Re: [Drakelist] VFO for 2NT
I have an Arduino based DDS VFO with a buffer amplifier that drives my Heathkit DX-20. It makes the DX-20 frequency agile. So great! HI HI Cost like $25 in parts. 73 - Bill KA8VIT > On December 4, 2019 at 11:42 AM Greg N9NWO wrote: > > I have seen the Hallicrafters HA-5. Wondering if there were a modern VFO for > crystal transmitters. > > I currently have a TR-7 and TR-4. Just bought a 2C/2NT and have a Heathkit > HW-16 with VFO. > > N9NWO___ ==== Bill Chaikin, KA8VIT USS COD Amateur Radio Club - W8COD WW2 Submarine USS COD SS-224 (NECO) ka8...@ka8vit.com http://ka8vit.com http://www.usscod.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] FS: Drake TR7A
We are downsizing and I have posted my Drake TR7A and accessories on QTH.com It can be located at https://swap.qth.com/ as Item # 1414691. The equipment is in very good cosmetic shape and functions well. -- 73, William (Bill) Rogers / W3UL Annapolis, Maryland U.S.A. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake manuals
Hello all...I found a few manuals in my collection...T4, R4 and MN2000...all original and in good condition I figure 10 for each??? 73 Bill Wa2jhs ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake L4B Amp
Anyone interested in a L4B amp? Message me for details if you are. Price is $1100.00 Possible meet for pick-up,depends on your location. KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake MS4 SPEAKERS
I have for sale 2(two) MS4 speakers. Both of them Have been professionally refurbished and restored. They are near collector quality. Price is firm at ninety dollars each and buyer to pay shipping by the carrier of your choice. Pictures on request. Bill Watson KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake Gear
For Sale, Drake TR4CWrit. SN 44110 Has been checked and serviced in April 2014. SSB filters swept,have results. Pictures on request. $600.00 Buyer pays shipping no noise blanker. email for more info, Bill, KC4WNI, Kentucky ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake FA-7 (fan)
Hello, I am looking for the FA-7 for my TR-7. I plan on using it for the PS-7. Help in finding one will be appreciated. Maybe you know a replacement fan that would work? If you do, any part number or company name will help in the search. 73, Bill, KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake CW 75
Hello To All, I am looking for the CW 75 keyer component to match the Drake 7 line. Looking for one in very good shape. 73, Bill, KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake Hand-held Microphone
Anyone know of a hand-held mic to use with a TR7? Such as a model number,brand name. Just want to try a hand-held. I'll take some suggestions on what works and what doesn't. 73, KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake WH7 Wattmeter
Hello To All, Can anyone tell me how difficult it is to find the Drake WH7 wattmeter and any idea what the going price would be? Seems not many are available. Any feedback appreciated. 73, Bill, KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake TR7
Hello, I am looking for the AUX-7 board for the Drake TR7 and also interested in the DR-7 also. Any help much appreciated. 73,Bill, KC4WNI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 41, Issue 2
Philip, Sounds like a very nice unit. I have a Drake TR4CW that I enjoy very much. At the presentI am searching for a TR7 or the 7A. Seems hard to locate and they seem to be very expensive. 73, Bill, KC4WNI On Wed, Feb 11, 2015 at 9:00 AM, drakelist-requ...@zerobeat.net wrote: Send Drakelist mailing list submissions to drakelist@zerobeat.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to drakelist-requ...@zerobeat.net You can reach the person managing the list at drakelist-ow...@zerobeat.net When replying, please edit your Subject line so it is more specific than Re: Contents of Drakelist digest... Today's Topics: 1. Re: Drake TR-4C rig for sale. (w4...@aol.com) -- Message: 1 Date: Tue, 10 Feb 2015 14:16:31 -0500 From: w4...@aol.com To: psgro...@sbcglobal.net, drakelist@zerobeat.net Subject: Re: [Drakelist] Drake TR-4C rig for sale. Message-ID: 8d2137d3681a5aa-1134-3e...@webmail-vd016.sysops.aol.com Content-Type: text/plain; charset=utf-8 Solid state rigs, especially those from Asia is difficult if not impossible to fix when it breaks. You will nearly always be able to find parts for tube rigs. Keep the TR-4C as a spare if nothing else. 73, John, W4AWM -Original Message- From: Philip Grocki psgro...@sbcglobal.net To: drakelist drakelist@zerobeat.net Sent: Tue, Feb 10, 2015 1:32 pm Subject: [Drakelist] Drake TR-4C rig for sale. Members: In order for me to enter the solid-state ham radio world I need to sell some of my coveted Drake equipment to folk who appreciates vintage Drake quality and its history. For sale is a Drake TR-4C transceiver, serial #36799 (with full set of 10-meter crystals), accompanying AC-4 power supply, MS-4 speaker, and Drake 729SR microphone. No noise blanker installed. I purchase all three units in 2008 from Ron Baker (WB4HFN). Ron fully re-furbished the TR-4C and re-painted its case. All units are currently in ?excellent? condition (cosmetically and functioning), and were always dust covered and pampered in my non-smoker household. Far less than normal usage of the rig has been made since its purchase. 95% listening, 5% short duration transmitting. No tinkering, alterations nor tube replacements have been made by me. Asking price for all three units is: $500 Shipping charges extra. Must be shipped in two separate packages. Carrier of your choice. Thank you. Philip Grocki (K8ZOO) This email is free from viruses and malware because avast! Antivirus protection is active. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- next part -- An HTML attachment was scrubbed... URL: http://mailman.zerobeat.net/pipermail/drakelist/attachments/20150210/990c7d14/attachment-0001.html -- Subject: Digest Footer ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- End of Drakelist Digest, Vol 41, Issue 2 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 41, Issue 2
Also I am looking for a really good web-site to brush up on my CW almost to the point of starting all over to re-learn in a more efficient manner. Any ideas? Thanks, Bill,KC4WNI On Wed, Feb 11, 2015 at 9:54 AM, Bill Watson thermbob...@gmail.com wrote: Philip, Sounds like a very nice unit. I have a Drake TR4CW that I enjoy very much. At the presentI am searching for a TR7 or the 7A. Seems hard to locate and they seem to be very expensive. 73, Bill, KC4WNI On Wed, Feb 11, 2015 at 9:00 AM, drakelist-requ...@zerobeat.net wrote: Send Drakelist mailing list submissions to drakelist@zerobeat.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to drakelist-requ...@zerobeat.net You can reach the person managing the list at drakelist-ow...@zerobeat.net When replying, please edit your Subject line so it is more specific than Re: Contents of Drakelist digest... Today's Topics: 1. Re: Drake TR-4C rig for sale. (w4...@aol.com) -- Message: 1 Date: Tue, 10 Feb 2015 14:16:31 -0500 From: w4...@aol.com To: psgro...@sbcglobal.net, drakelist@zerobeat.net Subject: Re: [Drakelist] Drake TR-4C rig for sale. Message-ID: 8d2137d3681a5aa-1134-3e...@webmail-vd016.sysops.aol.com Content-Type: text/plain; charset=utf-8 Solid state rigs, especially those from Asia is difficult if not impossible to fix when it breaks. You will nearly always be able to find parts for tube rigs. Keep the TR-4C as a spare if nothing else. 73, John, W4AWM -Original Message- From: Philip Grocki psgro...@sbcglobal.net To: drakelist drakelist@zerobeat.net Sent: Tue, Feb 10, 2015 1:32 pm Subject: [Drakelist] Drake TR-4C rig for sale. Members: In order for me to enter the solid-state ham radio world I need to sell some of my coveted Drake equipment to folk who appreciates vintage Drake quality and its history. For sale is a Drake TR-4C transceiver, serial #36799 (with full set of 10-meter crystals), accompanying AC-4 power supply, MS-4 speaker, and Drake 729SR microphone. No noise blanker installed. I purchase all three units in 2008 from Ron Baker (WB4HFN). Ron fully re-furbished the TR-4C and re-painted its case. All units are currently in ?excellent? condition (cosmetically and functioning), and were always dust covered and pampered in my non-smoker household. Far less than normal usage of the rig has been made since its purchase. 95% listening, 5% short duration transmitting. No tinkering, alterations nor tube replacements have been made by me. Asking price for all three units is: $500 Shipping charges extra. Must be shipped in two separate packages. Carrier of your choice. Thank you. Philip Grocki (K8ZOO) This email is free from viruses and malware because avast! Antivirus protection is active. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- next part -- An HTML attachment was scrubbed... URL: http://mailman.zerobeat.net/pipermail/drakelist/attachments/20150210/990c7d14/attachment-0001.html -- Subject: Digest Footer ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- End of Drakelist Digest, Vol 41, Issue 2 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R-4B Crystals For SAle
I have the following crystals for the R-4B for sale: 34.6 37.6 38.1 17.6 14.1 38.6 $10.00 each Please respond off list if interested. 73's Bill Ellis, WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Distortion of T-4XB SSB
Went to check into a SSB net yesterday and I was told my audio was distorted. What could be the problem. I've never used SSB before Thanks and 73's . Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] PL-259 and SO-239 Connectors
As we all know, as our equipment ages, these connectors tend to turn black or discolored. Do we ignore this, do you somehow clean them, or do we replace them? Thanks, Bill Ellis,WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] WTB: 18.1mHz Crystal (7.0-7.5mHz) R4-C
Hello, I am seeking to buy a 18.1mHz crystal (7.0-7.5mHz) for the R4-C. If you have one, please drop me a line with price plus shipping to 40356. Thanks es 73 Bill N4LG -- Bill Cotter, N4LG E-mail: n...@qx.net 173 Carolyn Lane Home: (859) 887-5563 Nicholasville, KY 40356-9340 Work: (859) 323-6474 ARRL ARCI #9878 QRPl #1646 QCWA #29393 FISTS #4535 -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR-4 AM Mode Receive Distortion...
Hi again, The small schematics and all the switching sure does makes circuit tracing a challenge... I was also thinking along the same diagnostic lines, but hoping for a I had the same problem and C110 was leaky thing. ;) Already been through the switches, tube pins, variable caps, alignment, etc as normal routine. My gut says it's a cap. I will investigate further when I have a chance. It's a nice rig and bench time is always good time. Thanks for your interest and 73! Bill V. -Original Message- From: Richard Knoppow Sent: Saturday, October 19, 2013 7:44 PM To: Bill V ; drakelist@zerobeat.net Subject: Re: [Drakelist] TR-4 AM Mode Receive Distortion... - Original Message - From: Bill V wviga...@cox.net To: Richard Knoppow 1oldle...@ix.netcom.com; drakelist@zerobeat.net Sent: Saturday, October 19, 2013 11:22 AM Subject: Re: [Drakelist] TR-4 AM Mode Receive Distortion... Hi Richard, Your facts are undistorted... and I do have a scope. Thanks and 73! Bill V. I have not had to deal with this problem in my TR-4 but the fact that it affects only AM is a good clue for isolating it. It eliminates the AF amplifier and leaves pretty much the detector circuit. The detector is also the first audio stage so the tube is suspect. I find it difficult to trace circuits in Drake schematics (and others too). I find it helpful to have a couple of large scale prints made of the schematics and trace out the circuits of interest with colored pencil or highlighters. That way you can see what is going on at the switches. Drake mostly used good quality plastic film caps so they are not so often the cause of trouble but even plastic and ceramic caps can go bad. I would also do the usual voodoo for older equipment, namely to work all the screws that may carry ground and very thoroughly clean the switch contacts. Its surprising how much trouble these two things can cure. Also clean the tube pins and sockets. May not help with this but poor contact at tube pins is responsible for a lot of mysterious problems. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR-4 AM Mode Receive Distortion...
Hi Richard, Your facts are undistorted... and I do have a scope. Thanks and 73! Bill V. -Original Message- From: Richard Knoppow Sent: Saturday, October 19, 2013 7:58 AM To: Bill V ; drakelist@zerobeat.net Subject: Re: [Drakelist] TR-4 AM Mode Receive Distortion... - Original Message - From: Bill V wviga...@cox.net To: drakelist@zerobeat.net Sent: Friday, October 18, 2013 8:52 PM Subject: [Drakelist] TR-4 AM Mode Receive Distortion... Hi all! I have an early (16k ser. #) TR-4. I’ve done all the usual maintenance and it works great in SSB mode. The issue is distorted AM Mode Only Receive audio. It’s the same on either filter and not effected by signal strength. The AC-4 voltages are free of ac. There’s no hum and V2 (12AV6) is good (swap made no difference). Any thoughts? Thanks and 73! Bill V. Just to clarify (no pun intended) you are getting distortion on received AM signals but not on SSB? Have you access to an oscilloscope? -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] TR-4 AM Mode Receive Distortion...
Hi all! I have an early (16k ser. #) TR-4. I’ve done all the usual maintenance and it works great in SSB mode. The issue is distorted AM Mode Only Receive audio. It’s the same on either filter and not effected by signal strength. The AC-4 voltages are free of ac. There’s no hum and V2 (12AV6) is good (swap made no difference). Any thoughts? Thanks and 73! Bill V.___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 62, Issue 11
Has your email account been hacked? This is totally off subject and inappropriate. -Original Message- From: drakelist-request drakelist-requ...@zerobeat.net To: drakelist drakelist@zerobeat.net Sent: Sun, Aug 25, 2013 11:00 am Subject: Drakelist Digest, Vol 62, Issue 11 Send Drakelist mailing list submissions to drakelist@zerobeat.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to drakelist-requ...@zerobeat.net You can reach the person managing the list at drakelist-ow...@zerobeat.net When replying, please edit your Subject line so it is more specific than Re: Contents of Drakelist digest... Today's Topics: 1. (no subject) (john.rocc...@comcast.net) -- Message: 1 Date: Sun, 25 Aug 2013 11:29:19 + (UTC) From: john.rocc...@comcast.net To: abkle...@gmail.com, heath...@mailman.qth.net, nick.rocc...@comcast.net, drakelist@zerobeat.net, boatanch...@theporch.com, psh...@btm-inc.com, liveliv...@comcast.net, john.rocc...@comcast.net, patriciash...@pstarget.com Subject: [Drakelist] (no subject) Message-ID: 1408916625.11079498.1377430159235.javamail.r...@comcast.net Content-Type: text/plain; charset=utf-8 referral program http://turkuaz-gmbh.com/749211.php From: john.roccaro 8/25/2013 5:29:12 AM -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist End of Drakelist Digest, Vol 62, Issue 11 * ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] T-4XB on 10 meters
Hi all, The other day I tried to operate my T-4XB on 10 meters, and nothing, no spot sigbnal no drive to load up on 10. Other bands are ok, just not 10. Any ideas what might be wrong? Thanks,. Bill Ellis, WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] AC-4 Power Supply
Got it... Thanks, Bill, WB9CAC From: Bill Ellis wb9...@yahoo.com To: Drakelist (Post) drakelist@zerobeat.net Sent: Saturday, May 25, 2013 8:01 PM Subject: [Drakelist] AC-4 Power Supply Does anyone have a voltage chart for the AC-4 by pin on the power supply female connector? Thanks, Bill Ellis, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] AC-4 Power Supply
Does anyone have a voltage chart for the AC-4 by pin on the power supply female connector? Thanks, Bill Ellis, WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R4B Headsets
Thanks all for input. I was able to find a pair. Bill, WB9CAC From: Bill Ellis wb9...@yahoo.com To: Drakelist (Post) drakelist@zerobeat.net Sent: Friday, May 10, 2013 7:01 PM Subject: [Drakelist] R4B Headsets Any recommendations for headsets for an R4B. My old military pair have fallen apart, so to speak. Bill Ellis, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4B Headsets
Any recommendations for headsets for an R4B. My old military pair have fallen apart, so to speak. Bill Ellis, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] T-4XB R4B PSK31
Does have any info on working PSK 31 and the B-line twins? Thanks, Bill Ellis, WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake 2-C Question
Hello Ken, The 2-NB noise blanker, for the 2-C receiver, originally sold for around $27.00 and was a plug in option. If you Google Drake 2-NB you should get a link to Universal Radio site with a picture and description of the 2-NB. There were not to many manufactured, so they are quite rare. 73, Bill wd8dfp From: Ken Miller K6CTW k6...@earthlink.net To: Drake List drakelist@zerobeat.net Sent: Sunday, April 14, 2013 7:47 PM Subject: [Drakelist] Drake 2-C Question All, I have been reviewing the manual on the Drake 2-C and found that there was a noise blanker accessory made for it. Can anyone provide details beyond what is in the manual? Also, has anyone ever seen one and maybe even have photos? Also, does it work? Thanks as it is something I've been wondering about for a while. 73 - Ken, K6CTW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake 2-C noise blanker
Hello, Looks like my cut and paste didn't work. So, I'll type the sheet We would advise that there are several factors which should be taken into consideration in connection with Noise Blanker operation. First of all, it is normal for a blank noise pulse to turn off the receiver for the duration of the pulse. This makes a hole in the received envelope. If the noise has a definite frequency rate, the signal will appear to be modulated at the noise frequency. The noise blanker is the most effective on noise pulses of very short duration with a relatively long time between pauses. A prime example of this type noise is that which is generated by automobile ignition systems. It is least effective with noise pulses of relatively long duration with short spacing in between pulses: an example of this is atmospheric noise. There are occasional conditions when an adjacent signal which you cannot hear in the R-4A output, will operate the noise gate and produce distortion. The reason for this is that the bandwidth of the noise blanker IF following the passband tuner is considerably wider than the passband filter itself. This broadness is a prime requirement for noise blanker operation. It should be kept in mind that the noise blanker is not needed and therefore should not be used, if the noise which you hear is equal to or less than the strength of the received signal. However, if the noise exceeds the strength of the received signal, the noise blanker will be a definite advantage and should be switched on. If after the above suggestions, you feel that your noise blanker is operating improperly, write in more detail concerning your observations and we will try to of additional assistance. R L DRAKE COMPANY Service Department 67/3 From: Bill Frost wd8...@yahoo.com To: Drake List drakelist@zerobeat.net Sent: Monday, April 15, 2013 7:12 PM Subject: Re: [Drakelist] Drake 2-C noise blanker Hello to the Group, While looking up information on the 2-NB for Ken, I found this sheet on noise blanker operation. This was written for the R-4A noise blanker, but someone wrote 2-NB on the sheet, so ... This was written back in March of 1967, most likely by an engineer for the service department, but not for me, as I was on the R-4A production line as a tester. 73, Bill From: Eric Webner k4fan.hamra...@gmail.com To: Charles Ring w...@roadrunner.com Cc: Drake List drakelist@zerobeat.net Sent: Monday, April 15, 2013 3:10 PM Subject: Re: [Drakelist] Drake 2-C noise blanker Charles, A large part of it depends on whether your 2-C suffers from the type of noise (pulse type) that the noise blanker can help with. I have bad power line noise at my QTH that a blanker won't touch. 73, Eric Webner K4FAN The DStar FAN Club On Apr 15, 2013 3:04 PM, Charles Ring w...@roadrunner.com wrote: Is a schematic and parts list available for the 2NB? Any possibility of duplicating it? How well does it work, in other words would it be worth the effort? . 73 de W3NU On 4/15/2013 0942, Ronald Baker wrote: I have pictures of the 2C and all the accessories on my Drake Website. Here is the link to that page: http://www.wb4hfn.com/DRAKE/DrakeEquipmentPictures/Equip_2C.htm Maybe once a year you may see the 2NB noise blanker listed on eBay, but they are very rare. The one’s I have seen sold on ebay range from $100 to $140. 73, Ron / WB4HFN Sent from my old computer that I purchased new before the Dead Sea got sick. From:drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of Bill Frost Sent: Monday, April 15, 2013 7:42 AM To: Drake List Subject: Re: [Drakelist] Drake 2-C Question Hello Ken, The 2-NB noise blanker, for the 2-C receiver, originally sold for around $27.00 and was a plug in option. If you Google Drake 2-NB you should get a link to Universal Radio site with a picture and description of the 2-NB. There were not to many manufactured, so they are quite rare. 73, Bill wd8dfp ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Metal shop
Hello to the groups, Should anyone need the work of a metal/machine shop, Please check out the following link. http://dynamicmetalshop.com/ These are a few fellows that worked at Drake for many years and bought the equipment from the metal/machine shop and started a shop in Middletown. The 4-line panels, cabinets, chassis, 7-line panels, cabinets, chassis, and all the bits and pieces in between were made with some of these machines. Tnx 73, Bill wd8dfp___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] C-4 for sale
Hello Drake People, I have a C-4 for sale. Recently I obtained a Drake line from the Toronto club station of a Fortune 500 company. It included the C-4 I have for sale. This item is complete. The remote switch has never been out doors. The whole station was lightly used and is like brand new. The C-4 was probably never used for anything except to turn the station on and off, and perhaps meter RF power or SWR. I will consider realistic offers. Thanks for allowing me to post this. 73, Bill VE3AUI, sxc...@gmail.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Twinning with TR
Anyone have any experience twinning a TR3 with one of the R4 line receivers? Can it be done? Thanks! Bill, VE3 AUI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] T 4 XC Help?
Can someone help me? I am attempting to to repair a T4XC which has been owner repaired before, but which has been working properly on all bands. I can not find a couple of things I see on the schematic. And I see something else I can not account for. I would like someone to tell me what component(s) are supposed to be connected to the following band switch lugs: 1. On the band switch wafer between the right angle drive and the chassis partition rearward of the right angle drive, with the transmitter inverted, looking into the rig from above, the solder lug closest to the observer, and nearest the bolt holding the switch wafer to the chassis partition--- what is supposed to be connected to this lug, and where does the other end of this component go? 2. On the same band switch wafer, rotating inward about 90 degrees from the above lug, there are no solder lugs. The first lug you come to after this space--- what component(s) are supposed to connect here, and where do they go in the transmitter? Believe me, I am not as crazy as this sounds! Thanks to one and all, 73, Bill VE3AUI ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 54, Issue 10 TR 3
The comment about the sideband filter in the TR 3 is not to be passed over lightly. If you have a problem there, you are in deep trouble. I carefully took the surrounding shield off my problem filter and repaired it, then put it together again. I was lucky I didn't break something. All the other comments, concerning historic equipment, TR 3 as a poor CW rig, etc, are spot on. Buy it anyway! These things keep us from going brain dead using multi-band CB equipment. 73, Bill, VE3AUI On 2012-12-12 3:28 AM, drakelist-requ...@zerobeat.net wrote: Send Drakelist mailing list submissions to drakelist@zerobeat.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to drakelist-requ...@zerobeat.net You can reach the person managing the list at drakelist-ow...@zerobeat.net When replying, please edit your Subject line so it is more specific than Re: Contents of Drakelist digest... Today's Topics: 1. Re: TR-3 (Al Parker) 2. Re: TR-3 (Lee Hiers) 3. Re: TR-3 (John King) 4. Re: TR-3 (David Assaf III) -- Message: 1 Date: Tue, 11 Dec 2012 14:17:35 -0500 From: Al Parker anc...@ec.rr.com To: lane denune lanerda...@yahoo.com Cc: drakelist@zerobeat.net drakelist@zerobeat.net Subject: Re: [Drakelist] TR-3 Message-ID: 50c786cf.60...@ec.rr.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi, The deal killer in the TR-3 is the SB filter. They often go bad on one sideband, still get some thru, but way low. Check output on 20m and on 15m, they should be close, and above 125 watts out. Actual value could be more (hopefully), but will depend upon alignment. Normally 15m output will be a little less than on 20m, but not more than say 20 watts less, if the final tubes are reasonably good. You should be able to load up to about the same plate current on both bands. Other than that possible problem, the TR-3 can be a good rig for SSB operation, usually at a good price, also. S-meter often seems stingy, just turn up the AF gain if needed, signals are there. Definitely check out the p.s. and replace the bias filter cap at least. 73, Al, W8UT www.boatanchors.org www.hammarlund.info There is nothing -- absolutely nothing -- half so much worth doing as simply messing about in boats Ratty, to Mole On 12/11/2012 12:09 AM, lane denune wrote: Hi Guys ; Considering a fully functional TR-3 from the owner of 15yrs. I've been invited to try it on the air at his shack before I take it. Being a relative newbie to Drake equipment, is there any particular areas to consider with the TR3 other than the obvious and general operating condition? I don't recall anything negative in particular about this vintage radio. I will upgrade the power supply and finals..Anything come to mind? Thanks 73 de n8aft. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- Message: 2 Date: Tue, 11 Dec 2012 15:12:38 -0500 From: Lee Hiers lee.hi...@gmail.com To: drakelist@zerobeat.net Subject: Re: [Drakelist] TR-3 Message-ID: CAEEr= 7nzbfs+eqfb4pgsgngmzow8jodkwph5dhyxcvfk8hx...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 On Tue, Dec 11, 2012 at 12:00 PM, lanerda...@yahoo.comdrakelist-requ...@zerobeat.net wrote: Being a relative newbie to Drake equipment, is there any particular areas to consider with the TR3 other than the obvious and general operating condition? ?I don't recall anything negative in particular about this vintage radio. For one, it's a terrible CW radio...if that matters to you. 73 de Lee -- Lee Hiers, AA4GA www.aa4ga.com Submit your totals to the unofficial QRP DXCC standings - go to * http://www.aa4ga.com/p/qrp-dxcc.html* for more info! -- next part -- An HTML attachment was scrubbed... URL: http://mailman.zerobeat.net/pipermail/drakelist/attachments/20121211/5c1b2219/attachment-0001.html -- Message: 3 Date: Tue, 11 Dec 2012 15:43:52 -0800 (PST) From: John King k5...@yahoo.com To: Lee Hiers lee.hi...@gmail.com,drakelist@zerobeat.net drakelist@zerobeat.net Subject: Re: [Drakelist] TR-3 Message-ID: 1355269432.77968.yahoomail...@web121303.mail.ne1.yahoo.com Content-Type: text/plain; charset=iso-8859-1 Should you buy a TR3? I think the answer should be given after determining what he plans to do with it. One reason to purchase a Drake TR3 is the historic value to the hobby.I have been licensed for almost 54 years and have grown with the hobby from 6AG7/807 tube transmitter and Hallicrafters S40A receiver. They were
[Drakelist] Magnetic Loop Antenna wth a T-4XB
Have been reading quite a bit lately about magnetic loop antennae. Does anyone have any experience using them with a T-4XB? Please respond directly, unless you think it would be a good topic for the list. Thanks, BILL ELLIS,. WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C 160 Meters Sensitivity
Hi Group Has anyone found a way to improve the sensitivity on the 160 Meter Band?? It seems less lively compared to the other bands even after alignment. Thanks in advance Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C Interesting Find
My R4C seemed a bit poor in the sensitivity department so I had an idea to improve it. I aligned the R4C pretty well but it didn't seem very lively. So with the bottom chassis visible I took my screw driver and loosened/ tightend each screw twice on each side of the 4 rows of trimmer bracket ground. Wow.what a difference in sensitivity mainly 160-20M and in between. I estimate a 8-10 dB of more gain. I learned this method of re-establishing grounds from a metallurgist(sp)ham neighbor who showed me what happens to two surfaces create a fine film a lose bonding with time. If the two metals are much different the faster the degradation. Your mileage may vary. I recommend all accessible screws and nuts...it can cure some pretty obscure problems and takes less than 15 minutes. I had to recalibrate the S-meter because of the gain change. It should work on R4any receiveror any old boatanchor. Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C SSB Leakage
Hi Group I have written previously about my R4C having signal leakage in the SSB mode only affecting the PBT control and S-meter levels. Someone suggested that the 4NB was causing the leakage so I removed the 4NB and put some wire jumpers as I didn't have a 4NB plug, no change. However I ordered a aftermarket socket plug to do a sanity check..guess what..it got worse!!! Instead of a S5 level leakage it then went to S9 with the shorting plug??!! I guess I've narrowed it down to something on or near the NB4 jack underneath. So much for the sanity check..bizarre. Best 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] is Drake closing?
Hello, Drake hasn't been Drake as you guys knew Drake for a long time. The company was mainly producing video and cable head end products, see their web-site. Amateur radio manufacturing and or service was history, long gone, even with the production of the R-8 series receivers, SW-8 etc. The company was sold, sold again, and recently sold again to Blonder-Tongue another video and cable product manufacture, This company was Drakes largest competitor and is located in New Jersey, see their web-site. Most of the Drake employees were slowly let go, from the top down, all except for a few from sales, engineering and one guy from service. These people will move to Springboro Pike, there will be NO manufacturing at this building, save for what engineering builds, manufacturing will be done in New Jersey or . The Drake name will be used on some products built by Blonder-Tongue as the name Drake is well known in the video and cable head-end market. This is ONLY what I have heard !!! 73, Bill From: John Hudson john.hud...@calema.ca.gov To: Charles Ring w...@roadrunner.com; Robert Ladden rmlad...@yahoo.com Cc: drakelist@zerobeat.net drakelist@zerobeat.net Sent: Monday, August 20, 2012 9:04 PM Subject: Re: [Drakelist] is Drake closing? I'm sorry but who said that? Who said Drake was moving manufacturing offshore? Nothing in the previous messages said they were moving offshore or lost their moral compass. I believe previous messages indicated this IS a local move and KEEPING the existing numbers. de WA6HYQ From: drakelist-boun...@zerobeat.net on behalf of Charles Ring Sent: Monday, August 20, 2012 5:55:45 PM To: Robert Ladden Cc: drakelist@zerobeat.net Subject: Re: [Drakelist] is Drake closing? Off to slave labor in China most likely. The businesses that had a conscience have all lost it or been killed off. On 8/20/2012 2041, Robert Ladden wrote: With leaving the manufacturing equipment behind, perhaps they are off-shoring their manufacturing. Sad if true. 73, Bob WW3QB From: ve...@cogeco.ca ve...@cogeco.ca To: drakelist@zerobeat.net Sent: Monday, August 20, 2012 8:27 PM Subject: Re: [Drakelist] is Drake closing? The Drake web site gives a new address in Miamisburg. When you Google the address, a 7500 sq.ft. office building comes up. Is there more to this than just moving?? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C Speaker Output
Hi Group On the R4C speaker output which is 3.2 ohms. Can this audio be attached to a computer's microphone jack (typically 50K) using a resistor pad to prevent overload?? 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] T-4XB power switch
Hello Tom, Yes, The TR-5 AF gain/on-off switch was the same as used in the TR-7. I just double checked with John Kriner, who still repairs both units at home. 73, Bill From: Tom Holmes thol...@woh.rr.com To: 'Charles Ring' w...@roadrunner.com; 'Bill Frost' wd8...@yahoo.com Cc: drakelist@zerobeat.net Sent: Wednesday, July 25, 2012 10:46 AM Subject: RE: [Drakelist] T-4XB power switch Does anyone know if the TR5 switch is common to the TR7 or other models? Mine has been bad for a long time and I have just jumpered it to get by. Tom Holmes, N8ZM Tipp City, OH EM79 From:drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of Charles Ring Sent: Wednesday, July 25, 2012 5:30 AM To: Bill Frost Cc: drakelist@zerobeat.net Subject: Re: [Drakelist] T-4XB power switch Thanks, I will probably leave it turned on and switch it externally. 73 de W3NU On 7/24/2012 0914, Bill Frost wrote: Hello Charles, I suspect the small spring inside the on/off switch cap got hung up after sitting idle for awhile. I would not recommend a lubricant since it is switching power. Drake stocked the on/off switch cap part of the gain control and also the on/off switch cap for the R-4B. We replaced several of these in the service department. John Kriner has the R-4B switch caps in his store on ebay, he thinks the switches are the same. But, I'm not so sure, I know they had different part numbers, but I never tried using one for the other, as we always had both parts. If interested in getting a spare switch cap, contact John Kriner, The Man Electronics. 73, Bill wd8dfp ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] T-4XB power switch
Hello Charles, I suspect the small spring inside the on/off switch cap got hung up after sitting idle for awhile. I would not recommend a lubricant since it is switching power. Drake stocked the on/off switch cap part of the gain control and also the on/off switch cap for the R-4B. We replaced several of these in the service department. John Kriner has the R-4B switch caps in his store on ebay, he thinks the switches are the same. But, I'm not so sure, I know they had different part numbers, but I never tried using one for the other, as we always had both parts. If interested in getting a spare switch cap, contact John Kriner, The Man Electronics. 73, Bill wd8dfp From: Charles Ring w...@roadrunner.com To: drakelist@zerobeat.net Sent: Monday, July 23, 2012 10:23 PM Subject: [Drakelist] T-4XB power switch Today I took my two T-4XB's off the shelf after way too long and found that both of them have trouble with the power switch ganged with the gain control. Nothing happened when i turned them on (yes I used a variac at low voltage and i will recap the AC-4). Checking with an ohmmeter later I found that both power switches were open, but repeatedly cycling them brought them back. Is there an established way to make them reliable? -- Charles Ring W3NU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Need R4C Xtals
I am stil looking to buy a few Stock R4C Xtals. Mine are way off frequency...they are: 7.0 Mhz (18.1 Mhz) 28.5 Mhz (39.6 Mhz) These are Stock R4 any Xtals so they aren't scarce. 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C Static
I have noticed that when using narrow CW Filter's in my R4C that I hear low-moderate static bursts,like storm static. I have substituted each and all the 6EJ7's with new tubes.no change. I removed each and all 6EJ7 tubes and power it on with no change in the static. I remove the 6BA6 RF tube no change. My R4C has a SS power supply, SS Audio Brd, SS Product Det. Sounds like a electrolytic or a resistor going bad. Any suggestions?? The RF Gain being reduced lowers this static level. 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake Repairs
Hello, I just spoke to John Kriner, at Drake, and he advised that ALL repair of Drake amateur and shortwave products has ceased. He has sent requests for changes to their web master, however the changes have not made it to the web site as yet. If you need repair service of a Drake product or a need a Drake part, contact John at home, jkri...@cinci.rr.com, he may be able to assist you or refer you to someone that can assist you. Tnx 73, Bill___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C BFO Leakage
A few weeks back I wrote about PBT levels in SSB/AM modes. It would change S-Meter levels depending on adjustment of the PBT. I ruled out the 4NB board by removing it..no change. However when I removed the bottom cover almost 6 S-Units of PB feedthrough were reduced and performance was enhanced with less white noise. Interesting to know the interference is being conducted by the metal bottom cover to key area's of the bottom chassis. Next I will attempt adding metal shields to isolate internal RF from conducting to nearby by circuits that are prone. Best 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C PBT Leakage
Hi Bob I think you hit it on the head. Also I'm suspect of the NB cable harness being draped above the 3rd mixer tube area. I only regret not having a low end Spectrum Analyzer to end this design anomaly and improve this situation. As suggested I need to disconnect the NB and short some NB socket pins as I don't have the NB shorting plug. I have many years RF experience in a factory setting doing just this for 200 watt VHF-UHF repeaters. It's not for the impatient and is a fascinating. The way my R4C is operating in AM, SSB and CW receive modes.each one has different S-Meter calibration from each other. Best 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C Questions
Hi Group I recently obtained a Sherwood upgraded R4C (SN 22xxx), the only Sherwood upgrade it doesn't have is the 2K Upper Lower SSB filters. It performs very well but it has one oddity. When in SSB mode and the PBT is adjusted Upper Lower end of travel it varies the S-Meter from S6 middle center PBT to S1 either PBT endpoint. On CW using the 1.5Khz, 500Hz or 250Hz it works like it should or what I'm accustom to. I've corrected many small problems by treating grounds and filter sockets, tube sockets from the topsidebottom side next. It just seems like I'm getting allot of white noise or bleed through from somewhere to cause the SSB mode oddity. Question? How can it tell if this has the T7C version xfrmer?? These Sherwood upgrades were done 20+ yrs ago and this nice condition R4C has sat unused for many years. Perhaps all is typical as I don't have another to compare to. Best 73 Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C Xtals
Hi Group I am looking to replace out of spec xtals in my Drake R4C receiver. One's listed are 4-9 Khz off frequency. The * xtals are for 160M 10M are more a priority. Contact me off list @ wmarv...@charter.net Wanted: 1.5 Mhz 12.6 Mhz* 3.0 Mhz 14.1 Mhz 9.5 Mhz 20.1 Mhz 10.0 Mhz 21.1 Mhz 11.5 Mhz 22.6 Mhz 28.0 Mhz 39.1 Mhz* 28.5 Mhz 39.6 Mhz* Best Bill KB9IV ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C Xtals
For the most part I have found the xtals...thanks Doug! Best 4th to All Bill KB9IV___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 6HS6 SOURCES?
http://www.radiotubesupply.com/ - Original Message - From:Sent: Sunday, April 29, 2012 6:18 PM Subject: Re: [Drakelist] 6HS6 SOURCES? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Blonder-Tongue Buys Drake
Hastings Equity, the principal owner of R.L. Drake, LLC, has sold its interest in R.L. Drake, LLC to Blonder-Tongue. http://finance.yahoo.com/news/Blonder-Tongue-Buys-R-L-Drake-bw-2268262321.html?x=0 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] t4x
Ok, got a good onemy t4x just started showing cathode current even when I don't have the key down on the mike or the cw key..its there all the time and I can hear a carrier on my r4 all the time...doesn't matter where the controls are set...seems the finals are in transmit all the time and the relay isn't pulling in, it only pulls in when I key the mike..I can even hear my voice in the r4 without the key down...h. 73 Bill Wa2jhs ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Can You Identify this?
Hello Marty, You have obtained one of the RF/IF click boxes that was used by Drake technicians to test and/or troubleshoot the Drake products. These were designed and built in house for use on several product lines. If you go to the Drake Museum of LA6OP and the late Jean-Marie Cherry you will find a description of this unit that I wrote for their web-site. http://www.dproducts.be/Drake_Museum/rf__if_test.htm We had several dealers with service departments and we produced the RF/IF test fixtures for each dealer that wanted to service Drake equipment on site. They sent their service technician down for a weeks training and they were given the test fixture upon completion of the training. Let me know if you have additional questions after reading the article on the click box. 73, Bill From: w7...@mtaonline.net w7...@mtaonline.net To: wd8...@yahoo.com Sent: Tuesday, January 17, 2012 10:36 PM Subject: Can You Identify this? Bill, I hope all is well with you. I recently bought this and would like to know how it was used. Before I bought it and it arrived here I thought it had a built in power supply (Maybe a clone of an AC-4) but apparently it was used with an external supply for the rig under test. I see that it does have built in supplies for the RF and IF signal generators. I also got three sheets of schematics with it in an envelope with Amateur Electronic Service of London. Ontario on it. I bought it from a Canadian ham with the last name of Shack. Was this used mainly for repair or for new rig calibration? I plan to share some pictures and what info you can give me with the Hams on the Drake List. The rigs listed on it are the T4-X, TR-4, TR-44, TR-6, TC-2 and TC-6. The schematics have a 1969 date on them with a Miamisburg address and drawn by a EDF Thanks! Marty KL7AM___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake AC-3/L-4 Adaptor Cable
I have a AC-3/L-4 adapter cable posted on QTH.com if anyone is interested. Either search for it usings the subject line or by my call, NM4K. Price is $25.00 Thanks, Bill ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Crystal has letter R
All the crystals that I've seen with R on them means they are to Receive on that frequency. The actual frequency of the crystal is offset ( usually lower ) by the IF of the receiver. Bill VK2ZCV - Original Message - From: Neil M Califano cchange...@yahoo.com To: Drakelist@zerobeat.net Sent: Wednesday, October 12, 2011 1:07 PM Subject: [Drakelist] Crystal has letter R The hc6u crystal I bought has a letter R on the top. Does that have something to do with resonance? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake Service
Hello to the group. John Kriner sent me an e-mail advising that the R. L. Drake Co. has discontinued repair service of the PRN-1000, the SW-1, the SW-2, and the SW-8 receivers. I didn't check, but I assume this information is also on their web-site. 73, Bill___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] FS: Unique Drake Service Supplement CDs
Anyone who has Drake's and doesn't have Garey's CD's are missing out. I am in no way a tech, but with his CD's and some guidance from Garey, I have been able to repair my Drakes on several occasions without the need to send them out. These are an excellent value and a must have for any Drake owner. On Thu, Aug 4, 2011 at 5:22 PM, Garey Barrell k4...@mindspring.com wrote: Here is the information that Drake left out of their manuals! Unique supplemental service information CDs available for the Drake TR-4, TR-4C/Cw/CwRIT, A, B and C Lines, 2-C / 2-NT and the 2-B receiver. High resolution color photos of the under chassis and individual PC boards of each unit, with all parts identified and keyed to a parts list make it easy to locate any component. No more trying to trace wires through bundles, etc. This information is not available elsewhere and really makes a difference in servicing these units. These CDs are NOT just scans of the original manuals that were included with the equipment when new. High resolution scans of the original manuals ARE on the CDs, along with scans of manuals for associated equipment such as the C-4, FS-4, MN2000, L-4B, W-4, etc. All of you who asked for the R-4A/T-4X and 2-C/2-NT, WHERE ARE YOU?? Samples of these pages (at reduced resolution) and purchase information are at www.k4oah.com. -- 73, Garey - K4OAH Glen Allen, VA __**_ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/**mailman/listinfo/drakelisthttp://mailman.zerobeat.net/mailman/listinfo/drakelist __**_ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/**mailman/listinfo/drakelisthttp://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] spare parts
Hello, I have available, an R-4C 1st IF 8kHz 5645 crystal filter. It's new, never used, $25.00 plus the shipping. Also new, never used, NB-7A crystal filter, UV-3 crystal filter set, and a 500 Hertz TR-4CW crystal filter..$20.00 each plus shipping. Tnx 73, Bill___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] spare part
Hello, I have a 500 hertz crystal filter, for the TR-4CW, if anyone needs it as a spare or ??? $30.00 plus shipping. Tnx 73, Bill___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] New L-4B Article Available
I personally think Ron did a great job on the article. For the builder or tech person this is a great project and as far as I am concerned I would rather have a table top amp using a 3-500Z than amps using the old sweep tubes 572's or 811's. This conversion is not for everyone, but Ron Baker is one of the top authorities on Drake, Heathkit and Collins equipment and he know his stuff. Personally I want to thank Ron for providing a fantastic website, very interesting articles and helpful upgrades to our Drake equipment. Also for the tech support if someone needs help. Keep up the good work Ron and don't let anyone stop you from your great work you to to preserve the old tube equipment and to keep us informed. Bill, nm4k On Mon, May 2, 2011 at 2:46 PM, Lee Hiers lee.hi...@gmail.com wrote: On Mon, May 2, 2011 at 1:54 PM, w4...@aol.com wrote: I was thinking of a similar response but I didn't want to be the one who started the fire. I tend to agree, I wouldn't want to do that to an L-4 either, but as 'HFN says The theme of this article presents *one* possibility in giving the old girl a new life. I can see folks wanting an all-in-one solution...and if they somehow end up with an L-4 RF deck, no problem. Definitely a YMMV topic! 73 de Lee -- Lee Hiers, AA4GA www.aa4ga.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Crystals for 30 - 17 -12 meters
Are most of you who have the B-line transceiving with the T-4XB or R-4B or are you getting separate xtals for each? Also, do you know of any good sources for crystals? Thanks 73's Bill, WB9CAC___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] t4x cw problem
Garey...I think it was you who said c132 was giving me a sidetone problem on my t4you were right...replaced it and no more errant sidetone 73 Bill sent via samsung android.. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Strange serial number
I am glad to learn about the T-4 reciter's serial numbers. Mine is 0018 and I had it converted to a T-4X when I sent the unit in for a repair. - Original Message - From: Kihwal Lee kih...@yahoo.com To: drakelist@zerobeat.net Sent: Tuesday, March 15, 2011 4:22 PM Subject: Re: [Drakelist] Strange serial number This is from Bill Frost about the special edition T-4X. Kihwal K9SUL - Original Message From: Bill Frost wd8...@yahoo.com To: Kihwal Lee kih...@yahoo.com Sent: Mon, March 14, 2011 11:57:02 AM Subject: Re: [Drakelist] Strange serial number Hello Kihwal, If memory serves, I believe your T-4X was originally built as a T-4 reciter. The T-4 was not a big seller, so somewhere around the end of the life of the T-4X, the T-4's that were in stock, where unpacked and converted into T-4X's by adding the VFO sub-assembly. The serial number stayed the same, as it was already stamped on the chassis, carton, etc. 73, Bill ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] New (to me) B Line...
Hi Don! Thanks for the offer, but I would hate to use a rare NOS piece on this unit. It's not what I would call mint condition... I just was looking for one that I can see through. ;) 73! Bill V. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] New (to me) B Line...
Hi All! My name is Bill and I'm a boat anchor-aholic. ;) My shack consists of mostly 60's era rigs that I have restored including National, Swan, Ameco, etc. I do have some modern stuff like an R8 that I bought new and a few older Yaesu and Kenwood rigs. I just picked up a pretty nice B-line from a local CraigsList ad. My original intent was to clean it up and pass it along, but now I don't want to part with it. It had a few minor issues like the usual dirty switches and pots, a shorted diode in the vox circuit that kept the relay pulled in, a couple of cold joints, etc... The receiver performance is outstanding. The transmitter is a little anemic in the audio department, but otherwise pretty good. One thing that I do need is a vfo dial plate for the T-4XB. I have seen yellowed dials before, but this thing is opaque brown/black! I hope to contribute to this reflector. 73! Bill V. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] FS: Unique Drake Service Supplement CDs
If you own Drakes and don't have one of Garey's CD's you are missing a lot. I have purchased these CD's for my B-Line and the TR4C. I am not a tech but with these CD's and Garey's help I have been able to repair my Drakes myself on more than one occasion. They are fantastic and show you the parts in HI-RES color that makes it easy to find. I strongly recommend these CD's. Bill, nm4k On Tue, Mar 29, 2011 at 6:31 PM, Garey Barrell k4...@mindspring.com wrote: Here is the information that Drake left out of their manuals! Unique supplemental service information CDs available for the Drake TR-4, TR-4C/Cw/CwRIT, A, B and C Lines, 2-C / 2-NT and the 2-B receiver. High resolution color photos of the under chassis and individual PC boards of each unit, with all parts identified and keyed to a parts list make it easy to locate any component. No more trying to trace wires through bundles, etc. This information is not available elsewhere and really makes a difference in servicing these units. These CDs are NOT just scans of the original manuals that were included with the equipment when new. High resolution scans of the original manuals ARE on the CDs, along with scans of manuals for associated equipment such as the C-4, FS-4, MN2000, L-4B, W-4, etc. Samples of these pages (at reduced resolution) and purchase information are at www.k4oah.com. -- 73, Garey - K4OAH Glen Allen, VA ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] 3 ring binders
Hello to the group, Before I list these elsewhere I have 7, 2 inch 3 ring binders, which have DRAKE Technical Manual on the front cover and DRAKE, in large letters, on the end of the binder. Dark blue in color and in like new condition. These were used in the TVRO days filled with schematics of the home satellite receivers and sent or sold to repair centers. I'm asking $15.00 each plus the shipping. I can send a pix upon request, please reply direct. Tnx 73, Bill ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Binders
Hello, The three ring binders have been sold. Thanks to the group !! Tnx 73, Bill ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] K4OAH CD's
I don't want to sound like a broken record, but if you don't own one of Garey's CD's for your Drakes your really missing the boat. I am not a tech, but do like to keep my Drakes running myself without the need to send them out to someone else. In the past two months my TR4C has had two problems both of which I fixed myself with Garey's advice and being able to refer to his CD giving detailed HI-RES pictures of the components of the Drakes. Everything is labeled and easy to find. I was able to identify the component I needed to check and make the necessary repairs. I owned the CD for my Drake twins, which I sold and one for my TR4C. I just wish he would produce one for my Collins KWM-2A. The older radios are upwards of 60 years old and things are going to go bad, its fun and very rewarding to be able to fix things yourself even if you are not a qualified tech. Bill, nm4k ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R. L. Drake Co., Lobby Display youtube link
Hello to the group, A few details about the Drake display. I started collecting the equipment when Bob Drake was still around. He had a large walk in closet behind his office, in Miamisburg, and I started putting stuff in there, we both had the thought of a museum somewhere in the future. When we moved to Franklin, I designed a museum into the Service Department lobby, in the rear entrance of the plant. That museum sat idle for several years, as we closed the rear entrance. A few years ago, I was given the assignment of moving the museum to the front lobby. The lower left corner displays the early products, filters, etc. John Chenowith gave me several assemblies produced, as he was the plant manager in the early years. The ham gear progress's up and to the right. The home satellite products and commercial satellite products are on the far right side. The items on the bottom or sitting on the floor are mainly plaques and awards received over the years. One of which is for having an excellent Service Department. There are also advertising items, collected over the years, T-shirts, ties, pens, etc. Unfortunately , I wasn't able to collect one of every product, but it is a nice collection, one I am proud to have been a part of. 73, Bill --- On Fri, 9/24/10, Joe Loverti ww8x@gmail.com wrote: From: Joe Loverti ww8x@gmail.com Subject: [Drakelist] R. L. Drake Co., Lobby Display youtube link To: drakelist@zerobeat.net Date: Friday, September 24, 2010, 11:15 PM Fellows: I visited R. L. Drake Co., today and took a video of the display they have in the lobby. I was nearly blown away when I first saw it – I thought many of you would like to see it if you haven't already. Bill Frost was largely responsible for the display and did an awesome job with it. Thanks to Bill Frost, Bob Drake and the R. L. Radio Co., for preserving an important era in the history of amateur radio and American manufacturing genius. The link is here: http://www.youtube.com/watch?v=-Py4BraHUFY 73, Joe WW8X -Inline Attachment Follows- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R. L. Drake Co., Lobby Display youtube link
Hello Curt, That is a Theta 7000e, there was also a Theta 9000, but I wasn't able to save one of those. The 7000e was returned for service and the cost of repair was excessive and the customer did not want it returned, so I put it in the pile, as I didn't have one for the museum. 73, Bill --- On Sat, 9/25/10, Curt Nixon cptc...@flash.net wrote: From: Curt Nixon cptc...@flash.net Subject: Re: [Drakelist] R. L. Drake Co., Lobby Display youtube link To: Joe Loverti ww8x@gmail.com Cc: drakelist@zerobeat.net Date: Saturday, September 25, 2010, 8:38 AM WOW...thanks Joe.. I need to make a point of stopping in there soon. Its not that far away. What is the console looking device with the controls on the top that is sitting on top of the R-7(A) ? in the upper right? Thanks Curt Joe Loverti wrote: Fellows: I visited R. L. Drake Co., today and took a video of the display they have in the lobby. I was nearly blown away when I first saw it – I thought many of you would like to see it if you haven't already. Bill Frost was largely responsible for the display and did an awesome job with it. Thanks to Bill Frost, Bob Drake and the R. L. Radio Co., for preserving an important era in the history of amateur radio and American manufacturing genius. The link is here: http://www.youtube.com/watch?v=-Py4BraHUFY 73, Joe WW8X ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] PSK31 B-Line Twins
Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake filter caps, etc.
Paul, The Hayseed Hamfest is back in production. They carry re-cap kits for the R-4 and 2-C at a reasonable cost. No affiliation, just a satisfied customer of several kits for the B and C Lines. http://www.hayseedhamfest.com/capkit.htm 73 de Bill, K9RZ - Original Message - From: ph...@aol.com To: drakelist@zerobeat.net Sent: Saturday, August 14, 2010 10:38 PM Subject: [Drakelist] Drake filter caps, etc. I know that Unique Radio Parts closed up shop a couple of years ago, but they used to sell filter cap boards + caps to replace the can caps in the R-4 series and 2B receivers. Does anyone have a mask or template of the actual board(s) that I could use to etch my own one-off PCBs to replace the cans in a 2B and an R-4? I understand that we're no doubt talking about two different PCBs for the two receivers. Also, does anyone know of a source of the blue light-filtering material for the R-4 series dials? TNX in advance. 73/arf, Paul, K4MSG -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] T-4XB Dial - White Diffuser Material
Sorry for the delayed response. I did not want to be rude and ignore all of the good suggestions. I have been busy this week trying to recover a microwave site that was toasted by lightning. I will try and find the quilting template material here locally. There are several craft stores in town, so one of them should have it. 73 de Bill ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] T-4XB Dial - White Diffuser Material
Greetings to the Group, I picked up a Drake T-4XB at a local hamfest that has a cracked white dial diffuser. I still have a couple of the blue filter replacement kits from WA9TGT, but those kits did not include the white diffuser. I see that KG9BV is now selling the blue filter replacement kits including the white diffuser, but email quires to his published address have gone unanswered. Does anyone have a suggestion on where to obtain some of the white plastic material that is suitable for this application? Thanks in advance. 73 de Bill, K9RZ ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] T-4XB Dial - White Diffuser Material
Try a product called Tinted Template Plastic EZ Quilting by Wrights P.O. Box 398 West Warren, MA 01092-0398 I have a sheet of this in Blue and White that make good replacements. I think you can find them at Hobby Stores or Craft Stores. Here is a link that you can try: http://www.simplicity.com/p-1470-no-melt-mylar-template-12-x-18.aspx Good Luck Bill, nm4k On Sun, Aug 8, 2010 at 7:05 PM, Gary Poland gpola...@cinci.rr.com wrote: Bill, I have longed searched for a suitable replacement for the white dial back ground plastic. The only material that I have been able to come up with that passed light well enough is plastic For Sale, Garage Sale, etc signs. You don't get a lot of white area without printing for each sign you buy but they are cheap. I have tried contacting the companies that make the signs in hope of buying blank sheets, but have never received an answer. 73, Gary ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] T-4XB Dial - White Diffuser Material
In my previous resonse regarding the white diffuser replacement I probably was not clear regarding the link I posted and the product made by EZ Quilting by Wrights. They make a mylar sheet that is 12 x 18 that is used for pattern making. This mylar sheet comes in various colors and is excellent for making both the blue filter and white diffuser replacements. One sheet can make several. I was shown this by a fellow ham who has refurbished several Drakes and replaced the filters and diffusers. I used it on a recent B-Line project and it works great. If you go to this link look at the white mylar pattern material for $3.99. http://www.simplicity.com/p-1470-no-melt-mylar-template-12-x-18.aspx Bill, nm4k On Sun, Aug 8, 2010 at 4:51 PM, Bill Jackson k...@radiks.net wrote: Greetings to the Group, I picked up a Drake T-4XB at a local hamfest that has a cracked white dial diffuser. I still have a couple of the blue filter replacement kits from WA9TGT, but those kits did not include the white diffuser. I see that KG9BV is now selling the blue filter replacement kits including the white diffuser, but email quires to his published address have gone unanswered. Does anyone have a suggestion on where to obtain some of the white plastic material that is suitable for this application? Thanks in advance. 73 de Bill, K9RZ ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R4-B Cap value?
Kirk, It is listed on K4OAH's service CD as an 8 uF, 150V. The replacment in the capacitor kit from Hayseed Hamfest is 10 uF 200V. This is the same capacitor that blew in my R-4B that prompted me to purchase the kit. 73 de Bill - Original Message - From: Kirk Smith To: drakelist@zerobeat.net Sent: Friday, July 16, 2010 1:01 AM Subject: [Drakelist] R4-B Cap value? Hi I'm looking for the value of C91 on my R4-B. The schematic is very unclear my cap has roasted!! The cap shows 15mf @150volts but the schematic looks more like an 8.can someone help? Thank you!!! Kirk -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R-4B Recap
Greetings, I am a relative newcomer to boatanchor restoration. So far, the Drakes I have purchased have only required some basic switch cleaning and detailing to bring them back to their original glory. I now have an R-4B that requires the installation of a recap kit from the Hayseed Hamfest. I am looking for some advice from the group on the techniques they have used to replace the 4 section can capacitor with the minimal amount of disturbance to the wiring in the radio. I see that 2 of the 4 mounting tabs are soldered to chassis, one of them is tucked under the audio output transformer. I also see that there is a fair amount of wiring that runs by this can. What should I do to make sure I don't booger up the adjacent wiring when unsoldering the can from the chassis? I assume you clip and re-strip the leads you remove from the tabs on the can, rather than trying to unsolder them? Should I unsolder and remove the audio output transformer? Also, are there any good web resources available that can educate me in some of the better techniques in component replacement used by the experts in boatanchor restoration? Thanks! de Bill, K9RZ ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] L-7 blew circuit breaker when turned on, what's up?
Hi, I have arrived in Europe and the L-7 seems to have made it without damage, at least no visual damage. The amp was wired for 220v when I had it in the USA. Upon arrival here, I switched the USA AC plug for a European plug. But as soon as I turned on the amp, the house circuit breaker blew. My first thought was that I had incorrectly installed the plug, but I have checked with an ohm meter and no sign of a short. There is infinite resistance between each pin of the AC plug and ground, and there is infinite resistance between each of the two pins when the amp's on/off switch is turned off. When switched on, resistance between the two pins is about 1 ohm, which I believe is as it should be. There should be no polarity issue between the 2 pins, correct? Any thoughts on what might be wrong and how to test it safely before applying AC power again? 73, Bill NZ5N/OM9ACA ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] L-7 blew circuit breaker when turned on, what's up?
It looks like we have it working now, please disregard prior message. 73, Bill --- On Sat, 6/5/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: L-7 blew circuit breaker when turned on, what's up? To: drakelist@zerobeat.net Date: Saturday, June 5, 2010, 11:44 AM Hi, I have arrived in Europe and the L-7 seems to have made it without damage, at least no visual damage. The amp was wired for 220v when I had it in the USA. Upon arrival here, I switched the USA AC plug for a European plug. But as soon as I turned on the amp, the house circuit breaker blew. My first thought was that I had incorrectly installed the plug, but I have checked with an ohm meter and no sign of a short. There is infinite resistance between each pin of the AC plug and ground, and there is infinite resistance between each of the two pins when the amp's on/off switch is turned off. When switched on, resistance between the two pins is about 1 ohm, which I believe is as it should be. There should be no polarity issue between the 2 pins, correct? Any thoughts on what might be wrong and how to test it safely before applying AC power again? 73, Bill NZ5N/OM9ACA ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] FS R-8A w/VHF converter
Hello to the group, I have an R-8A with the VHF converter for sale. If anyone is interested, please contact me at wd8...@yahoo.com. Tnx 73, Bill ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Repacement for R12 fuse resistor on L-4B and L-7 power supply?
OK, a local ham kindly gave me a spare glitch resistor as a replacement for R12, and the Drake has been repaired, tested, and then packed for the trip. The homebrew 5m amp has been reconnected to its internal HV p/s, tested, and then packed. I may never find out what caused R12 to blow, because I'm disinclined to mess with the power supply switch again. Sure would be nice to get higher voltage on the 6m amp, because I'm sure the 3-500Z would give me double the current 350w output with a better p/s, but c'est la vie. Thanks to all who responded, both on the forum and offline. 73, Bill --- On Mon, 5/31/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: Repacement for R12 fuse resistor on L-4B and L-7 power supply? To: drakelist@zerobeat.net Date: Monday, May 31, 2010, 3:04 PM Well, I have determined that the cause of my power supply problem is R12, the .82 ohm 2 watt resistor on the B+ output of the power supply. It is visibly damaged. I have searched this list and elsewhere and it seems there is a split of opinion on whether to replace R12 with a similar resistor. Rich Measures and others have suggested using instead a 10 ohm 10 watt wirewound resistor. I am leaving for Europe on Wednesday and need to find a replacement quickly. Radio Shack has a 10 ohm 10 watt wirewound that I can get locally if that will work. Don't think I have time for any mail order. What do you think, will the Radio Shack one work? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Repacement for R12 fuse resistor on L-4B and L-7 power supply?
Well, I have determined that the cause of my power supply problem is R12, the .82 ohm 2 watt resistor on the B+ output of the power supply. It is visibly damaged. I have searched this list and elsewhere and it seems there is a split of opinion on whether to replace R12 with a similar resistor. Rich Measures and others have suggested using instead a 10 ohm 10 watt wirewound resistor. I am leaving for Europe on Wednesday and need to find a replacement quickly. Radio Shack has a 10 ohm 10 watt wirewound that I can get locally if that will work. Don't think I have time for any mail order. What do you think, will the Radio Shack one work? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] L-4B and L-7 power supply: Amp plate voltage drops to zero when PTT pressed, help please
Hello, As you may know from my prior post, I have a homebrew 6m 3-500Z amp that I am trying to get to work with a Drake L-7 power supply, so far without success. The amp has an internal power supply, with the HV disconnected. I have the B+ of Drake p/s connected directly to the same spot where the B+ from the internal p/s had been connected, and I have the B- of the the Drake p/s connected to chassis ground. Using a high voltage probe, today I verified that the Drake p/s is providing 2800 vdc directly on the plate of the 3-500Z, when everything is turned on but the PTT is not engaged. But when the PTT is engaged, even with no drive, plate voltage immediately drops to zero. My first thought was a B+ to B- short, but this would have caused a big bang, and nothing is banging or smoking or doing anything unusual at all. No fuse or circuit breaker pops. When the the PTT is pressed, a DPDT relay closes. One side activates the T/R coaxial relay, and the other side grounds the center tap of the filament transformer via the plate current meter. These are the only things that happen when the PTT is engaged. In the absence of a filament to plate short (which would have self-diagnosed with a bang), I can't imagine any reason why pressing the PTT would cause the plate voltage to drop to zero. Anyone have any idea at all what might be going on? It almost seems like the Drake p/s is shutting itself off when the PTT is engaged, and then turning itself back on when the PTT is released. The Drake p/s does not have any sort of internal shut down mechanism, does it? Thanks for any thoughts and 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] L-4B and L-7 power supply question
Hi, The B- of the power supply for the Drake L-4B and L-7 goes to pin 6 of the Cinch connector. Inside the amp, the B- is floated above ground by a one ohm resistor. The one ohm resistor that floats B- above ground is said to be for the purpose of plate current metering. I do not quite understand how this resistor is needed for plate current meter accuracy. Could someone please tell me how that works? I have an L-7 and a homebrew amp that uses a similar power supply. However, in the homebrew amp the B- goes directly to ground. I'm trying to understand the difference in the configurations. Thanks and 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] L-4B and L-7 power supply question
Garey, Thanks for the reply. I still don't get why the resistor is needed. The ammeter is in series with the flow of the current, so what does the resistor do? What would happen if B- went directly to ground? I'm sure the answer is simple but for some reason it is evading me. 73, Bill Bill - It's just a relatively safer way (low voltage) to measure current of a high voltage supply. Any current that goes OUT of the supply on the positive end MUST come IN via the negative end, or vice-versa depending upon whether you learned your electronics in the military or civilian schools! Anyway, the resistor is near ground, (unless it opens!,) and so connecting it to a panel meter is much safer than having the meter connect across a shunt resistor somewhere up in the HV area of the supply. 73, Garey - K4OAH --- On Sat, 5/29/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: L-4B and L-7 power supply question To: drakelist@zerobeat.net Date: Saturday, May 29, 2010, 9:56 AM Hi, The B- of the power supply for the Drake L-4B and L-7 goes to pin 6 of the Cinch connector. Inside the amp, the B- is floated above ground by a one ohm resistor. The one ohm resistor that floats B- above ground is said to be for the purpose of plate current metering. I do not quite understand how this resistor is needed for plate current meter accuracy. Could someone please tell me how that works? I have an L-7 and a homebrew amp that uses a similar power supply. However, in the homebrew amp the B- goes directly to ground. I'm trying to understand the difference in the configurations. Thanks and 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Using HV from L-4B and L-7 power supply on another amp
Thanks to Garey and to those who replied off-line to my question about the one ohm resistor. May I trouble you with another question? I have a homebrew 6m 3-500Z amp with similar circuitry to the L-7 and L-4B. Unfortunately, its power supply is not that beefy (2000v) and I don't get full output. So I came up with the idea of trying to connect my L-7 power supply to the other amp. To do this, I disconnected the homebrew amp's internal p/s HV connections (leaving in place the internal p/s's filament, relay, and blower connections) and attempted to connect the Drake p/s. I connected the Drake p/s's HV cable to the homebrew amp's B+ connection, and I connected the Drake p/s's B- connection (pin 6 of the Cinch connector) to ground on the homebrew amp. I also grounded the chassis' together. To turn the Drake p/s on, I jumpered pins 1 and 3 of the Cinch connector. After hooking all this up, I turned everything on and it did not work. There was no RF output at all from the homebrew amp. The plate current meter showed some plate current, but much less than usual. What am I doing wrong? All I can think of is that I'm forgetting to make some connection, or that I have the Drake p/s AC input wired wrong. Jumpering pins 1 and 3 seems to be the equivalent of turning the Power switch to On and turning the CW Tune/SSB switch to SSB, but perhaps I'm reading this wrong or forgetting something. Any thoughts or ideas would be greatly appreciated. 73, Bill NZ5N --- On Sat, 5/29/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: Re: L-4B and L-7 power supply question To: drakelist@zerobeat.net Cc: k4...@mindspring.com Date: Saturday, May 29, 2010, 11:26 AM Garey, Thanks for the reply. I still don't get why the resistor is needed. The ammeter is in series with the flow of the current, so what does the resistor do? What would happen if B- went directly to ground? I'm sure the answer is simple but for some reason it is evading me. 73, Bill Bill - It's just a relatively safer way (low voltage) to measure current of a high voltage supply. Any current that goes OUT of the supply on the positive end MUST come IN via the negative end, or vice-versa depending upon whether you learned your electronics in the military or civilian schools! Anyway, the resistor is near ground, (unless it opens!,) and so connecting it to a panel meter is much safer than having the meter connect across a shunt resistor somewhere up in the HV area of the supply. 73, Garey - K4OAH --- On Sat, 5/29/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: L-4B and L-7 power supply question To: drakelist@zerobeat.net Date: Saturday, May 29, 2010, 9:56 AM Hi, The B- of the power supply for the Drake L-4B and L-7 goes to pin 6 of the Cinch connector. Inside the amp, the B- is floated above ground by a one ohm resistor. The one ohm resistor that floats B- above ground is said to be for the purpose of plate current metering. I do not quite understand how this resistor is needed for plate current meter accuracy. Could someone please tell me how that works? I have an L-7 and a homebrew amp that uses a similar power supply. However, in the homebrew amp the B- goes directly to ground. I'm trying to understand the difference in the configurations. Thanks and 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Power supply connectors for L-7 and L-4B
Hello, I have a homebrew 6 meter RF deck using a 3-500Z tube. I was thinking I could power it with my L-7 power supply. The big 8 pin connector appears to be a standard Cinch connector. What about the High Voltage connector, what is that? And where could such a connector be purchased? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Power supply connectors for L-7 and L-4B
Yes, Evan, Millen no. 37001-D, in case anyone else is thinking about building an RF deck using the Drake power supply. It's not cheap ($15 shipped) and some say it is unreliable and even dangerous, but I don't want to change the connector on such a classic amp. The Cinch connector was also expensive ($20 shipped) and quite tough to find. 73, Bill NZ5N --- On Mon, 5/24/10, k9...@aol.com k9...@aol.com wrote: From: k9...@aol.com k9...@aol.com Subject: Re: [Drakelist] Power supply connectors for L-7 and L-4B To: billdz@yahoo.com, drakelist@zerobeat.net Date: Monday, May 24, 2010, 8:30 AM Bill, That connector is a standard Millen connector. They are available at RF Parts, Upay (Ebay), and elsewhere. 73, Evan -Original Message- From: Bill Dzurilla billdz@yahoo.com To: drakelist@zerobeat.net Sent: Mon, May 24, 2010 7:15 am Subject: [Drakelist] Power supply connectors for L-7 and L-4B Hello, I have a homebrew 6 meter RF deck using a 3-500Z tube. I was thinking I could power it with my L-7 power supply. The big 8 pin connector appears to be a standard Cinch connector. What about the High Voltage connector, what is that? And where could such a connector be purchased? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
Many thanks to all who watched the video and emailed me with ideas. I have watched it 50 times and I'm now convinced that the arc occurred in the plate cap stator that has the white graffiti-like traces, as described in a prior post. The flashes on the coil are just reflections. If you look carefully through the plastic bubble on back of the plate current meter, you can see the arc originating in the plate tuning capacitor. Suggested fixes have included: * replacing the mica caps mounted underneath the rear wafer of the bandswitch, * replacing the plate blocking capacitors, * polishing or totally removing the stator with the white traces, * Carl's suggestion below to try a piece of insulation between the coil and the cap. Have not yet tried any of these suggestions, but please keep the ideas coming. 73, Bill NZ5N --- On Tue, 5/18/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: Re: Drake L-7 arc - plate capacitor issue? Now with video To: drakelist@zerobeat.net Date: Tuesday, May 18, 2010, 10:36 PM Thanks to all who responded on and off line. I removed the cover and tried it again. Rig was connected to a Heathkit Cantenna dummy load. As suggested by several, I set the Load control to 5 at the start, to prevent under-coupling. I made a video of the procedure and, as you can see at: http://www.youtube.com/watch?v=iJRyNQnkEWA There was arcing again. The arc occurs near the end of the video clip, at the 1:18 mark. You can see it on the first 2 turns of the coil that is on top of the Plate capacitor. Not sure if this is a reflection or if the coil itself was arcing. I did not see any arcing from the capacitor. Not sure how visible it is on YouTube, but I have watched this several times in slow motion. You can see a bit of the rotor of the Load capacitor on the left side of the screen, and also a bit of the output meter. At least in slo-mo, you can see output going up as I start to turn the Load cap to the left, then the tubes start to redden and the arc occurs. If the turning of the Load cap to the left resulted in under-coupling and caused the arc, I'm not sure how to proceed, because output was very low with the Load cap set at 5. Comments, ideas, advice? 73, Bill NZ5N issue? From: Jim Shorney jshor...@inebraska.com Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? To: drakelist@zerobeat.net drakelist@zerobeat.net Message-ID: 20100518034250.eab1b31b...@mail01.inebraska.com Content-Type: text/plain; charset=iso-8859-1 All the amp gurus must still be recovering from Dayton. Bill, you didn't mention if you were testing with an antenna or a dummy load. 73 -Jim On Sun, 16 May 2010 09:19:35 -0700 (PDT), Bill Dzurilla wrote: I opened up the amp and everything looks OK, except for one of the 25 or so stators on the plate tuning capacitor has graffiti-like white traces on it. I suspect this is the source of the 80m arcing, as the rotor does not the spot with the traces on 40m and up. I have not tried the amp on 160m, but if my theory is correct it would arc on 160 as well as 80. The capacitor plates are not dented or deformed in any way. So, do you think this is the source of the problem? If yes, is there any fix? 73, Bill NZ5N --- On Fri, 5/14/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: Drake L-7 arc and loose band switch knob To: drakelist@zerobeat.net Date: Friday, May 14, 2010, 10:35 PM Hi, I recently acquired an L-7 amp and I tried it out today. I used my Pro II as the exciter and an amp keyer. There seems to be some problem on 80, unfortunately. On all bands, I started with 20 watts drive and slowly increased the drive while tuning for max output. When I got up to about 600 watts out on 80, I heard and saw through the meter a blue arc. This happened twice on 80, and I did not want to try it again. Not sure what this means, no arc on any other band. Any thoughts on what might be wrong on 80? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
Thanks, John. I noticed the black dot as well and it drove me crazy trying to figure it out. After many attempts to duplicate, it turned out to be the rotor on the Load cap. It disappears a moment before the arc because I was turning that control to the left at the time of the arc. That is what led me to believe, as explained by W8JI and others, that the arcing was being caused by inadequate loading. When I tried again and left the Load control on 5, there was no arcing. I had not noticed the difference between the 2 tubes until you mentioned it. Possibly just a result of the camera angle. If not, what could it mean? 73, Bill NZ5N --- On Wed, 5/19/10, w4...@aol.com w4...@aol.com wrote: From: w4...@aol.com w4...@aol.com Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video To: billdz@yahoo.com, drakelist@zerobeat.net Date: Wednesday, May 19, 2010, 3:20 PM In a message dated 5/18/2010 10:38:27 P.M. Eastern Daylight Time, billdz@yahoo.com writes: http://www.youtube.com/watch?v=iJRyNQnkEWA I notice 2 things: The tube nearest the transformer is displaying a red plate before the tube nearest the side panel and it appears to be more than the tube toward the panel side. I also notice what appears to be a small black dot near the first full turn of the plate coil. This is not on the ceramic as far as I can tell and is not one of the rivets holding the ceramic. It seems to disappear a split second before the arc is heard on the sound track. I don't have the cover off my L-7 so I can't duplicate what I am seeing bit that might be a clue to the problem. Good luck and please let us know what you find. 73, John, W4AWM ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
Thanks for the reminder about the cooling, Evan. The source of the arc is difficult to see in the video, but if you look through the plastic bubble that forms the back side of the plate current meter, you can see the source of the arc, in the Plate tuning capacitor. 73, Bill --- On Wed, 5/19/10, k9...@aol.com k9...@aol.com wrote: From: k9...@aol.com k9...@aol.com Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video To: w4...@aol.com, billdz@yahoo.com, drakelist@zerobeat.net Date: Wednesday, May 19, 2010, 5:09 PM Caution is in order when testing the amp for any significant period of time. With the top off, the base of the tubes will not get adequate cooling. Even though there are slots on the bottom side of the cabinet, with the top off most of the air to cool the tubes will come from above with little from below. Seeing the source of the arc is difficult in the video, it almost seems like it is coming from the green PC board type of capacitor. Hard to tell. 73, Evan -Original Message- From: w4...@aol.com To: billdz@yahoo.com; drakelist@zerobeat.net Sent: Wed, May 19, 2010 3:20 pm Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video In a message dated 5/18/2010 10:38:27 P.M. Eastern Daylight Time, billdz@yahoo.com writes: http://www.youtube.com/watch?v=iJRyNQnkEWA I notice 2 things: The tube nearest the transformer is displaying a red plate before the tube nearest the side panel and it appears to be more than the tube toward the panel side. I also notice what appears to be a small black dot near the first full turn of the plate coil. This is not on the ceramic as far as I can tell and is not one of the rivets holding the ceramic. It seems to disappear a split second before the arc is heard on the sound track. I don't have the cover off my L-7 so I can't duplicate what I am seeing bit that might be a clue to the problem. Good luck and please let us know what you find. 73, John, W4AWM ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake L-7 arc - plate capacitor issue?
Jim, The arc occurred with a dummy load, so the antenna system is not to blame. 73, Bill From: Jim Shorney jshor...@inebraska.com Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? To: drakelist@zerobeat.net drakelist@zerobeat.net Message-ID: 20100518034250.eab1b31b...@mail01.inebraska.com Content-Type: text/plain; charset=iso-8859-1 All the amp gurus must still be recovering from Dayton. Bill, you didn't mention if you were testing with an antenna or a dummy load. 73 -Jim ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
Thanks to all who responded on and off line. I removed the cover and tried it again. Rig was connected to a Heathkit Cantenna dummy load. As suggested by several, I set the Load control to 5 at the start, to prevent under-coupling. I made a video of the procedure and, as you can see at: http://www.youtube.com/watch?v=iJRyNQnkEWA There was arcing again. The arc occurs near the end of the video clip, at the 1:18 mark. You can see it on the first 2 turns of the coil that is on top of the Plate capacitor. Not sure if this is a reflection or if the coil itself was arcing. I did not see any arcing from the capacitor. Not sure how visible it is on YouTube, but I have watched this several times in slow motion. You can see a bit of the rotor of the Load capacitor on the left side of the screen, and also a bit of the output meter. At least in slo-mo, you can see output going up as I start to turn the Load cap to the left, then the tubes start to redden and the arc occurs. If the turning of the Load cap to the left resulted in under-coupling and caused the arc, I'm not sure how to proceed, because output was very low with the Load cap set at 5. Comments, ideas, advice? 73, Bill NZ5N issue? From: Jim Shorney jshor...@inebraska.com Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? To: drakelist@zerobeat.net drakelist@zerobeat.net Message-ID: 20100518034250.eab1b31b...@mail01.inebraska.com Content-Type: text/plain; charset=iso-8859-1 All the amp gurus must still be recovering from Dayton. Bill, you didn't mention if you were testing with an antenna or a dummy load. 73 -Jim On Sun, 16 May 2010 09:19:35 -0700 (PDT), Bill Dzurilla wrote: I opened up the amp and everything looks OK, except for one of the 25 or so stators on the plate tuning capacitor has graffiti-like white traces on it. I suspect this is the source of the 80m arcing, as the rotor does not the spot with the traces on 40m and up. I have not tried the amp on 160m, but if my theory is correct it would arc on 160 as well as 80. The capacitor plates are not dented or deformed in any way. So, do you think this is the source of the problem? If yes, is there any fix? 73, Bill NZ5N --- On Fri, 5/14/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: Drake L-7 arc and loose band switch knob To: drakelist@zerobeat.net Date: Friday, May 14, 2010, 10:35 PM Hi, I recently acquired an L-7 amp and I tried it out today. I used my Pro II as the exciter and an amp keyer. There seems to be some problem on 80, unfortunately. On all bands, I started with 20 watts drive and slowly increased the drive while tuning for max output. When I got up to about 600 watts out on 80, I heard and saw through the meter a blue arc. This happened twice on 80, and I did not want to try it again. Not sure what this means, no arc on any other band. Any thoughts on what might be wrong on 80? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake L-7 arc - plate capacitor issue?
I opened up the amp and everything looks OK, except for one of the 25 or so stators on the plate tuning capacitor has graffiti-like white traces on it. I suspect this is the source of the 80m arcing, as the rotor does not the spot with the traces on 40m and up. I have not tried the amp on 160m, but if my theory is correct it would arc on 160 as well as 80. The capacitor plates are not dented or deformed in any way. So, do you think this is the source of the problem? If yes, is there any fix? 73, Bill NZ5N --- On Fri, 5/14/10, Bill Dzurilla billdz@yahoo.com wrote: From: Bill Dzurilla billdz@yahoo.com Subject: Drake L-7 arc and loose band switch knob To: drakelist@zerobeat.net Date: Friday, May 14, 2010, 10:35 PM Hi, I recently acquired an L-7 amp and I tried it out today. I used my Pro II as the exciter and an amp keyer. There seems to be some problem on 80, unfortunately. On all bands, I started with 20 watts drive and slowly increased the drive while tuning for max output. When I got up to about 600 watts out on 80, I heard and saw through the meter a blue arc. This happened twice on 80, and I did not want to try it again. Not sure what this means, no arc on any other band. Any thoughts on what might be wrong on 80? 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake L-7 arc and loose band switch knob
Hi, I recently acquired an L-7 amp and I tried it out today. I used my Pro II as the exciter and an amp keyer. I got 1250 watts out into a dummy load on 40, 20 and 15, and 1000 watts out on 10. My understanding from a Google search is that this is about right, as the power supply is not beefy enough to push it to the 1500w legal limit. However, I did see some claims of this amp obtaining full legal limit, is this real with the stock p/s? There seems to be some problem on 80, unfortunately. On all bands, I started with 20 watts drive and slowly increased the drive while tuning for max output. When I got up to about 600 watts out on 80, I heard and saw through the meter a blue arc. This happened twice on 80, and I did not want to try it again. Not sure what this means, no arc on any other band. Any thoughts on what might be wrong on 80? I have not yet tried 160 or any of the WARC bands. Only other issue observed is that the band switch knob is a little loose. I tightened it as best I could but it still shifts a bit. Is this normal for an amp of this age, and is there any fix? Any thoughts, particularly on the 80m issue, would be appreciated. 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] L-7 amp soft start?
Anyone know where to find a soft start for the L-7? Jeff at Harbach told me his L-4B soft start does not work on the L-7, and his universal soft start does not work on either the L-7 or the L-4B. 73, Bill NZ5N ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R-4B Headphones
Hi all, I'm looking for an inexpensive set of headphones for my R-4B. My military surplus pair have died. Any recommendations? Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
