Re: [neonixie-l] Re: Lc-516 info?
I made a clock with those tubes few years ago and I can confirm they do not fail as quickly - they are still fine. Colour of the discharge suggests there was more mercury used than in regular tubes. Great replacement for IN-1, but I would pick different tube if I was to make a new clock - the bakelite base makes the tube much larger without increasing the digit size, so the digits are far away from each other. Also the base is non-standard. piątek, 27 sierpnia 2021 o 19:26:33 UTC+2 Terry Bowman napisał(a): > The imaginary Nixie tube: IN-*i* > > On Aug 27, 2021, at 9:08 AM, Yohan Park wrote: > > Which tube isn't? ;) > > On Thursday, August 26, 2021 at 12:31:14 PM UTC+2 Bill Notfaded wrote: > >> These tubes are better than the IN-1 tubes for sure! >> > > > Terry Bowman, KA4HJH > "The Mac Doctor" > > https://www.astarcloseup.com > > “...the book said something astonishing, a very big thought. The stars, it > said, were suns but very far away. The Sun was a star but close up.”—Carl > Sagan, "The Backbone Of Night", *Cosmos*, 1980 > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/107e349d-3c79-42aa-94bc-bc8974e4ee40n%40googlegroups.com.
Re: [neonixie-l] Nixie Nirvana
Tape the tube to a wooden dowel, like a closet rod, and pin one end on a carpeted surface so that you can smack the entire length of the dowel (with the taped 7971) against the carpeted floor. This will transfer the shock to the full height of the 7971 and separate the overlapping segment ends. I usually tape the tube tightly with masking tape so that the face of the digits is perpendicular to the floor. I've successfully fixed at least a half dozen tubes this way and not broken any. I know that there have been other threads with photos. And yes, you will feel really apprehensive when you do it the first time. I haven't had one that didn't get cured... Jeff Original message From: 'Ian' via neonixie-l Date: 8/27/21 2:48 PM (GMT-06:00) To: neonixie-l@googlegroups.com Subject: Re: [neonixie-l] Nixie Nirvana I’m not heard of the wooden dowel method. Is that just hitting the tube?In the darkIanVOn 26 Aug 2021, at 15:56, Robert G. Schaffrath wrote:$1 for a B-7971?!?! Incredible. The best price I ever saw was late 1970's/early 1980's when they were still common. As I mentioned in the past, I got six NOS B-7971's around that time from Meshna Electronics for $5/each IIRC. The used ones were $1 cheaper and I decided to splurge. The first eight tubes I got came in pairs on the old stock ticker boards. One tube was defective leaving me with seven good ones. I believe I paid something like $8/each for the boards. Some from Poly Paks and some from Meshna. It has been so long many of the details escape me. I still have that "defective" tube that I have been debating about selling. It had shorted segments and various attempts at fixing it over they years before learning about the "wooden dowel" method that worked resulted in some segments getting damaged. Tube still intact and several segments still light up so it is useful as a novelty but it will not display all possible segments that a good B-7971 will. It is wrapped in bubble wrap sitting in an odds-and-ends box which is why I am thinking of parting with it. I am not using it.RobertOn Thursday, August 26, 2021 at 6:36:35 AM UTC-4 Bill Notfaded wrote:Jeffrey-Where there any big Borroughs or NL tubes vertical or round?BillOn Wednesday, August 25, 2021 at 1:46:02 PM UTC-7 Jeffry P wrote:Hi Nick,I've been lurking in this group since its creation. Most of the discussion is a bit beyond me but interesting nonetheless. Some members were asking where the pictures were- I was referring to the pictures listed on the Facebook group. I have not posted any pictures anywhere. I'm about halfway through sorting tubes into bins, so that all alike types are together. Burroughs has the lead as far as variety with National right behind.Valvo and Amperex are well represented. This coming weekend I should be able to finish sorting. I'll post some pictures when the sorting is finished. Thank you to all who have sent encouraging words. I was concerned that some folks would be out of joint because I went in and got everything. If you were planning on going to Huntsville for nixies this weekend I apologize. There were some meters left that someone might be interested in. I'm referring to the photos on the Facebook page (Harpers Home Estate Sales). The collection came from Michael Seaton. He had a few posts here and his name was in his email address.JeffryOn Tue, Aug 24, 2021 at 10:30 PM Nicholas Stock wrote:Hi Jeffry, welcome to the group!!!As a long time Nixie fan, clock builder, collector etc, I applaud you for keeping the treasure trove together. I noted a lot of highly sought after goodies in the photos (including a rather excessive number of old Axiris VU meters!). As a fellow nixie/neon nutcase and one of the moderators of the group, let me know if there's anything I(we) can do to help you with info, pricing etcthere are a lot of really knowledgeable and thoughtful folks on this list and whilst a lot of us are probably agog at the collection, deep-down we're happy that it is all in one place and with someone who knows its value (not just monetarily).Cheers,NickOn Mon, Aug 23, 2021 at 6:16 PM Audrey wrote:You should give them to me :)On Mon, Aug 23, 2021 at 9:14 PM Jeffry Portell wrote:Yes he and I are the same age. I need to think about where all this should go in the event of my demise.On Mon, Aug 23, 2021, 3:27 PM Jeff Walton wrote:Nice to hear that someone from the group was able to make the trip. You are fortunate to have your hands on such a treasure trove of antiquities! Looking forward to seeing photos of the collection. Eventually we all have collections that will change hands, some sooner than others... Jeff Original message From: Jeffry P Date: 8/23/21 11:15 AM (GMT-06:00) To: neonixie-l Subject: [neonixie-l] Nixie Nirvana Good morning to all! I joined the original Neonixie-l group on Yahoo many years ago when Raymond W. was moderator. I had
Re: [neonixie-l] Nixie Nirvana
I’m not heard of the wooden dowel method. Is that just hitting the tube? In the dark IanV > On 26 Aug 2021, at 15:56, Robert G. Schaffrath > wrote: > > $1 for a B-7971?!?! Incredible. The best price I ever saw was late > 1970's/early 1980's when they were still common. As I mentioned in the past, > I got six NOS B-7971's around that time from Meshna Electronics for $5/each > IIRC. The used ones were $1 cheaper and I decided to splurge. The first eight > tubes I got came in pairs on the old stock ticker boards. One tube was > defective leaving me with seven good ones. I believe I paid something like > $8/each for the boards. Some from Poly Paks and some from Meshna. It has been > so long many of the details escape me. I still have that "defective" tube > that I have been debating about selling. It had shorted segments and various > attempts at fixing it over they years before learning about the "wooden > dowel" method that worked resulted in some segments getting damaged. Tube > still intact and several segments still light up so it is useful as a novelty > but it will not display all possible segments that a good B-7971 will. It is > wrapped in bubble wrap sitting in an odds-and-ends box which is why I am > thinking of parting with it. I am not using it. > > Robert > > >> On Thursday, August 26, 2021 at 6:36:35 AM UTC-4 Bill Notfaded wrote: >> Jeffrey- >> >> Where there any big Borroughs or NL tubes vertical or round? >> >> Bill >>> On Wednesday, August 25, 2021 at 1:46:02 PM UTC-7 Jeffry P wrote: >>> Hi Nick, >>> >>> I've been lurking in this group since its creation. Most of the discussion >>> is a bit beyond me but interesting nonetheless. Some members were asking >>> where the pictures were- I was referring to the pictures listed on the >>> Facebook group. I have not posted any pictures anywhere. I'm about halfway >>> through sorting tubes into bins, so that all alike types are together. >>> Burroughs has the lead as far as variety with National right behind.Valvo >>> and Amperex are well represented. This coming weekend I should be able to >>> finish sorting. I'll post some pictures when the sorting is finished. Thank >>> you to all who have sent encouraging words. I was concerned that some folks >>> would be out of joint because I went in and got everything. If you were >>> planning on going to Huntsville for nixies this weekend I apologize. There >>> were some meters left that someone might be interested in. I'm referring to >>> the photos on the Facebook page (Harpers Home Estate Sales). The collection >>> came from Michael Seaton. He had a few posts here and his name was in his >>> email address. >>> >>> Jeffry >>> On Tue, Aug 24, 2021 at 10:30 PM Nicholas Stock wrote: Hi Jeffry, welcome to the group!!! As a long time Nixie fan, clock builder, collector etc, I applaud you for keeping the treasure trove together. I noted a lot of highly sought after goodies in the photos (including a rather excessive number of old Axiris VU meters!). As a fellow nixie/neon nutcase and one of the moderators of the group, let me know if there's anything I(we) can do to help you with info, pricing etcthere are a lot of really knowledgeable and thoughtful folks on this list and whilst a lot of us are probably agog at the collection, deep-down we're happy that it is all in one place and with someone who knows its value (not just monetarily). Cheers, Nick > On Mon, Aug 23, 2021 at 6:16 PM Audrey wrote: > You should give them to me :) > >> On Mon, Aug 23, 2021 at 9:14 PM Jeffry Portell >> wrote: >> Yes he and I are the same age. I need to think about where all this >> should go in the event of my demise. >> >>> On Mon, Aug 23, 2021, 3:27 PM Jeff Walton wrote: >>> Nice to hear that someone from the group was able to make the trip. >>> You are fortunate to have your hands on such a treasure trove of >>> antiquities! Looking forward to seeing photos of the collection. >>> Eventually we all have collections that will change hands, some sooner >>> than others... >>> >>> >>> Jeff >>> >>> >>> Original message >>> From: Jeffry P >>> Date: 8/23/21 11:15 AM (GMT-06:00) >>> To: neonixie-l >>> Subject: [neonixie-l] Nixie Nirvana >>> >>> Good morning to all! >>> >>> >>> >>> I joined the original Neonixie-l group on Yahoo many years ago when >>> Raymond W. was moderator. I had the privilege of paying him $100+ for a >>> ‘Four Letter Word’ kit that never arrived. Raymond was good at making >>> excuses ( waiting for parts, illness, earthquakes, no reliable help, >>> etc.) and always promised that no matter what I would get a kit. >>> Meanwhile, the time had run out for a refund. The (4) B7971’s were >>>
Re: [neonixie-l] Re: Lc-516 info?
The imaginary Nixie tube: IN-i > On Aug 27, 2021, at 9:08 AM, Yohan Park wrote: > > Which tube isn't? ;) > > On Thursday, August 26, 2021 at 12:31:14 PM UTC+2 Bill Notfaded wrote: > These tubes are better than the IN-1 tubes for sure! Terry Bowman, KA4HJH "The Mac Doctor" https://www.astarcloseup.com “...the book said something astonishing, a very big thought. The stars, it said, were suns but very far away. The Sun was a star but close up.”—Carl Sagan, "The Backbone Of Night", Cosmos, 1980 -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/7EA73AF2-547B-4E53-B93B-6DB9DC9ED205%40gmail.com.
[neonixie-l] Re: Air Force 1 - Numitron
New models are LEDs but at least they used a nice color. Spendy little clocks! On Friday, August 27, 2021 at 6:18:03 AM UTC-7 Dekatron42 wrote: > Davtron has the specifications: > https://www.davtron.com/product-detail.php?M877-17 ! > > Seems to cost around USD $480 at some places. Half price at eBay: > https://www.ebay.com/itm/Davtron-Chronometer-M877-/164283847188?_ul=IL > > /Martin > > On Friday, 27 August 2021 at 14:56:55 UTC+2 martin martin wrote: > >> Here's a bit of history! >> At the Reagan Library in Simi Valley, CA you'll find a retired Air Force >> One. It has seen 7 US presidents. >> >> Do you think any of them noticed one of three Numitron clocks? >> >> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/dcdf0d27-7959-479f-80b5-31dbc31d96e2n%40googlegroups.com.
[neonixie-l] Re: Air Force 1 - Numitron
Davtron has the specifications: https://www.davtron.com/product-detail.php?M877-17 ! Seems to cost around USD $480 at some places. Half price at eBay: https://www.ebay.com/itm/Davtron-Chronometer-M877-/164283847188?_ul=IL /Martin On Friday, 27 August 2021 at 14:56:55 UTC+2 martin martin wrote: > Here's a bit of history! > At the Reagan Library in Simi Valley, CA you'll find a retired Air Force > One. It has seen 7 US presidents. > > Do you think any of them noticed one of three Numitron clocks? > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/85281f14-8f03-4325-91aa-c50ed191n%40googlegroups.com.
[neonixie-l] Re: Lc-516 info?
Which tube isn't? ;) On Thursday, August 26, 2021 at 12:31:14 PM UTC+2 Bill Notfaded wrote: > These tubes are better than the IN-1 tubes for sure! > > Bill > On Wednesday, August 25, 2021 at 9:11:06 PM UTC-7 gerritde...@gmail.com > wrote: > >> I am currently trying to figure out if the LC-516 is a long life tube, >> since the in-1 is not. I cannot fine a data sheet for it. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/70cc4a03-57ec-496a-8490-a877190ddd67n%40googlegroups.com.
Re: [neonixie-l] VFD filament drive
Since transformers isn't my best area, I only have basic understanding of the intricacies but I have experimented some with different transformers in different cases like when driving Trochotrons and Dekatrons I decided to ask an acquaintance who has worked with transformers. His name is Ed Dinning, I got to know him over at the UKVRRR forum (UK Vintage Radio Repair and Restoration forum: https://www.vintage-radio.net/forum/), he told me you are welcome to contact him via me so that his email is somewhat protected - if you ask him anything related to the VFD-drivers it would be kind if you could post something here in this forum so we all can learn from it. This is his answer to my question on what transformer to chose for the driver in the article, it sure helped me and I hope it helps anyone who wants to experiment with this driver: "Hi Martin, as it operates about 50/100KHz virtually any ferrite should do. It should be a transformer type with no air gap. The turns are normally based on the transformer equation for square waves N= V/ 4 * F * B* Ae N=turns, V=volts F=frequency,B= flux density, typically 200/250mT for a ferrite, Ae the centre pole area in M^2 The actual losses come out later on in the design process and are not part of the initial criteria Copper sizing is normally based on 3A per mm^2 of cross sectional area The turns figure he gives looks about right for something like an RM10 core, or you could try an EE25 or an ETD29 core in sat F44 materials ETD's are the core of choice for this type of application and should be readily available. The more turns that are used the lower the iron losses and the cooler the core runs, but the copper losses increase unless fatter copper is used. Skin effect will be of minor importance at your frequency It would also work on a normal laminated core at 50Hz which should not be too big as you can run that at up to 1.5T flux density. Regulation could be a normal type of regulator set for constant current. Always many choices in Engineering Cheers, Ed Ed Dinning Retired Engineer" /Martin On Wednesday, 25 August 2021 at 23:02:48 UTC+2 Paul Andrews wrote: > When I have time, I will try the driver at the link Martin gave ( > http://www.nutsvolts.com/media-files/Forum-Articles/QA_201110.pdf), but > without the transformer initially. As far as I can tell, the transformer is > just to make the VFD drive isolated so you can pull it up above ground. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/856298da-08fd-4d88-8547-440d98d7045fn%40googlegroups.com.
