my broadcast micas), etc. I just want to assemble a replica spark TX, just for show, in the shack. Transmitting was always a secondary consideration. Ed, VA3ES ------------------------------------------------------------------- Ken N5CM wrote: I am suprised that none of the message I've read even mention that Spark Transmissions are ILLEGAL! Spark transmissions are allowed to be used in an actual "life threatening emergency", but definitely not otherwise! FWIW ------------------------------ Message-ID: From: "Ed Sieb" To: Old Tube Radios Subject: Wiring up a spark coil Date: Sun, 11 Jan 2009 10:27:01 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi All! Thanks to all who responded. My questions were answered (which is typical for these lists!). Now all I need is an "oscillation transformer", or at least a "helix", a condenser (though one of my broadcast micas will probably do), and a suitable vintage spark gap. It'll probably be a working demo unit in the shack for my own amusement, and the amusement of visitors. (Hooking up an antenna will be optional! ;-) ) 73, Ed, VA3ES ------------------------------ Message-ID: <496A171D.8000004@cox.net> Date: Sun, 11 Jan 2009 10:58:21 -0500 From: Mike Steussy MIME-Version: 1.0 To: Old Tube Radios CC: Boatanchors Subject: Re: Looking for Hallicrafters SX-110 coils Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Charles and all... If repair of the coils isn't possible and you can't find a junker SX-110, look for the coils you need in S-40B, S-85, SX-99 or S-108 parts units. According to their schematic diagrams, they're all pretty much all the same radio with different cases and very minor other differences. BTW, it was most unkind of the previous owner to have plundered the tubes from a "very restorable" radio. Someone did that with an R-100/URR a friend saved from a neighbor's trash pickup and brought me. Generous members of this list helped me re-equip it with the scarce one and three volt tubes it needed. I'm guessing other members of this list have had similar experience. 73 es GL, Mike Steussy AE4R > Last year I picked up a tubeless "very restorable" Hallicrafters SX-110 ... > It seems as though those !@#$% mice ... snacked on the wires coming off two of the pie-wound coils that comprise the first tuned circuits (on the 1st RF stage grid) for bands 1 and 2. It's not just broken, a short length is completely missing! ... > Anyone got a junker that has L2 and L3 (the coils closest to the rear corner of the chassis)? They have "051-201937" and "051-201938" printed on them. Or a source for them? ------------------------------ Date: Sun, 11 Jan 2009 11:01:12 -0500 From: Ed White WA3BZT Subject: Re: GB> Wiring up a spark coil? To: Old Tube Radios Cc: Old Tube Radios Message-id: <496A17C8.8060404@verizon.net> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit The worst that would happen is No Body will answer him and The hams that heard him will call him on the Land Line and inform him that he can not operate SPARK. Besides that he will also know his effort worked and will be able to say "It works" By time the Government people get the word he will have done it and would have stoped. End of problem. Ed WA3BZT Ken wrote: > Hi spark gap submitters, > > I am suprised that none of the message I've read even mention that > Spark Transmissions are ILLEGAL! > Spark transmissions are allowed to be used in an actual "life > threatening emergency", but definitely not otherwise! > FWIW > > Ken N5CM > > > ------------------------------ Message-ID: <93BFBB7797C64679B737EAA3872AD1C2@wilsonspc> From: "Wilson Lamb" To: Old Tube Radios Cc: "Old Tube Radios" Subject: Kenyon Modulation Transformer Date: Sun, 11 Jan 2009 16:15:36 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit I have a Kenyon modulation transformer labeled S 22456. It is not in any Kenyon literature that I can find. Does snyone have any spec's on it? It looks like a retrofit in a Hammarlund four-11 modulator that has been changed over to 6L6s. 73, Wilson W4BOH ------------------------------ Date: Sun, 11 Jan 2009 17:05:14 -0800 (PST) From: Jerry Proc Subject: FS: Master Oscillator for Cdn Marconi TH-41 Transmitter To: Old Tube Radios Cc: rmadison@suite224.net MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-ID: <231112.49524.qm@web90603.mail.mud.yahoo.com> Hello Everyone, Back in Dec 2008, I had posted a mystery device and requested identification. It has now been identified as a Master Oscillator for a Marconi TH-41 transmitter. See: http://www.jproc.ca/marconi/148017.html Richard Madison, KC8FNJ has two units for sale. He indicates that one unit is still in it's factory wrap with factory calibration sheets attached to its right side but no no manual. The other unit looks like it was bench tested, but never used. If you are interested in acquiring one of these, please contact Richard Madison directly at: -- Regards, Jerry Proc E-mail: jerry7proc@yahoo.com __________________________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now at http://ca.toolbar.yahoo.com. ------------------------------ Message-ID: <9881E56B191E4B2E93E7DBF40703C87B@Morris1> From: "Morris Odell" To: Old Tube Radios Subject: reinventing the wheel Date: Mon, 12 Jan 2009 19:14:50 +1100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Young hackers are amazed by this stuff :-) I'm pretty impressed myself. Mind you I'm not about to re-engineer my bedside VFD alarm clock (which has been waking me for 30 years without a hiccup) just yet. http://www.qrss.thersgb.net/VFD-Regen.html#VFDs_used_as_ValvesVacuum_Tubes._ May be the audiophoole community needs to adopt this technology and leave our stuff alone:-) For more hackers amazed by the old stuff and doing clever things with it, see: http://hackaday.com/ ------------------------------ From: wb3fau@att.net To: Old Tube Radios Subject: R 390A parts Date: Tue, 13 Jan 2009 01:48:29 +0000 Message-Id: <011320090148.27378.496BF2ED000E32F300006AF222216128369B0A02D29B9B0EBF9A0E00CC0D99@att.net> Anchorites- I know there is a 390A website, but there are some of you BA folks who do not go there. So, i need a band switch wafer from the RF deck. Part is designated S203. Perhaps someone has a junker RF deck they wish to part with? Russ-WB3FAU. ------------------------------ From: wb3fau@att.net To: Old Tube Radios Subject: R390A users group Date: Wed, 14 Jan 2009 00:06:34 +0000 Message-Id: <011420090006.27732.496D2C8A000E63E600006C5422230647029B0A02D29B9B0EBF9A0E00CC0D99@att.net> a few of you requested how to get to this site- here is your link http://mailman.qth.net/mailman/listinfo/r390 ------------------------------ Message-ID: <004d01c9766f$2e00edb0$271cc847@BCXHTR8HVC4P> From: "B. Smith" To: Old Tube Radios Subject: 1700 Kc or lower Crystal Needed Date: Wed, 14 Jan 2009 12:40:23 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I need one (1) 1700 kc crystal or a couple of lower frequency crystals that I can grind up to 1700 kcs for an HBR receiver project. Prefer FT-243 holder. 73 breck k4che Dover Delaware, ann't nutten in Dover except chickens, a NASCAR track, and hams that can't solder. ------------------------------ Message-ID: From: "David Stinson" To: Old Tube Radios Subject: Re: Talk about old radio gear. Date: Wed, 14 Jan 2009 22:32:46 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0039_01C97698.0612ED20" This is a multi-part message in MIME format. ------=_NextPart_000_0039_01C97698.0612ED20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Having this many examples of each type of unit is a psychologic = disorder.=20 I'll bet the canned goods in his pantry are in alphabetical order.=20 This fellow needs to see a head doctor.=20 73 D.S. ------=_NextPart_000_0039_01C97698.0612ED20 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ---REMAINDER OF MESSAGE TRUNCATED--- * * This post contains a forbidden message format * * (such as an attached file, a v-card, HTML formatting) * * Mail Lists at theporch.com only accept PLAIN TEXT * * If your postings display this message your mail program * * is not set to send PLAIN TEXT ONLY and needs adjusting * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ------=_NextPart_000_0039_01C97698.0612ED20-- ------------------------------ Message-ID: <98E3881BB5934ECF877C3697DE22180E@boudreaux> From: "David Stinson" To: Old Tube Radios Subject: Correction: Re: Talk about old radio gear. Date: Wed, 14 Jan 2009 22:35:45 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0041_01C97698.70A04CF0" This is a multi-part message in MIME format. ------=_NextPart_000_0041_01C97698.70A04CF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Scratch that. I thought you meant this was his "collection,"=20 but it's a business inventory. My mistake. ------=_NextPart_000_0041_01C97698.70A04CF0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ---REMAINDER OF MESSAGE TRUNCATED--- * * This post contains a forbidden message format * * (such as an attached file, a v-card, HTML formatting) * * Mail Lists at theporch.com only accept PLAIN TEXT * * If your postings display this message your mail program * * is not set to send PLAIN TEXT ONLY and needs adjusting * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ------=_NextPart_000_0041_01C97698.70A04CF0-- ------------------------------ Date: Wed, 14 Jan 2009 22:46:00 -0800 From: "Liles Garcia" Subject: Dave's Note About "Old Radio Gear" To: Old Tube Radios Message-id: MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7bit Good evening Everybody, Hey Dave, How about sending the List a link so that all of us can see this fellow's collection/business inventory. It sounds interesting!! Many thanks!! Best regards from Aloha, Oregon, Liles Garcia landn2@verizon.net ------------------------------ Message-ID: Date: Thu, 15 Jan 2009 17:00:40 -0500 From: "Chuck Grandgent" To: Old Tube Radios Subject: Allied Electronics ? MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline On a whim I did a Google on "Allied Electronics" and were surprised they are still around, they sure were a mainstay when I was growing up. There are two reviews of them on eHam.net, both favorable, and one noting they have no minimum order, something I could not find the answer to on their website. They seem to have decent prices for high-voltage electrolytics. Anybody here have any experience with them ? Chuck, K1OM ------------------------------ From: "Jim Garland" <4cx250b@muohio.edu> To: Old Tube Radios Subject: New Homebrew Project Video Date: Thu, 15 Jan 2009 15:26:11 -0700 Message-ID: <005d01c97760$47332630$bd00a8c0@Garland> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005E_01C97725.9AD44E30" This is a multi-part message in MIME format. ------=_NextPart_000_005E_01C97725.9AD44E30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Gang, As some of you may know, I've recently built a master station controller for operating my vintage stations. IMy daughter gave me a camcorder for Xmas and I've just made my first video, which features the station controller. If you've got 14 minutes to burn, you can see it by clicking on the "CLIICK HERE" text at http://w8zr.net/homebrew/StationPro.htm Actually, I'd be interested in knowing if it loads and plays correctly, using both Windows and Apple-based browsers. Also, any suggestions or comments would be most welcome. It is, I am afraid, not an academy award winning production. Thanks & 73 Jim W8ZR ------=_NextPart_000_005E_01C97725.9AD44E30 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ---REMAINDER OF MESSAGE TRUNCATED--- * * This post contains a forbidden message format * * (such as an attached file, a v-card, HTML formatting) * * Mail Lists at theporch.com only accept PLAIN TEXT * * If your postings display this message your mail program * * is not set to send PLAIN TEXT ONLY and needs adjusting * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ------=_NextPart_000_005E_01C97725.9AD44E30-- ------------------------------ From: WA5CAB@cs.com Message-ID: Date: Thu, 15 Jan 2009 17:27:48 EST Subject: Re: Allied Electronics ? To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_d29.3b4d415d.36a11264_boundary" --part1_d29.3b4d415d.36a11264_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I've had an account with them for years. I don't buy a lot from them but when I do have gotten good service. They once special ordered from Simpson ('cause Simpson wouldn't sell to me) the battery substitute adaptors for the 260 Series 5P. I've bought a little and a lot and got treated the same way in either case. In a message dated 1/15/2009 4:03:21 PM Central Standard Time, chuck@chuckg.com writes: > On a whim I did a Google on "Allied Electronics" and were surprised > they are still around, they sure were a mainstay when I was growing > up. > > There are two reviews of them on eHam.net, both favorable, and one > noting they have no minimum order, something I could not find the > answer to on their website. > They seem to have decent prices for high-voltage electrolytics. > > Anybody here have any experience with them ? Robert Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_d29.3b4d415d.36a11264_boundary Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ---REMAINDER OF MESSAGE TRUNCATED--- * * This post contains a forbidden message format * * (such as an attached file, a v-card, HTML formatting) * * Mail Lists at theporch.com only accept PLAIN TEXT * * If your postings display this message your mail program * * is not set to send PLAIN TEXT ONLY and needs adjusting * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --part1_d29.3b4d415d.36a11264_boundary-- ------------------------------ Message-ID: <000b01c97776$0ce377d0$063ca8c0@Dorm> From: "Paul Christensen" To: Old Tube Radios Subject: Re: Allied Electronics ? Date: Thu, 15 Jan 2009 20:02:05 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original Content-Transfer-Encoding: 7bit > On a whim I did a Google on "Allied Electronics" and were surprised > they are still around, they sure were a mainstay when I was growing > up. Anybody here have any experience with them ? > Anybody here have any experience with them ? I continue to use them as a major parts supplier for homebrew projects. In order of use, these are my top parts vendors: 1) Mouser; 2) Allied; 3) Digi-Key; 4) Newark. For industrial parts and hardware, I tend to gravitate to Grainger and McMaster-Carr. Excellent service from all of the above. Paul, W9AC ------------------------------ Message-ID: From: "David Stinson" To: Old Tube Radios Subject: Re: [Milsurplus] Insulated Gate Bipolar Transistors Date: Thu, 15 Jan 2009 19:40:15 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit How on earth did these get posted again?? I didn't post them. ------------------------------ From: "Jim Garland" <4cx250b@muohio.edu> To: Old Tube Radios Subject: RE: Allied Electronics ? Date: Thu, 15 Jan 2009 19:02:48 -0700 Message-ID: <008001c9777e$8a3fa020$bd00a8c0@Garland> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit For new "retail" parts, I use 1) Mouser (a fabulous company, very fast shipping, reasonable prices, no minimum charge, great salespeople, easy-to-use search engine) 2) Jameco (limited stock, catalog with pretty pictures, lots of power supplies, transformers, Chinese-made parts, but good prices) 3) Digikey (good company and inventory, but an irritating $25 minimum charge -- and from a company founded by a ham, no less) 4) Newark (I got out of the habit of shopping Allied, but I'll revisit) Surplus, overstock, cool oddball items (1) Marlin P. Jones (www.mpja.com) I love this company and their monthly special emails always brighten my day (2) All Electronics, MCM, etc. -- all pretty much tied And at the bottom.....Surplus Sales of Nebraska 73, Jim W8ZR > -----Original Message----- > From: owner-boatanchors@theporch.com [mailto:owner- > boatanchors@theporch.com] On Behalf Of Paul Christensen > Sent: Thursday, January 15, 2009 6:02 PM > To: Old Tube Radios > Subject: Re: Allied Electronics ? > > > On a whim I did a Google on "Allied Electronics" and were surprised > > they are still around, they sure were a mainstay when I was growing > > up. Anybody here have any experience with them ? > > > Anybody here have any experience with them ? > > I continue to use them as a major parts supplier for homebrew projects. > In > order of use, these are my top parts vendors: > > 1) Mouser; > 2) Allied; > 3) Digi-Key; > 4) Newark. > > For industrial parts and hardware, I tend to gravitate to Grainger and > McMaster-Carr. > > Excellent service from all of the above. > > Paul, W9AC ------------------------------ From: WA5CAB@cs.com Message-ID: Date: Thu, 15 Jan 2009 21:41:34 EST Subject: Re: [Milsurplus] Insulated Gate Bipolar Transistors To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_c5e.4ad70461.36a14dde_boundary" --part1_c5e.4ad70461.36a14dde_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Must be that long delay echo we've heard about. :-) In a message dated 1/15/2009 7:43:28 PM Central Standard Time, arc5@ix.netcom.com writes: > How on earth did these get posted again?? I didn't post them. Robert Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_c5e.4ad70461.36a14dde_boundary Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ---REMAINDER OF MESSAGE TRUNCATED--- * * This post contains a forbidden message format * * (such as an attached file, a v-card, HTML formatting) * * Mail Lists at theporch.com only accept PLAIN TEXT * * If your postings display this message your mail program * * is not set to send PLAIN TEXT ONLY and needs adjusting * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --part1_c5e.4ad70461.36a14dde_boundary-- ------------------------------ Message-ID: <02e801c97808$152f1b50$063ca8c0@Dorm> From: "Paul Christensen" To: Old Tube Radios Subject: Re: Allied Electronics ? Date: Fri, 16 Jan 2009 13:27:26 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit > 1) Mouser (a fabulous company, very fast shipping, reasonable prices, no > minimum charge, great salespeople, easy-to-use search engine) And an ability to create a large B.O.M. for group projects. A while back, I purchased W8ZR's R.F. distribution amp in kit form. With what amounted to the click of a single button on the Mouser website, a macro loads the project's B.O.M., into your shopping cart -- and even suggests alternate components if stock is unavailable. That's a powerful feature from Mouser. Paul, W9AC ------------------------------ Message-ID: <4970F3E4.1050204@sonic.net> Date: Fri, 16 Jan 2009 12:53:56 -0800 From: Hole In The Head Press MIME-Version: 1.0 To: Old Tube Radios Subject: Radar TM's Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Does anyone have manuals for the SCR-588 and SCR-516 radars? Thanks, -- Sam Stokes, Publisher, KG6WYZ 3rd Edition of Rings of Supersonic Steel The Last Missile Site www.holeintheheadpress.com ------------------------------ From: WA5CAB@cs.com Message-ID: Date: Fri, 16 Jan 2009 17:17:58 EST Subject: Re: Radar TM's To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_d1d.3b68e755.36a26196_boundary" --part1_d1d.3b68e755.36a26196_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit The SCR-516 is covered in the '44 SCR-268 TM's. In a message dated 1/16/2009 2:54:40 PM Central Standard Time, sestokes@sonic.net writes: > Does anyone have manuals for the SCR-588 and SCR-516 radars? > > Thanks, > Robert Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_d1d.3b68e755.36a26196_boundary Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ---REMAINDER OF MESSAGE TRUNCATED--- * * This post contains a forbidden message format * * (such as an attached file, a v-card, HTML formatting) * * Mail Lists at theporch.com only accept PLAIN TEXT * * If your postings display this message your mail program * * is not set to send PLAIN TEXT ONLY and needs adjusting * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --part1_d1d.3b68e755.36a26196_boundary-- ------------------------------ Message-ID: <005401c97833$8ef0f0f0$8e679a04@yourxb2x7j77gn> From: "David Thompson" To: Old Tube Radios Subject: Premium tube replacement guide Date: Fri, 16 Jan 2009 18:32:28 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit In looking through an old 73 for November 1962 I came across a 2 page guide for a lot of those 4 digit premium tubes. Like the 1614 is a premium 6L6. I have a sleive of 5726's which are 6AL5's. There are about 5 or 6 listings for 6AL5 replacements. The Author, Roy Pafenberg, W4WKM gives you warnings on some such as 5933 (807) with a 3" greater base diameter. Oh, the article is on pages 46 and 47. Sorry no scanner on this PC. Now if only I could find a listing for Mullard valves. 73 Dave K4JRB ------------------------------ End of BOATANCHORS Digest 4239 ******************************