20091110.ba v04_n296.bam.20091110 >From ???@??? Tue Nov 10 09:06:26 2009 -0600 Date: Tue, 10 Nov 2009 09:06:18 CST From: Old Tube Radios To: Old Tube Radios Subject: BOATANCHORS digest 4296 Message-Id: <20091110150625.B1C1F19B29@sco.theporch.com> BOATANCHORS Digest 4296 Topics covered in this issue include: 1) Diagrams that Can't be Read.... by "David Stinson" 2) Re: BNC connector by John Oglesby 3) RE: BNC connector by "Jim Garland" <4cx250b@muohio.edu> 4) Re: BNC connector by "RICHARD GEORGE" 5) URM-25D Attenuator by John Oglesby 6) Re: BNC connector by "David Thompson" 7) Another average hamshack by n6nae@ix.netcom.com 8) Re: Another average hamshack by "David Stinson" 9) Re: Another average hamshack by Robert Kemp 10) Re: Another average hamshack by Jack Harper 11) RE: Another average hamshack by Clark Thompson 12) Re: Another average hamshack by mac 13) Re: Another average hamshack by Niel Wiegand 14) Re: Another average hamshack by Dave Ragsdale 15) Re: URM-25D Attenuator by "k4pf@juno.com" 16) Re: Another average hamshack by spr@earthlink.net 17) Re: URM-25D Attenuator by John Oglesby 18) Re: Another average hamshack by john 19) Re: Another average hamshack by "Al Parker" 20) Re: Another average hamshack by WA1KBQ@aol.com 21) Re: Another average hamshack by wb3fau@att.net 22) Re: BNC connector by "Arden Allen" 23) Re: Another average hamshack by "Guido" 24) Another average ham shack by "Les Zwiebel WB6ORZ" 25) ART-13 Power Cable, Ideas? by "Michael Hardie" ---------------------------------------------------------------------- Message-ID: <6084A9205D3B497AA35749318A8CB433@boudreaux> From: "David Stinson" To: Old Tube Radios Subject: Diagrams that Can't be Read.... Date: Mon, 9 Nov 2009 05:45:00 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit God bless those who take the time and effort to post diagrams for the community, but, gently: There are many diagrams posted that were scanned at such poor resolution, they can't be read. i.e. search for SCR-223. That doesn't do anyone any good. Thank you for your effort, but please consider that. ------------------------------ Message-ID: <4AF820BE.1020200@charter.net> Date: Mon, 09 Nov 2009 09:01:34 -0500 From: John Oglesby MIME-Version: 1.0 To: Old Tube Radios Subject: Re: BNC connector Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Morris - A quick look at a couple of BNC suppliers show 500V RMS max with the dielectric rated at 1500V. That BNC on the test gear is either a special connector that looks like a BNC, or a big mistake! John N9RE Morris Odell wrote: > Hi all, > > A few days ago I was asking about a manual for a Philips HV power supply > that came begging for a new home. Well I installed a safe power connector > and found that it works! However the output connector is a BNC. This is > intended to handle up to 6 kV. Is that a safe situation? The supply is a > real professional piece of lab gear with special quality tubes and all, but > a BNC seems rather risky for 6 kV. > > Does anyone know how far a BNC can be pushed voltage wise? > > 73, Morris > > ------------------------------ From: "Jim Garland" <4cx250b@muohio.edu> To: Old Tube Radios Subject: RE: BNC connector Date: Mon, 9 Nov 2009 07:09:38 -0700 Message-ID: <032d01ca6146$47291480$bd00a8c0@Garland> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Morris, There are several types of BNC connectors that are specifically designed for HV use. Many of these are made by Kings, such as their MHV series. I'm guessing that's what your Philips power supply is using. HV BNCs require special mating plugs, and will not work with ordinary BNC connectors. I"ve been using a Kings MHV BNC to run HV from a homebrew power supply to my 8877 desktop amp. I use red-jacketed RG58 coax to distinguish it from the other BNC cables behind the desk. The 8877 amp runs at 4700V (no load), and I"ve used it for twenty years with no problem. For safety reasons, I always prefer to use shielded cable for exposed HV leads. That way if somebody trips over the cable, the braid will provide a path to ground. The worst HV connectors, in my opinion, are the old Millen HV connectors, such as used on the back of the Drake L4B. They're just accidents waiting to happen, since there's not even a strain relief on the HV cable. The HV wire is supported only by the solder joint. Jim Garland W8ZR > -----Original Message----- > From: owner-boatanchors@theporch.com [mailto:owner-boatanchors@theporch.com] On > Behalf Of Morris Odell > Sent: Monday, November 09, 2009 3:28 AM > To: Old Tube Radios > Subject: BNC connector > > Hi all, > > A few days ago I was asking about a manual for a Philips HV power supply > that came begging for a new home. Well I installed a safe power connector > and found that it works! However the output connector is a BNC. This is > intended to handle up to 6 kV. Is that a safe situation? The supply is a > real professional piece of lab gear with special quality tubes and all, but > a BNC seems rather risky for 6 kV. > > Does anyone know how far a BNC can be pushed voltage wise? > > 73, Morris ------------------------------ Message-ID: From: "RICHARD GEORGE" To: Old Tube Radios Subject: Re: BNC connector Date: Mon, 9 Nov 2009 06:10:56 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01CA6103.6684B610" This is a multi-part message in MIME format. ------=_NextPart_000_0025_01CA6103.6684B610 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It probably is not a standard BNC connector but a HVBNC. A normal BNC = connector will not mate with it. K6KWQ Dick Amps by "MORE POWER" ----- Original Message -----=20 From: Morris Odell=20 To: Old Tube Radios=20 Sent: Monday, November 09, 2009 2:27 AM Subject: BNC connector Hi all, A few days ago I was asking about a manual for a Philips HV power = supply that came begging for a new home. Well I installed a safe power = connector and found that it works! However the output connector is a BNC. This = is intended to handle up to 6 kV. Is that a safe situation? The supply is = a real professional piece of lab gear with special quality tubes and = all, but a BNC seems rather risky for 6 kV. Does anyone know how far a BNC can be pushed voltage wise? 73, Morris ------=_NextPart_000_0025_01CA6103.6684B610 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_0025_01CA6103.6684B610-- ------------------------------ Message-ID: <4AF82A29.4080303@charter.net> Date: Mon, 09 Nov 2009 09:41:45 -0500 From: John Oglesby MIME-Version: 1.0 To: Old Tube Radios Subject: URM-25D Attenuator Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit My URM-25D has a bad output attenuator. It fails the resistance test specified in the manual on most ranges and also doesn't work worth a hoot! It appears to have more than one open resistor. Before I look for substitute resistors, I thought I would see if anyone on the list had a defunct unit with a good attenuator that might be applied to my problem. Anybody have an attenuator they can spare? Price? - Thanks John N9RE ------------------------------ Message-ID: <001101ca615c$d8d0d290$085b9a04@yourxb2x7j77gn> From: "David Thompson" To: Old Tube Radios Subject: Re: BNC connector Date: Mon, 9 Nov 2009 11:51:04 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit I had a commercial Hammond Power supply that used a PL-259 to deliver 1600 V as output. I agree that using anything like a PL-259 or BNC is dangerous. W4NU is going to incorporate the power supply to power his 500 watt home brew amp to match his home brew 40 meter receiver he uses with a T4X. John got one of the nice HV connectors from Surplus sales (but they can be cheaper elsewhere). Seems that during the late 1970's and early 80's that commercial power supply makers tried to cut cost corners by using coax type connectors. Beware and replace! Dave K4JRB ------------------------------ Message-ID: <16114185.1257785764165.JavaMail.root@mswamui-thinleaf.atl.sa.earthlink.net> Date: Mon, 9 Nov 2009 08:56:03 -0800 (GMT-08:00) From: n6nae@ix.netcom.com To: Old Tube Radios Subject: Another average hamshack Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Not sure if this has been posted before. Worth a look. http://www.qrz.com/db/w9evt Richard ------------------------------ Message-ID: From: "David Stinson" To: Old Tube Radios Subject: Re: Another average hamshack Date: Mon, 9 Nov 2009 11:09:58 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original Content-Transfer-Encoding: 7bit Lord; I hope he's got his estate-sale ducks in a row. Otherwise, the vultures are going to peck his wife down to the bones.... ------------------------------ Message-ID: <4AF84D48.2070004@bobkemp.com> Date: Mon, 09 Nov 2009 11:11:36 -0600 From: Robert Kemp MIME-Version: 1.0 To: Old Tube Radios CC: Old Tube Radios Subject: Re: Another average hamshack Content-Type: multipart/mixed; boundary="------------010405020101050105000303" This is a multi-part message in MIME format. --------------010405020101050105000303 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Ya...that looks almost like mine! Bob wa0vrc n6nae@ix.netcom.com wrote: > Not sure if this has been posted before. Worth a look. > http://www.qrz.com/db/w9evt > Richard > > > --------------010405020101050105000303 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --------------010405020101050105000303-- ------------------------------ Date: Mon, 09 Nov 2009 10:34:52 -0700 To: Old Tube Radios From: Jack Harper Subject: Re: Another average hamshack Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1"; format=flowed Content-Transfer-Encoding: quoted-printable Message-Id: <20091109173452.59A5522DE83@mpls-qmqp-04.inet.qwest.net> At 09:56 AM 11/9/2009, N6NAE said: >Not sure if this has been posted before. Worth a look. >http://www.qrz.com/db/w9evt >Richard Gee - I wonder if he has ever powered everything up all at once :)) Keys down would dim some lights here and there... Regards to the List - Jack, W=D8YJ ("Friend to all Things Hammarlund") Evergreen, Colorado USA ------------------------------ MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Date: Mon, 09 Nov 2009 11:41:03 -0600 From: Clark Thompson Subject: RE: Another average hamshack To: Old Tube Radios Message-id: <003f01ca6163$cef80de0$1401a2c0@ad.education.wisc.edu> Content-transfer-encoding: quoted-printable Keep in mind that his shack is on an island that is only accessible by = ferry or plane! There is one submerged cable supplying all the primary power = to the island (I visited the island in August, be not W9EVT's shack). Clark, K9OA=20 -----Original Message----- From: owner-boatanchors@theporch.com = [mailto:owner-boatanchors@theporch.com] On Behalf Of Jack Harper Sent: Monday, November 09, 2009 11:35 AM To: Old Tube Radios Subject: Re: Another average hamshack At 09:56 AM 11/9/2009, N6NAE said: >Not sure if this has been posted before. Worth a look. >http://www.qrz.com/db/w9evt >Richard Gee - I wonder if he has ever powered everything up all at once :)) Keys down would dim some lights here and there... Regards to the List - Jack, W=D8YJ ("Friend to all Things Hammarlund") Evergreen, Colorado USA ------------------------------ Cc: Old Tube Radios Message-Id: <67327F30-26A5-45C1-8C2D-E5DDBB3E53B3@aol.com> From: mac To: Old Tube Radios Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v936) Subject: Re: Another average hamshack Date: Mon, 9 Nov 2009 09:58:02 -0800 Too much of a good thing....... Dennis D. W7QHO Glendale, CA On Nov 9, 2009, at 8:56 AM, n6nae@ix.netcom.com wrote: > Not sure if this has been posted before. Worth a look. > http://www.qrz.com/db/w9evt > Richard > ------------------------------ Message-ID: <4AF85B96.5050500@aggienetwork.com> Date: Mon, 09 Nov 2009 12:12:38 -0600 From: Niel Wiegand MIME-Version: 1.0 To: Old Tube Radios Subject: Re: Another average hamshack Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit It looks like W9EVT has cabins are for rent in a picturesque part of Wisconsin. Rentals come with shack privileges. Might make for a fun vacation. 73, Niel - W0VLZ http://w0vlz.blogspot.com/ n6nae@ix.netcom.com wrote: > Not sure if this has been posted before. Worth a look. > http://www.qrz.com/db/w9evt > Richard > > > ------------------------------ Message-ID: <4AF85CF8.1080104@ragsdale.net> Date: Mon, 09 Nov 2009 10:18:32 -0800 From: Dave Ragsdale MIME-Version: 1.0 To: Old Tube Radios Subject: Re: Another average hamshack Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Only one R-390 in all that? Heresy! > > n6nae@ix.netcom.com wrote: >> Not sure if this has been posted before. Worth a look. >> http://www.qrz.com/db/w9evt >> Richard >> >> >> > > > -- Dave Ragsdale dave@ragsdale.net ------------------------------ Mime-Version: 1.0 From: "k4pf@juno.com" Date: Mon, 9 Nov 2009 18:45:11 GMT To: Old Tube Radios Subject: Re: URM-25D Attenuator Message-Id: <20091109.134511.24974.0@webmail07.vgs.untd.com> Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Content-Type: text/plain; charset=ISO-8859-1 >John Oglesby N9RE wrote My URM-25D has a bad output attenuator. It fails the resistance test = specified in the manual on most ranges and also doesn't work worth a = hoot!... Hi, John You might check this catalog item from Fair Radio: https://www.fairradio.com/catalog.php?mode=3Dviewitem&item=3D939 I don't know if that is from the URM-25D or -25F = or whatever suffix letter. 73, Ed Knobloch ------------------------------ Message-ID: <18636676.1257792522837.JavaMail.root@elwamui-little.atl.sa.earthlink.net> Date: Mon, 9 Nov 2009 13:48:42 -0500 (EST) From: spr@earthlink.net To: Old Tube Radios Subject: Re: Another average hamshack Cc: Old Tube Radios Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Nothing exceeds like excess, and this looks like joyous excess. Go for it! /scott ------------------------------ Message-ID: <4AF88A0B.2010703@charter.net> Date: Mon, 09 Nov 2009 16:30:51 -0500 From: John Oglesby MIME-Version: 1.0 CC: Old Tube Radios Subject: Re: URM-25D Attenuator Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: Old Tube Radios I took the advice of several folks and ordered a new (used) one from Fair Radio. For $26 it isn't worth the effort to track down precision resistors, etc. Thanks for all the help! John N9RE John Oglesby wrote: > My URM-25D has a bad output attenuator. It fails the resistance test > specified in the manual on most ranges and also doesn't work worth a > hoot! It appears to have more than one open resistor. Before I look > for substitute resistors, I thought I would see if anyone on the list > had a defunct unit with a good attenuator that might be applied to my > problem. Anybody have an attenuator they can spare? Price? - Thanks > > John > N9RE > > ------------------------------ Message-Id: <6.2.1.2.2.20091109171532.048c4110@pop-server.nc.rr.com> Date: Mon, 09 Nov 2009 17:16:02 -0500 To: Old Tube Radios From: john Subject: Re: Another average hamshack Cc: Old Tube Radios Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed That's really cool... what a nice way to enjoy retirement. John K5MO ------------------------------ Message-ID: <3CDE880A5A9148EAB0E3950BDC922BA1@AWPLAP> From: "Al Parker" To: Old Tube Radios Subject: Re: Another average hamshack Date: Mon, 9 Nov 2009 17:32:31 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit I just got home to see all this furor. The link was posted on some list a few wks ago. Seing John's post reminded me of a phrase he and the rest of us area BA collectors use (often), "Anything worth doing is worth overdoing". 73, Al, W8UT New Bern, NC www.boatanchors.org www.hammalund.info ----- Original Message ----- From: "john" To: "Old Tube Radios" Cc: "Old Tube Radios" Sent: Monday, November 09, 2009 5:16 PM Subject: Re: Another average hamshack > That's really cool... what a nice way to enjoy retirement. > > John K5MO > ------------------------------ From: WA1KBQ@aol.com Message-ID: Date: Mon, 9 Nov 2009 18:54:00 EST Subject: Re: Another average hamshack To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1257810840" -------------------------------1257810840 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Only one SX-88? -Greg -------------------------------1257810840 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -------------------------------1257810840-- ------------------------------ From: wb3fau@att.net To: Old Tube Radios Subject: Re: Another average hamshack Date: Tue, 10 Nov 2009 01:05:41 +0000 Message-Id: <111020090105.18998.4AF8BC650008DA4900004A3622218683269B0A02D29B9B0EBF9A0E00CC0D99@att.net> nice collection! did anyone "see" what he does not have? Ans- Collins KW-1. [or rice boxes] ------------------------------ Message-ID: <009301ca61a8$b2fff7c0$fc9d480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: BNC connector Date: Mon, 9 Nov 2009 17:33:58 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > Morris, There are several types of BNC connectors that are specifically > designed for HV use. .... I'll back Jim up on his info. I've worked on Siemens radiotherapy machines that use high power klystrons. The MHV is the connector of choice. The MHV types have an extended insulator compared to a BNC, the breakdown/leakage path is much longer. The coax used must be solid dielectric, not foam. Gas ionizes. Peak current capability for the MHV is modest. Don't be fooled into thinking hot disconnect/connect is OK, just shut the damn thing off first. Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <008a01ca61ac$c74e0a10$4000000a@CPQ10443900021> From: "Guido" To: Old Tube Radios Subject: Re: Another average hamshack Date: Mon, 9 Nov 2009 22:23:21 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Compared to that, my shack looks like a small closet!! 73s Guido Santacana KP4FAR ------------------------------ Message-ID: <0D1851338EF84421A6ACE034E1EDCE04@Shack> From: "Les Zwiebel WB6ORZ" To: Old Tube Radios Subject: Another average ham shack Date: Mon, 9 Nov 2009 20:47:11 -0800 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit The guy is a serious ham and lover of the hobby. Proof is on the 8th slide down at his QRZ site, top shelf...there it is I believe, the dreaded Wouff Hong... purveyor of unthinkable treatment to a Ham with bad operating technique. Kind of makes you scared just thinking about it. (((((73))))) Les ---===WB6ORZ===--- ----- Original Message ----- From: "Al Parker" To: "Old Tube Radios" Sent: Monday, November 09, 2009 2:32 PM Subject: Re: Another average hamshack >I just got home to see all this furor. The link was posted on >some list a few wks ago. > Seing John's post reminded me of a phrase he and the rest > of us area BA collectors use (often), "Anything worth doing > is worth overdoing". > 73, > Al, W8UT > New Bern, NC > www.boatanchors.org > www.hammalund.info > > ----- Original Message ----- > From: "john" > To: "Old Tube Radios" > Cc: "Old Tube Radios" > Sent: Monday, November 09, 2009 5:16 PM > Subject: Re: Another average hamshack > > >> That's really cool... what a nice way to enjoy retirement. >> >> John K5MO >> > ------------------------------ Message-ID: <83C453D65AC94A1AB7FF71701AE0EF17@userd0315415c7> From: "Michael Hardie" To: Old Tube Radios Subject: ART-13 Power Cable, Ideas? Date: Tue, 10 Nov 2009 07:05:55 -0800 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit I'm constructiong an AC power supply and connecting cable for an ART-13 transmitter. It is preferable to have a connector at both ends of the cable. I have the correct plug for the Tx end but the P/S end is a problem. The two extremes the connector/receptacle has to handle are 28 volts at about 10 amps and around 1200 volts at 1/4 amp. There are a total of 10 pins on the Tx end plug. Anyone have ideas on a plug and receptacle? (Preferably easily available) Mike VE7MMH ------------------------------ End of BOATANCHORS Digest 4296 ******************************