20100425.ba v04_n329.bam.20100425 >From ???@??? Sun Apr 25 06:35:32 2010 -0500 Date: Sun, 25 Apr 2010 12:35:27 GMT From: Old Tube Radios To: Old Tube Radios Subject: BOATANCHORS digest 4329 Message-Id: <20100425123528.7722C848E27@minime.theporch.com> BOATANCHORS Digest 4329 Topics covered in this issue include: 1) Compensation Capacitor by "Paul Christensen" 2) Re: Compensation Capacitor by "Arden Allen" 3) Re: Compensation Capacitor by "Paul Christensen" 4) Re: Compensation Capacitor by "Arden Allen" 5) Re: Compensation Capacitor by "Arden Allen" 6) Re: Compensation Capacitor by "Arden Allen" 7) Broadcast Reception Licences in Canada. by Jerry Proc 8) Alcohol Flame Triode with Voltage Gain by "k4pf@juno.com" 9) 872 by "Paul Kraemer" 10) Re: 872 by "J.D. MacAulay, WQ8U" 11) Re: 872 by "J.D. MacAulay, WQ8U" 12) The Gestapo Fires a Warning Shot at Ebayers. by "David Stinson" 13) Re: The Gestapo Fires a Warning Shot at Ebayers. by Gary Woods 14) Reminder: KPH/K6KPH on for IMD by Richard Dillman 15) A Real Boatanchor by "Wilson Lamb" 16) Another Real Boatanchor, but Solid State by "Wilson Lamb" 17) Bletchley Part and the Codebreakers by Jerry Proc 18) Re: Bletchley Part and the Codebreakers by "Robert Roehrig (K9EUI)" 19) RE: 872 by "Greg Anders" 20) A Real Boat anchor by "Wilson Lamb" 21) WTB Heathkit twoer or by "RICHARD GEORGE" 22) RE: 872 by "k4pf@juno.com" 23) Re: A Real Boat anchor by "Wilson Lamb" ---------------------------------------------------------------------- Message-ID: <89D4D2E6136240428CCCAD90D3D85250@DBTOA000> From: "Paul Christensen" To: Old Tube Radios Subject: Compensation Capacitor Date: Mon, 12 Apr 2010 10:31:37 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit In a 1942 QST article, a suggestion is made to improve temperature stability of an HRO receiver's high-frequency oscillator. The author recommends a cap value of 10 pF (of course noted then as uuF) with a temperature coefficient of -0.00077 pF/pF/degree-C. Using modern components, does anyone know the EIA coefficient designator (e.., X7R, Y5V, etc.)? In going through the math, nothing I compute corresponds to the EIA designator. Tnx! Paul, W9AC ------------------------------ Message-ID: <000901cada68$92557b10$d79e480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: Compensation Capacitor Date: Mon, 12 Apr 2010 10:49:50 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > .......-0.00077 pF/pF/degree-C. ....... Let's see, if I have my decimal point in the right place, that translates to -770 ppm. The closest thing you may find in the junk box is a -750 ppm ceramic. At 10pF you may be looking for a long time. I don't think the EIA dielectric designators are worth a crap for selecting a fit capacitor. Their temperature characteristic curves look like a herd of galloping camels. What you see in a manufacturer's graph is the nominal performance characteristic. Individual capacitors will vary. Here's some stuff: http://www.niccomp.com/Products/TC_Ceramics.pdf And: http://www.brelintl.com/catalog/pdf-files/ccr_temp_coefficients_coding.pdf And: http://www.iihr.uiowa.edu/~hml/people/kruger/Publications/ChipCenter/CeramicCap.pdf Maybe you can get samples from: http://www.capaxtechnologies.com/pdffiles/TemperatureCompCaps.pdf http://www.capaxtechnologies.com/checkstock.htm Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <017b01cada69$1e485ac0$1d3ca8c0@office> From: "Paul Christensen" To: Old Tube Radios Subject: Re: Compensation Capacitor Date: Mon, 12 Apr 2010 13:53:54 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Thanks Arden, and to those that sent private replies. It appears that an EIA U2J N750 is the closest value. Paul, W9AC ----- Original Message ----- From: "Arden Allen" To: ; "Old Tube Radios" Sent: Monday, April 12, 2010 1:49 PM Subject: Re: Compensation Capacitor >> .......-0.00077 pF/pF/degree-C. ....... > > Let's see, if I have my decimal point in the right place, that translates > to -770 ppm. The closest thing you may find in the junk box is a -750 ppm > ceramic. At 10pF you may be looking for a long time. I don't think the > EIA > dielectric designators are worth a crap for selecting a fit capacitor. > Their temperature characteristic curves look like a herd of galloping > camels. What you see in a manufacturer's graph is the nominal performance > characteristic. Individual capacitors will vary. > > Here's some stuff: > > http://www.niccomp.com/Products/TC_Ceramics.pdf > > And: > > http://www.brelintl.com/catalog/pdf-files/ccr_temp_coefficients_coding.pdf > > And: > > http://www.iihr.uiowa.edu/~hml/people/kruger/Publications/ChipCenter/CeramicCap.pdf > > > Maybe you can get samples from: > > http://www.capaxtechnologies.com/pdffiles/TemperatureCompCaps.pdf > > http://www.capaxtechnologies.com/checkstock.htm > > > Arden Allen > KB6NAX > > Adopt a shelter dog, > save an innocent life, > and make a friend forever =:-) > > ------------------------------ Message-ID: <004d01cada81$80f3fb30$d79e480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: Compensation Capacitor Date: Mon, 12 Apr 2010 13:15:02 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > .......It appears that an EIA U2J N750 is the closest value. Actually U2J = N750 (am I nit picking?), one of many temp characteristics for class 1 dielectric ceramics. Now for finding one of 10pF at perhaps 500V. Where, oh where does one get one from? Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <001001cadace$e848be40$849d480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: Compensation Capacitor Date: Mon, 12 Apr 2010 23:02:10 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit CAP CERAMIC 10PF, 3KV, N750, RADIAL Dielectric Characteristic:N750 Capacitance:10pF Capacitance Tolerance:± 20% Voltage Rating:3kV Lead Spacing:6.4mm Capacitor Dielectric Type:Ceramic Disc & Plate Features:High Voltage RoHS Compliant: Yes ALLIED CANADA catalog number 46F5260 (only COG's in America) Data sheet: http://www.vishay.com/docs/23118/564565.pdf Buy a few (or more) while they exist! Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <001101cadb48$c49f8f80$a09e480c@KB6NAX> From: "Arden Allen" To: Old Tube Radios Subject: Re: Compensation Capacitor Date: Tue, 13 Apr 2010 13:34:45 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Someone suggested try RF Farts. No luck there. Maybe that's why America is adrift..... Arden Allen KB6NAX Adopt a shelter dog, save an innocent life, and make a friend forever =:-) ------------------------------ Message-ID: <358669.21602.qm@web112310.mail.gq1.yahoo.com> Date: Wed, 14 Apr 2010 16:56:48 -0700 (PDT) From: Jerry Proc Subject: Broadcast Reception Licences in Canada. To: Old Tube Radios MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Hello Everyone, I have put together a short piece on Broadcast Reception Licences in Canada. It can be found at the bottom of document: http://www.jproc.ca/marconi/freq.html Did the US ever have anything like this? -- Regards, Jerry Proc E-mail: jerry7proc@yahoo.com __________________________________________________________________ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/ ------------------------------ Mime-Version: 1.0 From: "k4pf@juno.com" Date: Sat, 17 Apr 2010 05:18:12 GMT To: Old Tube Radios Subject: Alcohol Flame Triode with Voltage Gain Message-Id: <20100417.011812.19712.0@webmail15.vgs.untd.com> Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Content-Type: text/plain; charset=ISO-8859-1 Hi, Gang This is news to me, a triode tube effect produced using an open flame, no vacuum required: http://www.sparkbangbuzz.com/flame-amp/flameamp.htm K7NS also has a YouTube posting, and you can hear the multivibrator audio oscillator he made using a dual triode flame tube: http://www.youtube.com/watch?v=3DWNl0sFViaxs I wish he didn't have the synthesized music playing during the beginning of the you-tube video, very annoying. 73, Ed Knobloch ------------------------------ Message-ID: <50B7C194569D44B0B9130B906E66CD14@ENGR2> From: "Paul Kraemer" To: Old Tube Radios Subject: 872 Date: Wed, 21 Apr 2010 16:15:20 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="Windows-1252"; reply-type=original Content-Transfer-Encoding: 7bit Does anyone still use these large mv rectifier tubes? Paul K0UYA ------------------------------ Message-ID: <71999.88097.qm@web112604.mail.gq1.yahoo.com> Date: Wed, 21 Apr 2010 14:45:58 -0700 (PDT) From: "J.D. MacAulay, WQ8U" Subject: Re: 872 To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1061336686-1271886358=:88097" --0-1061336686-1271886358=:88097 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable The Johnson Viking Desk Kilowatt; Collins 202B, 250A, and =A0KW-1 73MacWQ8UHillsborough, NC --- On Wed, 4/21/10, Paul Kraemer wrote: From: Paul Kraemer Subject: 872 To: "Old Tube Radios" Date: Wednesday, April 21, 2010, 5:15 PM Does anyone still use these large mv rectifier tubes? Paul K0UYA =0A=0A=0A --0-1061336686-1271886358=:88097 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --0-1061336686-1271886358=:88097-- ------------------------------ Message-ID: <739614.41658.qm@web112614.mail.gq1.yahoo.com> Date: Wed, 21 Apr 2010 14:48:56 -0700 (PDT) From: "J.D. MacAulay, WQ8U" Subject: Re: 872 To: Old Tube Radios MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-251907739-1271886536=:41658" --0-251907739-1271886536=:41658 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable The Johnson Viking Desk Kilowatt; Collins 202B, 250A, and =A0KW-1 73MacWQ8UHillsborough, NC From: Paul Kraemer Subject: 872 To: "Old Tube Radios" Date: Wednesday, April 21, 2010, 5:15 PM Does anyone still use these large mv rectifier tubes? Paul K0UYA =0A=0A=0A --0-251907739-1271886536=:41658 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * --0-251907739-1271886536=:41658-- ------------------------------ Message-ID: From: "David Stinson" To: Old Tube Radios Subject: The Gestapo Fires a Warning Shot at Ebayers. Date: Fri, 23 Apr 2010 08:45:09 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit For those of us who thought of our Ebay doings as like a "garage sale," where we've spent more than we can ever make and have kept no detailed records, and that the new facists wouldn't bother with "nickle and dime" sales, the Feds, ever happy to find more ways to squeeze pennies out of ordinary citizens so they can buy more votes, has fried one of it's own. Be warned: http://tinyurl.com/2wndtn6 ------------------------------ From: Gary Woods To: Old Tube Radios Subject: Re: The Gestapo Fires a Warning Shot at Ebayers. Date: Fri, 23 Apr 2010 12:46:49 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Fri, 23 Apr 2010 08:45:09 -0500, you wrote: >the new facists wouldn't bother >with "nickle and dime" sales, I dunno, but 41 kilobux is a _lot_ of nickles and dimes. Seems to me that when I ran a sideline business generating less than that, I knew it was a real good idea to keep records. Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ------------------------------ Message-ID: <11400874.1272053039207.JavaMail.root@mswamui-blood.atl.sa.earthlink.net> Date: Fri, 23 Apr 2010 13:03:59 -0700 (GMT-07:00) From: Richard Dillman To: Old Tube Radios Subject: Reminder: KPH/K6KPH on for IMD Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit KPH and K6KPH are on the air for International Marconi Day 23/24 April. KPH is running a marker on 4247kc and is working ships on 500/426kc from the control point and receiving station we have set up at the original Marconi receive site in Marshall, CA built in 1913. The transmitters at the Marconi transmit site in Bolinas, CA are being keyed remotely. When ships call on MF the KPH 4Mc transmitter is also keyed to give listeners beyond MF range a chance to hear at least one side of the contact. So for we have been in contact with SS RED OAK VICTORY/KYVM and SS JEREMIAH O'BRIEN/KXCH. We have one message on the hook for KXCH from KYVM. K6KPH will be available on 3550kc and 7050kc later in the day (around 1600pdy, 2300gmt) today and tomorrow. KPH transmitters throttled back to 1.5kW will be used. On Saturday vintage RCA transmitters from the 1950s will be used. A special QSL is available for contacts or reception reports. For more information see the MRHS Web site at: http://www.radiomarine.org See also the Marconi Conference Center Web site at: http://www.marconiconference.org/ VY 73, RD ================================= Richard Dillman Chief Operator, Coast Station KSM Maritime Radio Historical Society http://www.radiomarine.org ================================= ------------------------------ Message-ID: <64832D0A201441A4A02F95C2D3845ECB@wilsonspc> From: "Wilson Lamb" To: Old Tube Radios Subject: A Real Boatanchor Date: Fri, 23 Apr 2010 16:12:12 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit I have a REAL boatanchor, maybe 40 pounds worth, that needs a new home. HP 701-A signal generator, 370-560 MHz. No HP collection should be without one! This thing has some gorgeous RF and mechanical engineering in it, but I need the space more than the oscillator! I can pack and ship it Fedex, probably for $40 or so. I'd like to get a little something toward my next Flex rig, maybe $35. That makes it $75, shipped. Of course if anyone can pick it up in central NC it's a real bargain! I'm looking for 80 and 40m coils for a Meissner Signal Shifter and 40m coils for a Comet Pro. Wilson W4BOH ------------------------------ Message-ID: <0E40375278BB476299B59BAE4840D7FE@wilsonspc> From: "Wilson Lamb" To: Old Tube Radios Subject: Another Real Boatanchor, but Solid State Date: Fri, 23 Apr 2010 16:58:16 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit Old enough to be a BA! Wavetek VCG Model III oscillator. A venerable unit like I used in school, but NOT WORKING. Guess we'll have to call it a redo or parts car. Solid metal case and dial. $25, shipped to you! Wilson W4BOH ----- Original Message ----- From: "Wilson Lamb" To: ; Sent: Friday, April 23, 2010 4:12 PM Subject: A Real Boatanchor >I have a REAL boatanchor, maybe 40 pounds worth, that needs a new home. > HP 701-A signal generator, 370-560 MHz. No HP collection should be > without one! > > This thing has some gorgeous RF and mechanical engineering in it, but I > need the space more than the oscillator! I can pack and ship it Fedex, > probably for $40 or so. I'd like to get a little something toward my next > Flex rig, maybe $35. That makes it $75, shipped. > > Of course if anyone can pick it up in central NC it's a real bargain! > > I'm looking for 80 and 40m coils for a Meissner Signal Shifter and 40m > coils for a Comet Pro. > > Wilson > W4BOH ------------------------------ Message-ID: <316178.15284.qm@web112312.mail.gq1.yahoo.com> Date: Fri, 23 Apr 2010 17:57:46 -0700 (PDT) From: Jerry Proc Subject: Bletchley Part and the Codebreakers To: Old Tube Radios MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hello Everyone,=20 A while back, the Nova science series on Public Television featured a progr= am on Bletchley Park and the Codebreakers titled =E2=80=9CWorld War II Mind= of a Code Breaker=E2=80=9D . It=E2=80=99s a great documentary and for anyo= ne who missed it the first time around, it now available on You Tube via th= is blog:=20 http://rijmenants.blogspot.com/2010/04/mind-of-code-breaker.html The 120 minute show has been broken down to 12 segments of 10 minutes each. Enjoy!=20 -- Regards, Jerry Proc E-mail: jerry7proc@yahoo.com=0A=0A ------------------------------ Date: Fri, 23 Apr 2010 20:04:49 -0500 (CDT) From: "Robert Roehrig (K9EUI)" To: Old Tube Radios Cc: Old Tube Radios Message-ID: <379638645.13242361272071089900.JavaMail.root@mars.aurora.edu> Subject: Re: Bletchley Part and the Codebreakers MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable ----- "Jerry Proc" wrote: > Hello Everyone,=20 >=20 > A while back, the Nova science series on Public Television featured a > program on Bletchley Park and the Codebreakers titled =E2=80=9CWorld War = II > Mind of a Code Breaker=E2=80=9D . It=E2=80=99s a great documentary and fo= r anyone who > missed it the first time around, it now available on You Tube via this > blog:=20 >=20 > http://rijmenants.blogspot.com/2010/04/mind-of-code-breaker.html Anyone interested in codebreaking should get the book "The Codebreakers" by= David Kahn. Also "Kahn on Codes" and "Codes, Cyphers, and other Cryptic &= Clandestine Communication" by Fred Wrixon. Bob, K9EUI ------------------------------ From: "Greg Anders" To: Old Tube Radios Subject: RE: 872 Date: Sat, 24 Apr 2010 07:47:54 -0700 Message-ID: <01d901cae3bd$1f97da10$5ec78e30$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Language: en-us There is a 4B32 xenon replacement for the 872 that I use in a desk killowatt. No fireworks. Greg -----Original Message----- From: owner-boatanchors@theporch.com = [mailto:owner-boatanchors@theporch.com] On Behalf Of J.D. MacAulay, WQ8U Sent: Wednesday, April 21, 2010 2:49 PM To: Old Tube Radios Subject: Re: 872 The Johnson Viking Desk Kilowatt; Collins 202B, 250A, and =A0KW-1 73MacWQ8UHillsborough, NC From: Paul Kraemer Subject: 872 To: "Old Tube Radios" Date: Wednesday, April 21, 2010, 5:15 PM Does anyone still use these large mv rectifier tubes? Paul K0UYA =20 ------------------------------ Message-ID: <33469B2D2B3D4D0982AFC216EC494F3D@wilsonspc> From: "Wilson Lamb" To: Old Tube Radios Cc: , Subject: A Real Boat anchor Date: Sat, 24 Apr 2010 12:39:56 -0400 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_NextPart_000_0050_01CAE3AB.3EE02470" This is a multi-part message in MIME format. ------=_NextPart_000_0050_01CAE3AB.3EE02470 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_0050_01CAE3AB.3EE02470-- ------------------------------ Message-ID: From: "RICHARD GEORGE" To: Old Tube Radios Subject: WTB Heathkit twoer or Date: Sat, 24 Apr 2010 11:48:26 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I have need for a Heathkit Twoer, sixer, or Tener case and front panel. Either one, model not important. Will buy complete radio but case and front panel need to be in good shape, no extra holes. Case and front panel Paint is not important. This is for a special project. Please contact me off list. Thanks K6KWQ Dick Amps by "MORE POWER" ------------------------------ Mime-Version: 1.0 From: "k4pf@juno.com" Date: Sat, 24 Apr 2010 21:11:51 GMT To: Old Tube Radios Subject: RE: 872 Message-Id: <20100424.171151.22389.0@webmail05.vgs.untd.com> Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Content-Type: text/plain; charset=ISO-8859-1 >Paul Kraemer K0UYA wrote Does anyone still use these large mv rectifier tubes? Hi, Probably no-one uses the original 872 tubes. The 872A was used in the Collins KW-1 and Johnson Desk KW, but it should not be replaced by a no-suffix 872. The 872A heater requires 5V at 7.5 Amps, the original 872 was 5V at 10 amps. The 872A also has a higher peak reverse voltage rating: 10KV instead of 7500V for the 872. 73, Ed Knobloch = ------------------------------ Message-ID: <7AE36525DEA84C5C9FC7E3589FC6A041@wilsonspc> From: "Wilson Lamb" To: Old Tube Radios Cc: , Subject: Re: A Real Boat anchor Date: Sun, 25 Apr 2010 08:35:10 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit OK, trying again. It's an RCA 701-A UHF sig gen, 370-560 MHz. HEAVY, but simple. I have not tested it, but it only has a PS and one or two tubes, so can't be too hard to get going. Here's a link to a picture. I'll email direct if needed.. http://picasaweb.google.com/wlinfometric/HAM#5463743868140961010 WL ------------------------------ End of BOATANCHORS Digest 4329 ******************************