20100501.ba v04_n330.bam.20100501 >From ???@??? Fri Apr 30 18:00:16 2010 -0500 Date: Sat, 1 May 2010 00:00:10 GMT From: Old Tube Radios To: Old Tube Radios Subject: BOATANCHORS digest 4330 Message-Id: <20100501000011.3DBD68941D8@minime.theporch.com> BOATANCHORS Digest 4330 Topics covered in this issue include: 1) Hallicrafters 50 kHz IF transformers - For Sale by John Sehring 2) Hallicrafters 50 kHz IF transformers - For Sale by John Sehring 3) The Lost Tribes of RadioShack by "k4pf@juno.com" 4) RE: The Lost Tribes of RadioShack by "Morris Odell" 5) Re: The Lost Tribes of RadioShack by "Arden Allen" 6) RE: The Lost Tribes of RadioShack by "Bill Hawkins" 7) RE: The Lost Tribes of RadioShack by Richard Loken 8) RE: The Lost Tribes of RadioShack by "Morris Odell" 9) 2C36 by "WA3GIN in Alex. City, VA" 10) Radio Shack Article by "Herbert M. Rosenthal" 11) Re: Radio Shack Article by "Herbert M. Rosenthal" 12) Hammarlund PRO 310 for sale by "Jim Garland" <4cx250b@muohio.edu> 13) KSM Schecule by Richard Dillman 14) Hallicrafters SX-73 and Hammarlund SPC-10 videos by "Jim Garland" <4cx250b@muohio.edu> ---------------------------------------------------------------------- Message-ID: <336090.11896.qm@web45607.mail.sp1.yahoo.com> Date: Sun, 25 Apr 2010 16:04:54 -0700 (PDT) From: John Sehring Subject: Hallicrafters 50 kHz IF transformers - For Sale To: Old Tube Radios MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Hi All, A box of five Hallicrafters 50 kHz IF transformers P/N 050-200489 emerged from the rubble that my ham shack is. This # is shown for use in the Halli SX-122 receiver. The SX-101A shows 050-200735; the SX-101 shows 050B489 (I'm guessing its the same as 050-200489); the SX-100--I don't have a parts list for, nor the SX-111; the SX-122 shows this number IF can as does the ancient ancestor to radios using the 50 kHz IFs, the S-76. These IF strips used 50, 50.5 and 50.75 kHz. I kinda think they're all basically the same xfmr. I easily tuned my SX-100 and SX-101A to those slightly differenty freqs. It is odd though that Halligan went from using this xfmr (the -489) for a while, changed for the SX-101A and the SX-115, and then back to it for the SX-122. So who needs these cans? --John WB0EQ ------------------------------ Message-ID: <61822.85749.qm@web45611.mail.sp1.yahoo.com> Date: Sun, 25 Apr 2010 16:38:27 -0700 (PDT) From: John Sehring Subject: Hallicrafters 50 kHz IF transformers - For Sale To: Old Tube Radios MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Oh, forgot...these IF cans are NOS, never used! When I had a Halli SX-101A, my plan was to wire in the same kind of "dual loop" AGC circuit that the SX-115 had. For that, I needed a 50 kHz IF can. Sadly, I never got to do it. I handled an SX-115 only once, in 1963 when I was quite young & relatively inexperienced. But I do remember the -115 as being very "smooth" in AGC action & clean (low distortion) audio (probably due to their use of negative audio feedback). The 1st AGC loop was derived from the 2nd to last IF stage (a place of not quite ultimate selectivity). It had fast attack/fast decay time constants and drove ONLY the RF stage. The 2nd AGC loop was taken from the usual place, a point of maximum selectivity, and drove the IF stages per usual, used fast attack/slow decay. (The SX-101A's single loop AGC also controlled the 1st mixer, interesting.) Halli claimed the dual loop AGC improved what they called "dynamic selectivity". A strong signal somewhat off freq (just outside of rx's IF bandpass) would cause reduced gain only in the RF stage (via the "wider" 1st AGC loop). That could reduce cross-modulation tendencies in the RF stage. At the same time, the other, "narrower" AGC loop would then drive the gain of the remaining AGC-controlled IF stages up to bring in-bandpass sigs back up. This kind of AGC ct. is unusual, no? Off the top of my head, I can't recall any other rx featuring this. I would love to have tried it! Oh well, I'm very happy with the really fast, tight, flat AGC characteristics of my Drake R-4*s and Collins 75S-3*s radios! It is really superb even when compared to some of today's rx's! --John WB0EQ ------------------------------ Mime-Version: 1.0 From: "k4pf@juno.com" Date: Mon, 26 Apr 2010 03:50:41 GMT To: Old Tube Radios Subject: The Lost Tribes of RadioShack Message-Id: <20100425.235041.3608.0@webmail23.vgs.untd.com> Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Content-Type: text/plain; charset=ISO-8859-1 RadioShack as seen by Wired. http://www.wired.com/magazine/2010/04/ff_radioshack/ ------------------------------ From: "Morris Odell" To: Old Tube Radios Subject: RE: The Lost Tribes of RadioShack Date: Mon, 26 Apr 2010 17:17:22 +1000 Message-ID: <000101cae510$83c2ce60$8b486b20$@net.au> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Language: en-au A sadly familiar story. Down here in Oz we had several parts dealers (Including Tandy) who have gone the same way. The disappearance of electronics magazines which published projects has not helped. There are still one or two dealers left here but dyed in the wool home brewers and hackers like me are a vanishing breed and finding it harder to find parts all the time. As the local industry continues to decline, the availability of remaindered and surplus parts is reduced. Engineering schools are all simulation and no solder. A well stocked junk box and good contacts among the fraternity are essential as is a willingness to buy stuff by mail order and from ebay. It's a pity because the internet is a great source of knowledge, ideas and inspiration for new projects just at a time when the supply situation is getting more difficult. 73 de Morris VK3DOC > -----Original Message----- > From: owner-boatanchors@theporch.com [mailto:owner- > boatanchors@theporch.com] On Behalf Of k4pf@juno.com > Sent: Monday, 26 April 2010 1:51 PM > To: Old Tube Radios > Subject: The Lost Tribes of RadioShack > > > > RadioShack as seen by Wired. > > http://www.wired.com/magazine/2010/04/ff_radioshack/ ------------------------------ Message-ID: <004701cae574$17f268d0$c39e480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: The Lost Tribes of RadioShack Date: Mon, 26 Apr 2010 12:09:54 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit For me it's a particularly sad irony. Sebastopol is my home town. Cohen, like we on the List, is trying to live a life of nostalgic grave digging. The last commercial bastion is the vacuum tube audio holdout industry. I don't expect it to last more than a generation or so more. "Artificial intelligence" is fast becoming the only intelligence. You see it everywhere, especially in the discourse of today's politics. No one anymore looks for guidance from leaders of science, engineering, commerce and politics. Ostensible leaders are all now targets of mean spirited disenfranchisees. We are now the subjects of hollow faced secretive research driven power brokers. All thanks to what we "tinkerers" have wrought. > A sadly familiar story. Down here in Oz we had several parts dealers (Including Tandy) who have gone the same way. The disappearance of electronics magazines which published projects has not helped. There are still one or two dealers left here but dyed in the wool home brewers and hackers like me are a vanishing breed and finding it harder to find parts all the time. As the local industry continues to decline, the availability of remaindered and surplus parts is reduced. Engineering schools are all simulation and no solder. A well stocked junk box and good contacts among the fraternity are essential as is a willingness to buy stuff by mail order and from ebay. It's a pity because the internet is a great source of knowledge, ideas and inspiration for new projects just at a time when the supply situation is getting more difficult. 73 de Morris VK3DOC .......... ------------------------------ From: "Bill Hawkins" To: Old Tube Radios Subject: RE: The Lost Tribes of RadioShack Date: Mon, 26 Apr 2010 16:37:02 -0500 Message-ID: <4A5A55C84EC94E1698480234F648A3D9@cyrus> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Ah, you've caught me at a bad time . . . Just finished a week in New Mexico, putting 1000 miles on a Nissan hybrid to visit the great museums - Very Large Array, White Sands Missile Range, Alamogordo's Space History Museum, Roswell's UFO show (that left me wondering what really happened in July of 1947 - the rest of it is not worth much), Roswell's Museum and Art Center with a recreation of Goddard's workshop and many of his artifacts, and Los Alamos for the Bradbury Museum and the Black Hole. Albuquerque (the one with the airport) had the Natural History Museum with the history of the startup of the computer age, and the Nuclear History Museum, with all the bugaboos of the early cold war. So, I have some perspective on this at age 72: You can't go home again; you wouldn't recognize it. The only constant is change, and change is accelerating (but nowhere near Kurzweil's Singularity). Technology has made it possible for the human population to grow without limit, until the great die-back. We will exceed the Earth's carrying capacity. DNA is a marvelous replicator, except when it fails. It has made it possible for some humans to have the morals of a dinosaur because their brain has no connection to the forebrain (I'd rather have a bottle in front of me than a frontal lobotomy). Stone Age leaders and followers still exist. Their concerns are grabbing new territory and eliminating threats from people who are not like them. In short, Radio Shack (born in Boston as a wonderful place to buy WW II surplus (ask me how I know)) has no chance to survive by selling to a diminishing number of people who can do things for themselves, if they can get and assemble the parts. I wish it were different folks, but that's the way our DNA crumbles. And that's why the aliens who sensed our atomic explosions have quarantined us. This would be a good time to listen to "The Merry Minuet" - "They're rioting in Africa > . . ." God help us all, if possible. Bill Hawkins -----Original Message----- From: Arden Allen Sent: Monday, April 26, 2010 2:10 PM To: Old Tube Radios Subject: Re: The Lost Tribes of RadioShack For me it's a particularly sad irony. Sebastopol is my home town. Cohen, like we on the List, is trying to live a life of nostalgic grave digging. The last commercial bastion is the vacuum tube audio holdout industry. I don't expect it to last more than a generation or so more. "Artificial intelligence" is fast becoming the only intelligence. You see it everywhere, especially in the discourse of today's politics. No one anymore looks for guidance from leaders of science, engineering, commerce and politics. Ostensible leaders are all now targets of mean spirited disenfranchisees. We are now the subjects of hollow faced secretive research driven power brokers. All thanks to what we "tinkerers" have wrought. > A sadly familiar story. Down here in Oz we had several parts dealers (Including Tandy) who have gone the same way. The disappearance of electronics magazines which published projects has not helped. There are still one or two dealers left here but dyed in the wool home brewers and hackers like me are a vanishing breed and finding it harder to find parts all the time. As the local industry continues to decline, the availability of remaindered and surplus parts is reduced. Engineering schools are all simulation and no solder. A well stocked junk box and good contacts among the fraternity are essential as is a willingness to buy stuff by mail order and from ebay. It's a pity because the internet is a great source of knowledge, ideas and inspiration for new projects just at a time when the supply situation is getting more difficult. 73 de Morris VK3DOC .......... ------------------------------ Date: Mon, 26 Apr 2010 15:45:15 -0600 (MDT) From: Richard Loken Subject: RE: The Lost Tribes of RadioShack To: Old Tube Radios Cc: Old Tube Radios MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII On Mon, 26 Apr 2010, Bill Hawkins wrote: > This would be a good time to listen to "The Merry Minuet" - "They're > rioting in Africa > . . ." > > God help us all, if possible. Amen brother. They're rioting in Africa There's strife in Iran What nature doesn't do to us Will be done by our fellow man -- Richard Loken VE6BSV, Unix System Administrator : "Anybody can be a father Athabasca University : but you have to earn Athabasca, Alberta Canada : the title of 'daddy'" ** richardlo@admin.athabascau.ca ** : - Lynn Johnston ------------------------------ From: "Morris Odell" To: Old Tube Radios Subject: RE: The Lost Tribes of RadioShack Date: Tue, 27 Apr 2010 07:48:48 +1000 Message-ID: <000301cae58a$40bbd6a0$c23383e0$@net.au> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01CAE5DE.1267E6A0" Content-Language: en-au This is a multi-part message in MIME format. ------=_NextPart_000_0004_01CAE5DE.1267E6A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I was an engineer and a ham when I got married to the sister of another engineer. My mother warned her what she was letting herself in for J Even though engineering doesn't win the bread around here any more, I remind her of that whenever she starts to go down that path ... Morris From: Jim Isbell, W5JAI [mailto:jim.isbell@gmail.com] Sent: Tuesday, 27 April 2010 1:02 AM To: vilgotch@bigpond.net.au Subject: Re: The Lost Tribes of RadioShack And the worst enemy of the "home brewer" is the spouse. I have a huge garage (10 car garage with only 5 cars in it) that is full of "junk box stuff" and my wife wants the garage cleaned up. One day I will acquiesce and the collection will be gone. On Mon, Apr 26, 2010 at 2:17 AM, Morris Odell wrote: A sadly familiar story. Down here in Oz we had several parts dealers (Including Tandy) who have gone the same way. The disappearance of electronics magazines which published projects has not helped. There are still one or two dealers left here but dyed in the wool home brewers and hackers like me are a vanishing breed and finding it harder to find parts all the time. As the local industry continues to decline, the availability of remaindered and surplus parts is reduced. Engineering schools are all simulation and no solder. A well stocked junk box and good contacts among the fraternity are essential as is a willingness to buy stuff by mail order and from ebay. It's a pity because the internet is a great source of knowledge, ideas and inspiration for new projects just at a time when the supply situation is getting more difficult. 73 de Morris VK3DOC > -----Original Message----- > From: owner-boatanchors@theporch.com [mailto:owner- > boatanchors@theporch.com] On Behalf Of k4pf@juno.com > Sent: Monday, 26 April 2010 1:51 PM > To: Old Tube Radios > Subject: The Lost Tribes of RadioShack > > > > RadioShack as seen by Wired. > > http://www.wired.com/magazine/2010/04/ff_radioshack/ ------=_NextPart_000_0004_01CAE5DE.1267E6A0 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_0004_01CAE5DE.1267E6A0-- ------------------------------ From: "WA3GIN in Alex. City, VA" To: Old Tube Radios Subject: 2C36 Date: Tue, 27 Apr 2010 20:08:55 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0000_01CAE645.774D7FA0" This is a multi-part message in MIME format. ------=_NextPart_000_0000_01CAE645.774D7FA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Folks, I found this old tube while cleaning out a drawer. Anyone one want it just email me direct. Don't know if it is any good. Will give it away for postage cost. If it works good send me a few bucks extra. 73, dave wa3gin@COMCAST.NET ------=_NextPart_000_0000_01CAE645.774D7FA0 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_0000_01CAE645.774D7FA0-- ------------------------------ Message-ID: <4BD86213.1000300@comcast.net> Date: Wed, 28 Apr 2010 10:28:03 -0600 From: "Herbert M. Rosenthal" MIME-Version: 1.0 To: Old Tube Radios Subject: Radio Shack Article Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Will someone please refer me to the RS article about a week ago... Boston, I believe... Offline, please. Thanks, Herb W5AN ------------------------------ Message-ID: <4BD884D8.3060104@comcast.net> Date: Wed, 28 Apr 2010 12:56:24 -0600 From: "Herbert M. Rosenthal" MIME-Version: 1.0 To: Old Tube Radios Subject: Re: Radio Shack Article Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Thanks to all for, the speedy response on the RS article; no further response is required. What a great source of info :-). Herb W5AN 73's de Paul Beckwith K2LMQ Kingman, AZ and k4pf@juno.com wrote: >Hi, Herb > > ... > > > ------------------------------ From: "Jim Garland" <4cx250b@muohio.edu> To: Old Tube Radios Subject: Hammarlund PRO 310 for sale Date: Wed, 28 Apr 2010 22:36:41 -0600 Message-ID: <003e01cae755$92a08430$bd00a8c0@Garland> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Gang, I got an email from from an ex-ham (ex-WB4HJT) named Rex Brooks at jasserb@homesc.com who has a Hammarlund PRO-310 (grey/silver) that he's had for 35 years and would now like to sell. He says it works like it did when it was new, but that he wants a lighter radio. (Of course, almost any radio is lighter than a PRO-310). If anybody is interested, pse contact Rex directly at jasserb@homesc.com I don't know Rex personally and we didn't discuss price. 73, Jim W8ZR ------------------------------ Message-ID: <3340958.1272560848492.JavaMail.root@elwamui-mouette.atl.sa.earthlink.net> Date: Thu, 29 Apr 2010 10:07:28 -0700 (GMT-07:00) From: Richard Dillman To: Old Tube Radios Subject: KSM Schecule Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit KSM early CW press and weather and RTTY service will be unavailable on 8 and 15 May. MRHS Transmitter Supervisor Steve Hawes, who provides these services from the transmitter site, will be out of town on these dates. Other KSM operations including traffic service, traffic list at 2100gmt and weather at 2130gmt (CW) will be available. K6KPH will be available as usual. RD ================================= Richard Dillman Chief Operator, Coast Station KSM Maritime Radio Historical Society http://www.radiomarine.org ================================= ------------------------------ From: "Jim Garland" <4cx250b@muohio.edu> To: Old Tube Radios Subject: Hallicrafters SX-73 and Hammarlund SPC-10 videos Date: Fri, 30 Apr 2010 14:19:01 -0600 Message-ID: <00fd01cae8a2$61dc3d50$bd00a8c0@Garland> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit [I originally posted this a few weeks ago, but don't think it ever appeared. If it did, sorry for wasting the bandwidth] Hi Gang, I recently acquired the above two radios and about a half dozen others as part of a package purchase, in order to get the one radio I really wanted (an SX-88). Unfortunately, I don't have room for all the stuff, so am planning to sell most of it (probably on eBay for these two items, since they're uncommon enough that I don't have an idea of their value). However, because the SX-73 and SPC-10 are seldom seen, I thought I'd try my hand at demoing them on YouTube for those who haven't encountered them previously. This is my first YouTube effort and is shockingly amateurish. Mostly, I've learned that I don't have a future as a TV pundit or talk show host (not that the world needs more of either). Anyway, if you're interested, you can see these two radios in operation at http://www.youtube.com/watch?v=Yku0GzCiBw8 (SX-73) http://www.youtube.com/watch?v=z01YufAYKD0 (SPC-10) 73, Jim W8ZR ------------------------------ End of BOATANCHORS Digest 4330 ******************************