20091113.ba v04_n297.bam.20091113 >From ???@??? Fri Nov 13 01:23:03 2009 -0600 Date: Fri, 13 Nov 2009 01:22:56 CST From: Old Tube Radios To: Old Tube Radios Subject: BOATANCHORS digest 4297 Message-Id: <20091113072303.379CF19B18@sco.theporch.com> BOATANCHORS Digest 4297 Topics covered in this issue include: 1) ARC-5 Dynamotor by "Gary Harmon" 2) Re: ART-13 Power Cable, Ideas? by aafradio 3) Re: ART-13 Power Cable, Ideas? by "Jay H. Miller" 4) Re: ART-13 Power Cable, Ideas? by WA5CAB@cs.com 5) Re: ART-13 Power Cable, Ideas? by wb3fau@att.net 6) Bump her all the time! by "Leo Mendoza" 7) Re: ART-13 Power Cable, Ideas? by WA5CAB@cs.com 8) Re: ART-13 Power Cable, Ideas? by aafradio 9) Re: ART-13 Power Cable, Ideas? by "Jay H. Miller" 10) AN/FRR-51 receiver - What is it? by Nick England 11) DX-100 xmtr mods by Art Lebermann 12) Re: DX-100 xmtr mods by Chuck Grandgent 13) Re: DX-100 xmtr mods by John Dilks K2TQN 14) Unbeatable prices on Explorer and GMT Master . Get him a mont blanc pen by 15) RE:[MorseCode] Vibroplex for sale by John Dilks K2TQN 16) Re: DX-100 xmtr mods by "Art Lebermann" 17) LED Flashlights Aren't Collector (or Human) Friendly by WA5CAB@cs.com 18) Re: LED Flashlights Aren't Collector (or Human) Friendly by Scott Robinson ---------------------------------------------------------------------- From: "Gary Harmon" To: Old Tube Radios Subject: ARC-5 Dynamotor Date: Tue, 10 Nov 2009 09:28:57 -0600 Message-ID: <5CF69454541C4C04A61ABD40F65874EB@GaryHarmonJrPC> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_03B2_01CA61E8.3A9A7B30" This is a multi-part message in MIME format. ------=_NextPart_000_03B2_01CA61E8.3A9A7B30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit With a R-390 and Viking I, came a clean looking ARC-5 dynamotor unit. Any demand for these? Anyone restoring a set and needing one? Let me know. 73, Gary H. Harmon, Jr. - K5JWK 6003 Archwood San Antonio, TX 78239-1504 210.657.1549h 210.884.6926c ------=_NextPart_000_03B2_01CA61E8.3A9A7B30 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_03B2_01CA61E8.3A9A7B30-- ------------------------------ Message-ID: <4AF9CE30.8040908@aafradio.org> Date: Tue, 10 Nov 2009 15:33:52 -0500 From: aafradio MIME-Version: 1.0 To: Old Tube Radios CC: Old Tube Radios Subject: Re: ART-13 Power Cable, Ideas? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Michael Hardie wrote: > 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) That's an easy one. There is a fairly common Amphenol 10 pin connector that is essentially identical to the rarer Cannon connector on the transmitter. The pin configuration (28-19) is somewhat similar, and the insert is roughly the same size. Bill Perry will have both chassis mount (MS-3102-) and cable connector (MS-3106-) for a reasonable cost, and will mail them by postal system. 73, Mike KC4TOS ------------------------------ Mime-Version: 1.0 Message-Id: Date: Tue, 10 Nov 2009 15:13:51 -0600 To: Old Tube Radios From: "Jay H. Miller" Subject: Re: ART-13 Power Cable, Ideas? Cc: boatanchors@theporch.com Content-Type: text/plain; charset="iso-8859-1" ; format="flowed" Content-Transfer-Encoding: quoted-printable I have the power supply end of my ART13 cable=20 tied off to a terminal strip (HV on a separate=20 strip just for safety) on the supply chassis. I=20 laced the cable (with waxed cable lacing and tied=20 Collins knots), put a shield over it and some=20 loom over that. Looks real "military." Just never figured there would be a need to (a)=20 locate and (b) solder-up two more connectors. *********** jay@kk5im.com *********** Jay H. Miller, KK5IM Dallas, Texas NRA * ARRL * DXCC * S.A.S.S. #34,692 32=B0 AASR * MVPA #25,180 Website: http://www.kk5im.com ***** Proud to be 100% Macintosh since 1984! ***** ------------------------------ From: WA5CAB@cs.com Message-ID: Date: Tue, 10 Nov 2009 16:55:00 EST Subject: Re: ART-13 Power Cable, Ideas? To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_c9c.550d2106.382b3b34_boundary" --part1_c9c.550d2106.382b3b34_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I also have, or can assemble, the original connectors as used on or with the dynamotor. But they are roughly twice the cost of the much more common AN or MS connectors. If you ever have any intention of getting and using a dynamotor, I'd go with them or you'll just have to try to find them later and rebuild the cable or make another one.. But if the AC supply is all you ever intend to use, go with the AN connectors. They're cheaper and will work just as well. If Bill doesn't have them (unlikely), I have at least one pair. In a message dated 11/10/2009 2:34:57 PM Central Standard Time, mike_25-z@aafradio.org writes: > Michael Hardie wrote: > >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) > > That's an easy one. There is a fairly common Amphenol 10 pin connector > that is essentially identical to the rarer Cannon connector on the > transmitter. The pin configuration (28-19) is somewhat similar, and the > insert is roughly the same size. Bill Perry will have both chassis > mount (MS-3102-) and cable connector (MS-3106-) for a reasonable cost, > and will mail them by postal system. > Robert & Susan Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_c9c.550d2106.382b3b34_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_c9c.550d2106.382b3b34_boundary-- ------------------------------ From: wb3fau@att.net To: Old Tube Radios Cc: "Jay H. Miller" , boatanchors@theporch.com Subject: Re: ART-13 Power Cable, Ideas? Date: Tue, 10 Nov 2009 23:36:20 +0000 Message-Id: <111020092336.8517.4AF9F8F4000E05230000214522230704929B0A02D29B9B0EBF9A0E00CC0D99@att.net> I agree with you Jay. I do not like the idea ofrunning the HI B+ in that harness. Also, Mike, you did not mention the LOW B+ in your comment? I think its about 350 VDC. Russ. ------------------------------ Date: Wed, 11 Nov 2009 00:20:36 +0100 From: "Leo Mendoza" Message-ID: <775256799.67515999805898@roovay.com> To: Old Tube Radios Subject: Bump her all the time! MIME-Version: 1.0 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 7bit 

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You are receiving this communication because you subscribed shimshon@sco.theporch.com at our site. If for any reason you wish to stop receiving this communication, click on this Unsubscribe link. This will create a new email that contains your unsubscribe request. Please send that email to us, and we will reply back confirming the completion of your unsubscription request.
------------------------------ From: WA5CAB@cs.com Message-ID: Date: Tue, 10 Nov 2009 19:02:45 EST Subject: Re: ART-13 Power Cable, Ideas? To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_d26.441f2f32.382b5925_boundary" --part1_d26.441f2f32.382b5925_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Well, one can say that it worked fine in thousands of aircraft for decades. The BC-191 and BC-375 are set up the same way (HV in the same cable as 12/24 VDC and control). The output rating of the Eicor DY-17A Low B+ winding is 409-462 VDC @ 750 mA. Below 21,000-25,000 feet MSL the Low B+ winding is in series with the High B+ winding which accounts for 350 mA of the 750 rated. The High B+ is 1177-1297 VDC below 21,000-25,000 feet and 768-835 VDC above. The other several dynamotors have similar ratings. In a message dated 11/10/2009 5:36:58 PM Central Standard Time, wb3fau@att.net writes: > I agree with you Jay. I do not like the idea ofrunning the HI B+ in > that harness. Also, Mike, > you did not mention the LOW B+ in your comment? I think its about 350 > VDC. Russ. > Robert Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_d26.441f2f32.382b5925_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_d26.441f2f32.382b5925_boundary-- ------------------------------ Message-ID: <4AFA0A5E.8020702@aafradio.org> Date: Tue, 10 Nov 2009 19:50:38 -0500 From: aafradio MIME-Version: 1.0 To: Old Tube Radios Subject: Re: ART-13 Power Cable, Ideas? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Oh my goodness, yes. Robert is right on. The most common solution for a cable pack is insulation breakdown on the HV wire, and I have several examples here of *vinyl sleeving* added to 600v wire to reach 2 or 3 kilovolt levels. The engineers responsible for designing these incredibly over-engineered sets were no dummies. The Amphenol connector I suggested is good to 2,450vdc on the center pin. That should get you by on an ART-13... :-) Robert Downs wrote: Well, one can say that it worked fine in thousands of aircraft for decades. In a message dated 11/10/2009 5:36:58 PM Central Standard Time, wb3fau@att.net writes: > I agree with you Jay. I do not like the idea of running the HI B+ in > that harness. Also, Mike, > you did not mention the LOW B+ in your comment? I think its about 350 > VDC. Russ. > ------------------------------ Mime-Version: 1.0 Message-Id: Date: Tue, 10 Nov 2009 19:07:52 -0600 To: Old Tube Radios From: "Jay H. Miller" Subject: Re: ART-13 Power Cable, Ideas? Content-Type: text/plain; charset="iso-8859-1" ; format="flowed" Content-Transfer-Encoding: quoted-printable >In a message dated 11/10/2009 5:36:58 PM Central=20 >Standard Time, wb3fau@att.net writes: >>I agree with you Jay. I do not like the=20 >>idea of running the HI B+ in that harness.=20 >>Also, Mike, you did not mention the LOW B+ in=20 >>your comment? I think its about 350 VDC.=20 >>Russ. I did not say the HV lines were NOT in my cable.=20 I DID say that the 1200vdc terminal strip on the=20 power supply chassis is separated from the other=20 one with the rest of the voltages. Sorry if I confused anyone. *********** jay@kk5im.com *********** Jay H. Miller, KK5IM Dallas, Texas NRA * ARRL * DXCC * S.A.S.S. #34,692 32=B0 AASR * MVPA #25,180 Website: http://www.kk5im.com ***** Proud to be 100% Macintosh since 1984! ***** ------------------------------ MIME-Version: 1.0 Date: Wed, 11 Nov 2009 11:11:50 -0500 Message-ID: Subject: AN/FRR-51 receiver - What is it? From: Nick England To: Old Tube Radios Content-Type: text/plain; charset=ISO-8859-1 Anyone ever heard of the following? Navy AN/FRR-51 dual-diversity HF receiving system with 10 channel auto-tune (0.5-32 mc) components - R-792/URR receiver (2 ea.) CU-560/URR antenna coupler C-2087/URR receiver control C-2086/URR remote switching control CV-116/URR dual diversity FSK converter CV-395/U Signal Data Converter CY-1119/U cabinet Googling didn't show up anything except on the CV-116 and I know what that is. Above info from a September 1956 Nomenclature Card according to a Navy ESO publication Anyone? Anyone? What about this theory - I read somewhere that Hoffman Labs developed a receiver but it never made it into production - could this R-792 nomenclature have been assigned for this system that never got built? Time frame seems right, CV-116 was a Hoffman design, and Hoffman supplied FRR-38 diversity systems (2 R-390 + CV-116) - would have been a logical step for them to make an R-391 competitor? (Note this FRR-51 is not a relabeled R-391 based system - R-391 had 8 channels, not 10, and also required a 28v supply for the autotune) cheers, Nick K4NYW www.navy-radio.com > ------------------------------ Message-ID: <25459540.1257960220002.JavaMail.root@elwamui-muscovy.atl.sa.earthlink.net> Date: Wed, 11 Nov 2009 09:23:39 -0800 (GMT-08:00) From: Art Lebermann To: Old Tube Radios Subject: DX-100 xmtr mods Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Does anyone know of a mod to Heathkit DX-100 transmitters that would install a second tube socket on the top of the VFO box? I'm starting restoration of a DX-100, and noted the "extra" tube socket. Thanks! Art Lebermann W6REQ ------------------------------ MIME-Version: 1.0 Date: Wed, 11 Nov 2009 18:52:26 -0500 Message-ID: Subject: Re: DX-100 xmtr mods From: Chuck Grandgent To: Old Tube Radios Cc: Old Tube Radios Content-Type: multipart/alternative; boundary=000e0cd4ce406c06b30478211eea --000e0cd4ce406c06b30478211eea Content-Type: text/plain; charset=UTF-8 Once upon a time such transmitters often had a "crystal oscillator" adapter, to allow for its use by novice hams who were restricted to XTAL control. Perhaps it is for that. Chuck, K1OM On Wed, Nov 11, 2009 at 12:23 PM, Art Lebermann wrote: > > Does anyone know of a mod to Heathkit DX-100 transmitters that would > install a second tube socket on the top of the VFO box? I'm starting > restoration of a DX-100, and noted the "extra" tube socket. > > Thanks! > Art Lebermann > W6REQ > > --000e0cd4ce406c06b30478211eea 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --000e0cd4ce406c06b30478211eea-- ------------------------------ Date: Wed, 11 Nov 2009 19:43:58 -0500 To: Old Tube Radios From: John Dilks K2TQN Subject: Re: DX-100 xmtr mods Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Message-Id: <20091112004746.CFB1519B28@sco.theporch.com> Perhaps it is a regulator tube, but that is a strange place to put it. Tracing the wiring should prove or disprove this. 73, John At 06:52 PM 11/11/2009, you wrote: >Once upon a time such transmitters often had a "crystal oscillator" adapter, >to allow for its use by novice hams who were restricted to XTAL control. >Perhaps it is for that. > > Chuck, K1OM > >On Wed, Nov 11, 2009 at 12:23 PM, Art Lebermann wrote: > > > > > Does anyone know of a mod to Heathkit DX-100 transmitters that would > > install a second tube socket on the top of the VFO box? I'm starting > > restoration of a DX-100, and noted the "extra" tube socket. > > > > Thanks! > > Art Lebermann > > W6REQ > > > > ------------------------------ Message-ID: <000d01ca634d$3e269cf0$6400a8c0@ingratiateur3> To: Old Tube Radios Subject: Unbeatable prices on Explorer and GMT Master . Get him a mont blanc pen Date: Wed, 11 Nov 2009 22:04:33 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01CA634D.3E269CF0" This is a multi-part message in MIME format. ------=_NextPart_000_0007_01CA634D.3E269CF0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable a, a:link, a:visited=20 a, a:link, a:visited \{color: #005da9;text-decoration:none;} a:hover {color: #005da9;text-decoration: underline;} =20 =20 Email=20 not displaying correctly? View it in=20 your browser=2E =20 =20 =20 =20 =20 =20 =20 =20 =20   =20 =20 =20 =20 =20 =20 =20 November=A02009 =20 Most Popular Last Month =20 =20 2010 brand new=20 models! =20 Free=20 Shipping! =20 =20 =20 Get your gifts ;-) =20 =20 =20 Collector's editions for latest watch designs=20 =20 Shop online at our discounted price watch store for t= he latest models this ChristmasRing the bell here=A0 =20 Newsletter=20 Archive=A0| Subscribe=A0|=20 Contact=20 us =20 Manage=20 My Subscription (including unsubscribe).2009=20 Bright Sand Blevins's Company. All rights reserved. Terms= =20 of=20 Use=2E ------=_NextPart_000_0007_01CA634D.3E269CF0 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_0007_01CA634D.3E269CF0-- ------------------------------ Date: Thu, 12 Nov 2009 18:04:12 -0500 To: Old Tube Radios From: John Dilks K2TQN Subject: RE:[MorseCode] Vibroplex for sale Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Message-Id: <20091112230617.72DEC19B35@sco.theporch.com> Thanks Boris, S57LO, for the notice..... Mitch is selling Vibroplex http://members.tcq.net/nzeronv/files/vibroplex-for-sale_cq_2009-11_p67.jpg 73, John Dilks, K2TQN ------------------------------ Message-ID: <380-22009115130294078@earthlink.net> From: "Art Lebermann" To: Old Tube Radios Cc: "Old Tube Radios" Subject: Re: DX-100 xmtr mods Date: Thu, 12 Nov 2009 16:29:40 -0800 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII The DX-100 has a selector switch for VFO and four crystals (sockets inside cabinet, on top of chassis), so that's not it - though a good guess! I'll pull the VFO box and check the wiring. ART W6REQ > [Original Message] > From: Chuck Grandgent > To: Old Tube Radios > Cc: Old Tube Radios > Date: 11/11/2009 3:53:05 PM > Subject: Re: DX-100 xmtr mods > > Once upon a time such transmitters often had a "crystal oscillator" adapter, > to allow for its use by novice hams who were restricted to XTAL control. > Perhaps it is for that. > > Chuck, K1OM > > On Wed, Nov 11, 2009 at 12:23 PM, Art Lebermann wrote: > > > > > Does anyone know of a mod to Heathkit DX-100 transmitters that would > > install a second tube socket on the top of the VFO box? I'm starting > > restoration of a DX-100, and noted the "extra" tube socket. > > > > Thanks! > > Art Lebermann > > W6REQ > > > > ------------------------------ From: WA5CAB@cs.com Message-ID: Date: Fri, 13 Nov 2009 00:13:12 EST Subject: LED Flashlights Aren't Collector (or Human) Friendly To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_cdb.5f854d8f.382e44e8_boundary" --part1_cdb.5f854d8f.382e44e8_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Groups, There is a big push on by the environmental nuts to replace all incandescandent lamps with something else, often LED's. Here in Houston they are replacing all of the traffic lamps and school zone lamps with them. The red's are generally OK. Visible under most conditions. The yellows not so much, and the greens so bad that I have gotten in the habit of assuming that if a traffic lamp isn't red, it must be green. And blowing through it. But tonight, I discovered a problem with LED lamps that isn't life threatening but is quite aggravating. To vintage military radio collectors, anyway. What started it is that for whatever reason, the final maniual on the TS-382(*)/U audio oscillator covers the A, B, D, E and F models but skips the C. Naturally, I have three C models. I discovered that I also have a very poor partial copy of an early un-numbered Instruction Book coverering the A and C models. So I'm trying to add the C to the main TM. Not pertinent to this tale but as it turns out, the C is more like the A than the B. And the majority of differences are in component physical location rather than differences in the schematic. So I'm trying to ID components and edit the photos of the A model to match the C model. As in most military sets (and very few civilian ones), the component circuit symbol designators are stenciled on the chassis or on the terminal boards. The ones on the chassis are no real problem. But the ones on the dark brown terminal boards, which are also coated in MFP varnish, I found I just couldn't read using the lighting in the shack so I got out both of the small LED flashlights I've been keeping on the bench since receiving them as freebies with equipment I've bought this year. I got out some Q-tips and water and washed down the boards and was able to read a couple, but with difficulty. Then I went in the machine shop part of the shack and got the small incandescent MagLite I still have and shined it on one of the stenciled designators. It was clearly legible as C109. Back to the LED lamp and I could barely make out the 9 through the blue-white glare, but the rest was invisible. The two LED lamps are now in the S-can (I salvaged the AA batteries). Robert Downs - Houston wa5cab dot com (Web Store) MVPA 9480 --part1_cdb.5f854d8f.382e44e8_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_cdb.5f854d8f.382e44e8_boundary-- ------------------------------ Mime-Version: 1.0 Message-Id: Date: Thu, 12 Nov 2009 23:22:33 -0800 To: Old Tube Radios From: Scott Robinson Subject: Re: LED Flashlights Aren't Collector (or Human) Friendly Content-Type: text/plain; charset="us-ascii" ; format="flowed" Scott comments: I agree that the light isn't as good (line spectrum vs. black-body haystack spectrum) but the batteries will last several time longer, which can be very important if you're not at home. Trade-offs, they're everywhere. /scott At 12:13 AM -0500 11/13/09, WA5CAB@cs.com wrote: >Groups, > >There is a big push on by the environmental nuts to replace all >incandescandent lamps with something else, often LED's. Here in >Houston they are >replacing all of the traffic lamps and school zone lamps with them. The red's >are generally OK. Visible under most conditions. The yellows not so much, >and the greens so bad that I have gotten in the habit of assuming that if a >traffic lamp isn't red, it must be green. And blowing through it. > >But tonight, I discovered a problem with LED lamps that isn't life >threatening but is quite aggravating. To vintage military radio >collectors, anyway. > What started it is that for whatever reason, the final maniual on the >TS-382(*)/U audio oscillator covers the A, B, D, E and F models but >skips the C. > Naturally, I have three C models. I discovered that I also have a very >poor partial copy of an early un-numbered Instruction Book coverering the A >and C models. So I'm trying to add the C to the main TM. Not pertinent to >this tale but as it turns out, the C is more like the A than the B. And the >majority of differences are in component physical location rather than >differences in the schematic. So I'm trying to ID components and >edit the photos >of the A model to match the C model. As in most military sets (and very few >civilian ones), the component circuit symbol designators are stenciled on >the chassis or on the terminal boards. The ones on the chassis are no real >problem. But the ones on the dark brown terminal boards, which are also >coated in MFP varnish, I found I just couldn't read using the lighting in the >shack so I got out both of the small LED flashlights I've been keeping on the >bench since receiving them as freebies with equipment I've bought this year. > I got out some Q-tips and water and washed down the boards and was able to >read a couple, but with difficulty. Then I went in the machine shop part >of the shack and got the small incandescent MagLite I still have and shined >it on one of the stenciled designators. It was clearly legible as C109. >Back to the LED lamp and I could barely make out the 9 through the blue-white >glare, but the rest was invisible. > >The two LED lamps are now in the S-can (I salvaged the AA batteries). > >Robert Downs - Houston >wa5cab dot com (Web Store) >MVPA 9480 ------------------------------ End of BOATANCHORS Digest 4297 ******************************