Re: [Drakelist] 2 Pin Plugs
Pat, Our listserve owner page has an interesting article by Tom Taylor about it. Second link here: http://www.zerobeat.net/drakelist/technotes.html 73, Ron WD8SBB --- On Thu, 12/22/11, Patrick Jones ars.w7...@gmail.com wrote: From: Patrick Jones ars.w7...@gmail.com Subject: [Drakelist] 2 Pin Plugs To: drakelist@zerobeat.net drakelist@zerobeat.net Date: Thursday, December 22, 2011, 8:29 PM Hi and happy holidays, I need to find the 2 pin plugs that are used off the power supplies for keying an amp like a L-4B. Any ides?? Thanks, Pat,W7EHM ___ 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] Speaking of breaking Glass...
Wow. Yes, I had always heard the stories of that happening, but never saw one. Mine is almost hard to see, it didn't cave in the surrounding glass--just a very slight stress crack and a little inverted pimple where the hole is. Filaments still good. Sweep tubeshate em even tho they have given me excellent service thru the years. On 12/22/2011 9:19 PM, Jim Shorney wrote: On Thu, 22 Dec 2011 12:54:59 -0500, Curt wrote: It got so hot, the glass melted and a hole was sucked thru the side without breaking the rest of the tube. I saw something similar years ago in a sweep that was pulled from one of those horribly designed 11-Meter amps. The glass had been sucked inward and melted to the outside of the plate structure in one spot. It's been over 35 years ago, but I think I recall that the vacuum actually held. 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime. HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ 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] Help finding info about alternate FS4 (100 kHz reference version) by W6NBI
Hi All, I followed the link in that other post to an archive of Ham Radio Magazine. This because I too was curious about how the digital alternative for the Drake FS4 frequency synthesizer, as mentioned in this post, looked like in those days. I had a very good time reading! And also, browsing trough the rest of that copy of Ham Radio Magazine was nice, giving a good view on that era in Ham radio. Thanks a lot for that link - I guess I will be reading a lot more there! But. I got really (historically) interested in that alternative for the FS4 after reading I know its design is very dated and nowadays there are far better solutions like integrated circuit DDS's etc. but still... I searched the internet if I could find more about it. I found a follow-up of the article, or better a letter in HRM from the author W6NBI, mentioning additional info and a version with a 100 kHz reference. I could not find this additional info anywhere on the internet though. I did find in a posting from this list that the author had indicated not to be bothered anymore with questions about his (40+ years!) old design . So my question is: Is there anybody on this list who has or knows where to find this additional info? I hope somebody can help with this nice Drake history. (kind of anyway) ;-) 73's, Henry - PA0HJA On 12/21/2011 3:16 PM, Robert Fish wrote: Hi Guys, I am not sure how good the print quality is, but the entire collection of HR magazine (or most of) has recently been made available for download in PDF or just about any format you chose here: http://www.archive.org/search.php?query=collection%3Aham-radio-magazinesort=-publicdate By the way, 73 magazine archives are also available here: http://www.archive.org/search.php?query=collection%3A73-magazinesort=-publicdate I have already spent a bunch of time searching around through this stuff. Lotsa fun. 73, Bob K6GGO I think the discussion is now about the expanded preselector dial that came with the FS4. HR magazine had home brew FS4 in Aug 1972 issue. That article had a copy of the dial in print. That might be where you can pick off a high resolution image if you have an origial. I sold my incomplete set of HR mags when I purchased the entire PDF collection. The PDF of the page that the dial is on is not that great. OTOH you might be able to use it for a starting point to do image restoration and enhancement. Aug 1972 - Ham Radio (Pg. 6) Frequency Synthesizer for the Drake R-4 Receiver Author: Stein, Robert S., W6NBI Sorry if I misunderstood the thread. 73, Ron WD8SBB --- On Tue, 12/20/11, Jim Shorneyjshor...@inebraska.com wrote: ___ 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] Help finding info about alternate FS4 (100 kHz reference version) by W6NBI
Henry, I was in contact with Mr Stein, and am likely the poster of said found reference on this list. He did send me the data electronically. I thought I had a copy on an old backup/archive, but after spending several hours looking, it is not to be found. As I recall the big thing was different buffering and/or filtering to reduce the 100KHz spurs. 73, Ron WD8SBB --- On Fri, 12/23/11, Henry Vredegoor henry.vredeg...@gmail.com wrote: From: Henry Vredegoor henry.vredeg...@gmail.com Subject: [Drakelist] Help finding info about alternate FS4 (100 kHz reference version) by W6NBI To: Drakelist@zerobeat.net Date: Friday, December 23, 2011, 9:17 AM Hi All, I followed the link in that other post to an archive of Ham Radio Magazine. This because I too was curious about how the digital alternative for the Drake FS4 frequency synthesizer, as mentioned in this post, looked like in those days. I had a very good time reading! And also, browsing trough the rest of that copy of Ham Radio Magazine was nice, giving a good view on that era in Ham radio. Thanks a lot for that link - I guess I will be reading a lot more there! But. I got really (historically) interested in that alternative for the FS4 after reading I know its design is very dated and nowadays there are far better solutions like integrated circuit DDS's etc. but still... I searched the internet if I could find more about it. I found a follow-up of the article, or better a letter in HRM from the author W6NBI, mentioning additional info and a version with a 100 kHz reference. I could not find this additional info anywhere on the internet though. I did find in a posting from this list that the author had indicated not to be bothered anymore with questions about his (40+ years!) old design . So my question is: Is there anybody on this list who has or knows where to find this additional info? I hope somebody can help with this nice Drake history. (kind of anyway) ;-) 73's, Henry - PA0HJA On 12/21/2011 3:16 PM, Robert Fish wrote: Hi Guys, I am not sure how good the print quality is, but the entire collection of HR magazine (or most of) has recently been made available for download in PDF or just about any format you chose here: http://www.archive.org/search.php?query=collection%3Aham-radio-magazinesort=-publicdate By the way, 73 magazine archives are also available here: http://www.archive.org/search.php?query=collection%3A73-magazinesort=-publicdate I have already spent a bunch of time searching around through this stuff. Lotsa fun. 73, Bob K6GGO I think the discussion is now about the expanded preselector dial that came with the FS4. HR magazine had home brew FS4 in Aug 1972 issue. That article had a copy of the dial in print. That might be where you can pick off a high resolution image if you have an origial. I sold my incomplete set of HR mags when I purchased the entire PDF collection. The PDF of the page that the dial is on is not that great. OTOH you might be able to use it for a starting point to do image restoration and enhancement. Aug 1972 - Ham Radio (Pg. 6) Frequency Synthesizer for the Drake R-4 Receiver Author: Stein, Robert S., W6NBI Sorry if I misunderstood the thread. 73, Ron WD8SBB --- On Tue, 12/20/11, Jim Shorneyjshor...@inebraska.com wrote: ___ 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] problem with deoxit
Today I put a totally dead R-4a on the bench,replaced the fuse and off she went. The rig was fairly clean considering its age. The rig lit up and got some audio out and all functions seemed to basically work. Cleaned the chassis of dust ,damp cloth and proceeded to pull all the tubes and test,all were good. I took a emery board and cleaned all tube pins then wiped the pins with Deoxit and dried with a cloth, also cleaned all the wafer switch contacts with deoxit,using the tiny needle bottle being VERY careful to keep the deoxit to the very small amount, also cleaned all the pots with the deoxit spray for pots. Any way let the rig sit for a few hours working all the switch's and pots. Reassembled the rig and powered up. The radio lite up and that was about all ,nothing seemed to work, rechecked the tube install,all correct, put back on the bench flipped the rig over and ALL the tube sockets and wafer switch's looked like they were flooded with deoxit. I was careful to use as Little as you could of the deoxit,while cleaning everything. I then proceeded to clean EVERYTHING with 100 %alcohol, tube pins,sockets, all wafer switch's and pots,made sure everything was dry, using a hair drier. Put the rig back together and turned on,the R4A works as well as my B line receiver,even without a alignment. Has there been a change in Deoxit? I have used this procedure on lots of Boat anchors and up till now always worked fine. Can't believe the TINY amount I used, crawled all over everywhere I didn't want it to go. Unless someone else had used some other substance to clean before me and the the deoxit ,I haven't got a clue. Anyone else run across anything like this? The deoxit was brand new a week ago. I think I will star with the 100% alcohol,like I used to use. everybody have a Merry Christmas dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] problem with deoxit
Dale I rarely use Deoxit in tube sockets unless I have reason to believe the sockets have oxidized and are causing issues. If you do use it in tube sockets its best to dip a round toothpick in Deoxit and insert that into the individual sockets, giving it several turns. I have also applied Deoxit directly to the tube pins themselves with a cotton swab then installed the tube in/out of the socket several times. I have never had a problem in almost 20 years of using Deoxit. You have to be careful in high impendence circuits involving tube sockets, you’ll create shorts. 73, Gary___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] problem with deoxit
I have found that 100% DeOxit dries more slowly than the 5% stuff because the latter is mostly carrier. So allow a little extra time before powering up, especially with pots. A few hours should have been enough, so it seems that you applied too much. I almost always use the 100% stuff but I avoid droplets. Instead I apply the DeOxit to one of those wooden stemmed tightly woven Q tips that are made especially for electrical cleaning. The Q tip then does double duty of applicator and scrubber. This works really well for wafer switches and tube pins. For socket pins, I use a wooden toothpick that is coated with DeOxit. Once again it serves as applicator and scrubber. The Q tip and toothpick end up with a satisfying dark coloration of oxides with this method. Sufaces will glisten after cleaning but you won't see any red pooling. With DeOxit a little goes a very long way. Mild scrubbing with a rough absorbant surface such as wood or tightly woven Q tip physically removes the dissolved oxides. Dennis AE6C On 12/23/11, y...@aol.com y...@aol.com wrote: Today I put a totally dead R-4a on the bench,replaced the fuse and off she went. The rig was fairly clean considering its age. The rig lit up and got some audio out and all functions seemed to basically work. Cleaned the chassis of dust ,damp cloth and proceeded to pull all the tubes and test,all were good. I took a emery board and cleaned all tube pins then wiped the pins with Deoxit and dried with a cloth, also cleaned all the wafer switch contacts with deoxit,using the tiny needle bottle being VERY careful to keep the deoxit to the very small amount, also cleaned all the pots with the deoxit spray for pots. Any way let the rig sit for a few hours working all the switch's and pots. Reassembled the rig and powered up. The radio lite up and that was about all ,nothing seemed to work, rechecked the tube install,all correct, put back on the bench flipped the rig over and ALL the tube sockets and wafer switch's looked like they were flooded with deoxit. I was careful to use as Little as you could of the deoxit,while cleaning everything. I then proceeded to clean EVERYTHING with 100 %alcohol, tube pins,sockets, all wafer switch's and pots,made sure everything was dry, using a hair drier. Put the rig back together and turned on,the R4A works as well as my B line receiver,even without a alignment. Has there been a change in Deoxit? I have used this procedure on lots of Boat anchors and up till now always worked fine. Can't believe the TINY amount I used, crawled all over everywhere I didn't want it to go. Unless someone else had used some other substance to clean before me and the the deoxit ,I haven't got a clue. Anyone else run across anything like this? The deoxit was brand new a week ago. I think I will star with the 100% alcohol,like I used to use. everybody have a Merry Christmas dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] problem with deoxit
How I learned to be paranoid with cleaning agents: When I was a mere teen-ager, I decided to clean the mode switch in my HW-101 with some contact cleaner that my brother had brought home from work. I hosed the switch down well, waited a few minutes, and turned the rig on. The mode switch smoked. Literally. Fortunately , the HW-101 was still in production at that time, and I was able to get a new switch quickly and cheap. We don't have that luxury today. I learned an important lesson that day. 73 -Jim NU0C On Fri, 23 Dec 2011 12:44:03 -0500, Curt wrote: I do the same as Garyapply small amounts to the pins...easier to see how much you are applying...rather than putting it down the sockets. On 12/23/2011 12:19 PM, Gary Poland wrote: You have to be careful in high impendence circuits involving tube sockets, you'll create shorts. -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime. HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] problem with deoxit
Is the lesson, never trust your older brother? Bob K6GGO How I learned to be paranoid with cleaning agents: When I was a mere teen-ager, I decided to clean the mode switch in my HW-101 with some contact cleaner that my brother had brought home from work. I hosed the switch down well, waited a few minutes, and turned the rig on. The mode switch smoked. Literally. Fortunately , the HW-101 was still in production at that time, and I was able to get a new switch quickly and cheap. We don't have that luxury today. I learned an important lesson that day. 73 -Jim NU0C ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] problem with deoxit
On Fri, 23 Dec 2011 10:46:19 -0800, Robert Fish wrote: Is the lesson, never trust your older brother? No, I already knew that one ;) Although he pobably should have learned to never let stuff like that lay around where I could find it. 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime. HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Morse Key
Hi all, Do we have any collectors of old morse straight keys in the group? I suddenly find myself with a an original well used/abused WW2, J41A ( which is an unusual piece) to dispose of. This was from a 90+ yr old lady, and I don't think she wanted to give it away, more like she's disposing of things. (scrounging ?) Carl wd8nhk___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Morse Key
- Original Message - From: gypsym...@aol.com To: drakelist@zerobeat.net Sent: Friday, December 23, 2011 12:07 PM Subject: [Drakelist] Morse Key Hi all, Do we have any collectors of old morse straight keys in the group? I suddenly find myself with a an original well used/abused WW2, J41A ( which is an unusual piece) to dispose of. This was from a 90+ yr old lady, and I don't think she wanted to give it away, more like she's disposing of things. (scrounging ?) Carl wd8nhk I am a small collector. If you want to find out what its worth I would search ebay for closed auctions. There is also a Morse Code list where you might get some help. I have no idea of the value of this thing. http://mailman.qth.net/mailman/listinfo/morsecode -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] problem with deoxit
In addition to the wooden stemmed tightly woven Q tips that are made especially for electrical cleaning mentioned by Dennis, AE6C, I also use the brushes listed below. A drop of DeoxIT on either goes a long way. These brushes are great for cleaning 7 9 pin tube sockets: http://www.gumbrand.com/interdental-brushes/products/gum-go-betweens-proxabrush-cleaners-wide/872rn/ These brushes are good for cleaning RCA connectors, 8 pin and other larger tube sockets, etc: http://www.mcmelectronics.com/product/CAIG-LABORATORIES-AB-50-/200-288 Ken WA2LBI On Fri, Dec 23, 2011 at 13:06, Dennis Monticelli dennis.montice...@gmail.com wrote: I have found that 100% DeOxit dries more slowly than the 5% stuff because the latter is mostly carrier. So allow a little extra time before powering up, especially with pots. A few hours should have been enough, so it seems that you applied too much. I almost always use the 100% stuff but I avoid droplets. Instead I apply the DeOxit to one of those wooden stemmed tightly woven Q tips that are made especially for electrical cleaning. The Q tip then does double duty of applicator and scrubber. This works really well for wafer switches and tube pins. For socket pins, I use a wooden toothpick that is coated with DeOxit. Once again it serves as applicator and scrubber. The Q tip and toothpick end up with a satisfying dark coloration of oxides with this method. Sufaces will glisten after cleaning but you won't see any red pooling. With DeOxit a little goes a very long way. Mild scrubbing with a rough absorbant surface such as wood or tightly woven Q tip physically removes the dissolved oxides. Dennis AE6C On 12/23/11, y...@aol.com y...@aol.com wrote: Today I put a totally dead R-4a on the bench,replaced the fuse and off she went. The rig was fairly clean considering its age. The rig lit up and got some audio out and all functions seemed to basically work. Cleaned the chassis of dust ,damp cloth and proceeded to pull all the tubes and test,all were good. I took a emery board and cleaned all tube pins then wiped the pins with Deoxit and dried with a cloth, also cleaned all the wafer switch contacts with deoxit,using the tiny needle bottle being VERY careful to keep the deoxit to the very small amount, also cleaned all the pots with the deoxit spray for pots. Any way let the rig sit for a few hours working all the switch's and pots. Reassembled the rig and powered up. The radio lite up and that was about all ,nothing seemed to work, rechecked the tube install,all correct, put back on the bench flipped the rig over and ALL the tube sockets and wafer switch's looked like they were flooded with deoxit. I was careful to use as Little as you could of the deoxit,while cleaning everything. I then proceeded to clean EVERYTHING with 100 %alcohol, tube pins,sockets, all wafer switch's and pots,made sure everything was dry, using a hair drier. Put the rig back together and turned on,the R4A works as well as my B line receiver,even without a alignment. Has there been a change in Deoxit? I have used this procedure on lots of Boat anchors and up till now always worked fine. Can't believe the TINY amount I used, crawled all over everywhere I didn't want it to go. Unless someone else had used some other substance to clean before me and the the deoxit ,I haven't got a clue. Anyone else run across anything like this? The deoxit was brand new a week ago. I think I will star with the 100% alcohol,like I used to use. everybody have a Merry Christmas dale wt4t ___ 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
