20090222.ba v04_n247.bam.20090222 >From ???@??? Sun Feb 22 19:45:42 2009 -0600 Date: Sun, 22 Feb 2009 19:45:01 CST From: Old Tube Radios To: Old Tube Radios Subject: BOATANCHORS digest 4247 Message-Id: <20090223014503.DFE3110B021@srvr1.theporch.com> BOATANCHORS Digest 4247 Topics covered in this issue include: 1) Re: Push To Talk Switch? by "Paul Kraemer" 2) Re: Working On Hammarlund SP-10 Receiver by "Paul Kraemer" 3) Re: Working On Hammarlund SP-10 Receiver by "Arden Allen" 4) cleaning Asian potentiometers by Richard Loken 5) Re: cleaning Asian potentiometers by "Arden Allen" 6) Re: cleaning Asian potentiometers by Richard Loken 7) Re: cleaning Asian potentiometers by Scott Robinson 8) Re: cleaning Asian potentiometers by mac 9) Re: cleaning Asian potentiometers by Chuck Grandgent 10) Re: cleaning Asian potentiometers by AAFRadio 11) Re: cleaning Asian potentiometers by John Dilks K2TQN 12) Re: cleaning Asian potentiometers by AAFRadio 13) Replacement Pots by Thomas Frobase 14) Re: cleaning Asian potentiometers by "Arden Allen" 15) Re: cleaning Asian potentiometers by "Arden Allen" 16) L4 Schematic for B & W 210FA Audio Oscillator by Jim Zellmer 17) Re: [Test-Equipment] Help identifying Old Superior Electric Variac by Dennis Wade 18) Help identifying Old Superior Electric Variac by Dennis Wade 19) 8 pin jumbo socket by "RICHARD GEORGE" 20) RAK / RAL Guys by "David Stinson" 21) Re: [Milsurplus] RAK / RAL Guys by WA5CAB@cs.com 22) Re: Help identifying Old Superior Electric Variac by Scott Robinson 23) Re: Time delay relays by John 24) Pole Pig by "Wilson Lamb" ---------------------------------------------------------------------- Message-ID: From: "Paul Kraemer" To: Old Tube Radios Subject: Re: Push To Talk Switch? Date: Thu, 19 Feb 2009 09:25:33 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit Sounds like you are looking for the Astatic stand for a D-104 Paul K0UYA ----- Original Message ----- From: "Mike Hardie" To: "Old Tube Radios" Sent: Thursday, February 19, 2009 7:12 AM Subject: Push To Talk Switch? > Gents, > > I have a microphone on a desk stand that would be easier to use with a > push-to-talk switch installed. The stand has a cast base about 6" in > diameter with a vertical chrome tube that the mic threads onto. Was/is > some sort of add-on switch available, or alternately was a stand with a > built in switch made for mic's? > > Mike VE7MMH > ------------------------------ Message-ID: From: "Paul Kraemer" To: Old Tube Radios Subject: Re: Working On Hammarlund SP-10 Receiver Date: Thu, 19 Feb 2009 10:53:47 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit Fuses have voltage ratings because the rated voltage is the voltage at which the fuse can interrupt the circuit without ---exploding---for lack of a better term. There is no problem using a 250v fuse in a 120v circuit As long as you don't get mixing ac and dc rating you are fine Paul K0UYA ----- Original Message ----- From: "rjcote" To: "Old Tube Radios" Sent: Tuesday, February 17, 2009 12:32 AM Subject: Re: Working On Hammarlund SP-10 Receiver > Why do fuses dhave voltage ratings on them, such as > > Can a 3A 250v fuse be used in place of a 3A 125V fuse?? > > I would in a pinch but watch it carefully. I know that high E > applications have larger (read that longer) fuses to prevent flashover. > But the diff between 125 and 250??? > > Ray > > ------------------------------ Message-ID: <004e01c992f6$4a1e7550$169e480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: Working On Hammarlund SP-10 Receiver Date: Thu, 19 Feb 2009 16:58:00 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > Fuses have voltage ratings because the rated voltage is the voltage at [wh...ich] > the fuse can interrupt the circuit without ---exploding---for lack of a > better term. It's not an explosion that worries fuse engineers so much as a fire ignition hazard as a result of an unquenched arc. Think safety compliance issue. Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Date: Fri, 20 Feb 2009 10:10:19 -0700 From: Richard Loken Subject: cleaning Asian potentiometers To: Old Tube Radios Message-id: MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Gentlemen, I must sadly report to you that many of the rice rockets that I have known and shunned through my career are now old enough to be boat anchors. To whit: my buddy Ross VE6PDQ has just restored an Icom IC-751A to running order but the controls are noisy so he wants to clean them. I have sometimes ruined Japanese potentiometers when I cleaned them using the same dubious techniques that I used on American pots. So... What is the recommended way to clean Icom pots? -- 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 ------------------------------ Message-ID: <000d01c99399$302af210$c49e480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: cleaning Asian potentiometers Date: Fri, 20 Feb 2009 12:24:05 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > .......So... What is > the recommended way to clean Icom pots? Japanese, Taiwanese, etc. pots are not much different than everyone else's except for one feature I think the Japanese brought into the world of consumer electronics. Many Japanese pot shafts are lubricated with a viscous damping fluid that gives them the smoothness and inertia that suggests something of great quality is going on behind the front panel. The Japanese are masters of fine detail and that is one of their best examples. The problem one runs into when flooding those pots with contact cleaner is the viscous fluid may be partially disolved and what remains can evenatully lead to the pot shaft being difficult to turn or stuck tight. The correct solution (pun intended) is to use only a low solvency pot lubricant, such as Caig Fader-Lube, and to put only a very short squirt into the pot. Do the usual turning of the pot to determine that it has quieted down and then DO NOT MESS WITH IT AGAIN! If the pot remains noisy either it is worn out or DC current is flowing through the pot's rotor contact probably caused by an excessively leaky electrolytic coupling capacitor. If the pot is originally very difficult to turn lubricate the shaft with a light machine oil like 3-in-1 and allow several hours to days for the pot to become easier to turn. If that doesn't work the pot will have to be disassmbled and completely cleaned of gunk, that is, if it CAN be disassmbled. Carbon pots vary greatly in their rotation life but usually the one that is used constantly day in and day out for years is likely to eventually suffer from a worn away element. That pot needs replacement. Noisy pots that are infrequently rotated are suffering from accumulation of dust and polymers that have evaporated from wiring, circuit boards, and molded parts (remember the "new car" smell when the radio was new?). Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Date: Fri, 20 Feb 2009 13:56:49 -0700 From: Richard Loken Subject: Re: cleaning Asian potentiometers To: Old Tube Radios Cc: Old Tube Radios Message-id: MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Well thank you Arden for your information. I will pass it on to the one who will be doing the cleaning... -- 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 ------------------------------ Mime-Version: 1.0 Message-Id: Date: Fri, 20 Feb 2009 14:04:21 -0800 To: Old Tube Radios From: Scott Robinson Subject: Re: cleaning Asian potentiometers Content-Type: text/plain; charset="us-ascii" ; format="flowed" Richard, I have used Caig Laboratories DeOxit for many years on puts, tube socket switches and so forth and have nevcer had it damage anything. Regards, Scott ------------------------------ Cc: Old Tube Radios Message-Id: <7A6B19BC-ABB7-45ED-8987-573330D67687@aol.com> From: mac To: Old Tube Radios Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v930.3) Subject: Re: cleaning Asian potentiometers Date: Fri, 20 Feb 2009 14:30:33 -0800 On Feb 20, 2009, at 2:04 PM, Scott Robinson wrote: > I have used Caig Laboratories DeOxit for many years on puts, tube > socket switches and so forth and have nevcer had it damage anything. Try spraying a bug with the stuff sometime. Don't know what's in it but the lethal affect on insect life is virtually instantaneous. Agree it's also FB on electronics stuff. Dennis D. W7QHO Glendale, CA ------------------------------ MIME-Version: 1.0 Date: Fri, 20 Feb 2009 17:54:06 -0500 Message-ID: Subject: Re: cleaning Asian potentiometers From: Chuck Grandgent To: Old Tube Radios Content-Type: multipart/alternative; boundary=001636416b43aee65804636187f0 --001636416b43aee65804636187f0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit If I recall correctly, bugs "breathe" through their exoskeleton / skin, so anything that blocks that does them in in short order. Chuck, K1OM On Fri, Feb 20, 2009 at 5:30 PM, mac wrote: > > On Feb 20, 2009, at 2:04 PM, Scott Robinson wrote: > > I have used Caig Laboratories DeOxit for many years on puts, tube socket >> switches and so forth and have nevcer had it damage anything. >> > > Try spraying a bug with the stuff sometime. Don't know what's in it but > the lethal affect on insect life is virtually instantaneous. Agree it's > also FB on electronics stuff. > > Dennis D. W7QHO > Glendale, CA > > --001636416b43aee65804636187f0 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --001636416b43aee65804636187f0-- ------------------------------ Message-ID: <499F3759.7060603@aafradio.org> Date: Fri, 20 Feb 2009 18:06:01 -0500 From: AAFRadio MIME-Version: 1.0 To: Old Tube Radios CC: Old Tube Radios Subject: Re: cleaning Asian potentiometers Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit mac wrote: > On Feb 20, 2009, at 2:04 PM, Scott Robinson wrote: >> I have used Caig Laboratories DeOxit for many years on puts, tube >> socket switches and so forth and have nevcer had it damage anything. > Try spraying a bug with the stuff sometime. Don't know what's in it > but the lethal affect on insect life is virtually instantaneous. I can second this observation. I tried Caig on my Lionel J-36 and haven't been able to send a character with it since... :-) ------------------------------ Date: Fri, 20 Feb 2009 18:16:37 -0500 To: Old Tube Radios From: John Dilks K2TQN Subject: Re: cleaning Asian potentiometers Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Message-Id: <20090220231647.CB42DD530A@srvr1.theporch.com> At 06:06 PM 2/20/2009, you wrote: >I can second this observation. I tried Caig on my Lionel J-36 and >haven't been able to send a character with it since... :-) Mike, The question that comes to my mind is, could you send a character with it before? :-) 73, John ------------------------------ Message-ID: <499F4751.90800@aafradio.org> Date: Fri, 20 Feb 2009 19:14:09 -0500 From: AAFRadio MIME-Version: 1.0 To: Old Tube Radios CC: Old Tube Radios Subject: Re: cleaning Asian potentiometers Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Excellent question, John! I could send e, and a, fairly well (especially multiple e's) but now the other alphabetic characters seem to elude me. I suspect a conspiracy on the part of Caig Labs.... :-P John Dilks K2TQN wrote: > At 06:06 PM 2/20/2009, you wrote: >> I can second this observation. I tried Caig on my Lionel J-36 and >> haven't been able to send a character with it since... :-) > The question that comes to my mind is, could you send a character with > it before? ------------------------------ Message-ID: <499F49B3.8000100@kitparts.com> Date: Fri, 20 Feb 2009 18:24:19 -0600 From: Thomas Frobase MIME-Version: 1.0 To: Old Tube Radios Subject: Replacement Pots Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit A little off the current thread: I have been completing the restoration of a 51J3 which has a bad audio gain pot. I was pleased to find a replacement 500k 2 watt audio taper at Digikey which was very close to the original AB. The single unit cost was $11. Any way for what it is worth ... tom, N3LLL ------------------------------ Message-ID: <007801c993c1$62cc30d0$ad9d480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: cleaning Asian potentiometers Date: Fri, 20 Feb 2009 16:50:08 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit > If I recall correctly, bugs "breathe" through their exoskeleton / skin, so > anything that blocks that does them in in short order. It's the oil that suffocates them. The solvent just gets them stoned until it evaporates out of their system. The same exposure would kill a human. Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <007901c993c1$642705e0$ad9d480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Cc: "Old Tube Radios" Subject: Re: cleaning Asian potentiometers Date: Fri, 20 Feb 2009 17:01:22 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > Excellent question, John! I could send e, and a, fairly well > (especially multiple e's) but now the other alphabetic characters seem > to elude me. I suspect a conspiracy on the part of Caig Labs.... :-P I think that indicates long term over the toxic threshold exposure. Stop sniffing the stuff.....! Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <499F5998.7070701@ka0vsl.com> Date: Fri, 20 Feb 2009 20:32:08 -0500 From: Jim Zellmer MIME-Version: 1.0 To: Old Tube Radios Subject: L4 Schematic for B & W 210FA Audio Oscillator Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Greetings to BA folks. I have been going through some of the test equipment that I have drug home over the years and bringing it up to operational specs. I have revived the following pieces; ZM-11/U Bridge (had to rebuild a couple of the internal coils on the bridge circuit) , AN/URN-25D Signal generator (recapped per compendium notes and replaced a burnt resistor in the attenuator circuit), HP 606A Signal Generator (needed a good cleaning and had a couple of stripped nylon gears on the band switch mechanism) AN/USM-338 O-scope (two bad transistors in the channel chopper circuit) I was able to find or purchase manuals for all of this equipment which really helps in the trouble shooting, repair and operation of these pieces of test equipment. My current project is a B&W 210FA Audio Oscillator. I have not been able to find manual on the net or in the BAMA site. Does anyone in BA land have a copy of the manual or schematic for this unit? I really enjoy working on this old equipment, especially the mechanisms. 73 Jim Zellmer KA0VSL M ------------------------------ MIME-Version: 1.0 Date: Sat, 21 Feb 2009 17:12:37 -0800 Message-ID: Subject: Re: [Test-Equipment] Help identifying Old Superior Electric Variac From: Dennis Wade To: Old Tube Radios Cc: Old Tube Radios , BOATANCHORS@lists.tempe.gov, "J. Forster" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Thanks all for the replies. If there was a model number, I'd have used it. Thanks for the links to Superior Electric. Maybe some old timer wil recognize it. As far as scale is concerned, its a little over 7 inches across, and about 8 inches tall, and weighs 22 lbs. John, if you mean removing the terminal strip and taking a pic...I can probably do that if that's what you mean. Thanks again all, Dennis On Sat, Feb 21, 2009 at 3:52 PM, Mike Manes wrote: > Here's the URL for Superior Electric variacs - might get some data there: > > http://www.superiorelectric.com/POWERSTAT.htm > > From the terminal pic, looks like you strap the left-hand pair of terminals to > the 120V 60 Hz line (neutral at the bottom), and load to the RH pair. Check > function with a voltmeter. > > There's no scale in your pix, but I'd guess that it's good for at least 500 VA. > > 73 de Mike W5VSI > > Dennis Wade wrote: >> Good afternoon all, >> >> I've been moving around this old Superior Electric variac for >> years, partly because I have no information on it. >> >> Could you guys/gals take a look at it here: >> >> http://tinyurl.com/variac >> >> and tell me what you might know or reasonably assume about >> it, in particular: >> >> How to hook it up. >> >> Possible current rating range. >> >> Age. >> >> or whatever you might be able to share about it. I've had >> it for close to 20 years. >> >> Thanks! >> >> Dennis >> > > -- > Mike Manes mrmanes@gmail.com Tel: 303-979-4899 > "Things should be made as simple as possible, but not more so." > A. Einstein > ______________________________________________________________ > Test-Equipment mailing list > Home: http://mailman.qth.net/mailman/listinfo/test-equipment > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Test-Equipment@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Dennis L. Wade KG6ZI Carmichael, CA ------------------------------ MIME-Version: 1.0 Date: Sat, 21 Feb 2009 14:44:33 -0800 Message-ID: Subject: Help identifying Old Superior Electric Variac From: Dennis Wade To: Old Tube Radios Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Good afternoon all, I've been moving around this old Superior Electric variac for years, partly because I have no information on it. Could you guys/gals take a look at it here: http://tinyurl.com/variac and tell me what you might know or reasonably assume about it, in particular: How to hook it up. Possible current rating range. Age. or whatever you might be able to share about it. I've had it for close to 20 years. Thanks! Dennis -- Dennis L. Wade KG6ZI Carmichael, CA ------------------------------ Message-ID: From: "RICHARD GEORGE" To: Old Tube Radios Subject: 8 pin jumbo socket Date: Sat, 21 Feb 2009 16:00:41 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I'm looking for an 8 pin female socket. I'm going to call it a Jumbo. It is 8 pin without a center key and pin number one is larger then the remainder. I need this socket for the rear of my Gonset 66 reciever so I can apply power. Any out there? Amps by "MORE POWER" K6KWQ Dick ------------------------------ Message-ID: <8FE3A14278C04AF3AF1BC168C2E9F58B@boudreaux> From: "David Stinson" To: Old Tube Radios Subject: RAK / RAL Guys Date: Sun, 22 Feb 2009 10:17:21 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit You'll probably want to jump on this: 200312866393 ------------------------------ From: WA5CAB@cs.com Message-ID: Date: Sun, 22 Feb 2009 11:30:39 EST Subject: Re: [Milsurplus] RAK / RAL Guys To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_c77.42ebf9d0.36d2d7af_boundary" --part1_c77.42ebf9d0.36d2d7af_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit But the seller may not be terribly bright. The bat is broken out of the Set 2 ON-OFF switch. Easy fix, I'm sure. In a message dated 2/22/2009 10:17:38 AM Central Standard Time, arc5@ix.netcom.com writes: > You'll probably want to jump on this: 200312866393 Robert Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_c77.42ebf9d0.36d2d7af_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_c77.42ebf9d0.36d2d7af_boundary-- ------------------------------ Mime-Version: 1.0 Message-Id: Date: Sun, 22 Feb 2009 11:53:24 -0800 To: Old Tube Radios From: Scott Robinson Subject: Re: Help identifying Old Superior Electric Variac Content-Type: text/plain; charset="us-ascii" ; format="flowed" Hi Dennis, Looks like about a 5 Amp rating to me. The terminal board is labeled: the left two terminals are input, the right two are output. I'd fuse the output if I were you, to protect the variac from accidental overload. It might only go up to 100% of the input, or it might go beyond. Based on the scale markings around the knob, I expect it only goes up to the input voltage, but measure it to be sure. Regards, Scott ------------------------------ Message-Id: <6.2.1.2.2.20090222192204.02176b50@pop-server.nc.rr.com> Date: Sun, 22 Feb 2009 19:25:45 -0500 To: Old Tube Radios From: John Subject: Re: Time delay relays Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Well, this one's bad. Never gets below 50-60 ohms closed resistance. I jumpered the relays contacts after the warmup period, and that successfully triggered the main switching relay. Turns out AES has these new, for under $4 each. Amazing. I could do the same with a 555 and a small dip relay I suppose, but what's the fun in that? John K5MO ------------------------------ Message-ID: <94379E12439A488D98CBDFEA75CCB2A0@wilsonspc> From: "Wilson Lamb" To: Old Tube Radios Cc: Subject: Pole Pig Date: Sun, 22 Feb 2009 20:44:47 -0500 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_NextPart_000_0075_01C9952E.66919160" This is a multi-part message in MIME format. ------=_NextPart_000_0075_01C9952E.66919160 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_0075_01C9952E.66919160-- ------------------------------ End of BOATANCHORS Digest 4247 ******************************