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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Michael,
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I have all the machine shop tools and skills to make my own. Time is the one thing that is in short supply. It is important to find a source if one exists. At the moment my needs are such that I could make them myself. In the future, depending on what happens with the VTCT I may have a need for more of these than I can reasonably make by hand because of how much time they take. Thanks for the link to the Amphenol catalog. That was very interesting reading. Dennis Tillman W7PF
-----Original Message-----
Sent: Monday, March 27, 2017 3:13 AM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Have you considered making your own? 1/8" phenolic or fiberglass epoxy sheet is cheap on Ebay, along with various sizes of round acrylic plastic disks. Thread some brass rod, and tap holes in the insulator of you choice. A nut on the reverse side will keep it secure. If there is enough interest, I could build a batch of them. I have 7 pin, 9 pin, and other tubes to use as models. I may still have some of the rare 10 in, which is a nine pin plus a single center pin which was used for some mixer applications. Noval and Compactron bases can be made the same way. I will be making some four pin plugs the make connectors for some obsolete batteries this way. The fun part is that the battery has the male pins, with 90VDC on two of the pins so I will add a switch to disable it until the plug is seated into the recessed connector. Here is a scan of an old Amphenol catalog that contains older tube sockets for your reference: http://www.tubebooks.org/file_downloads/Amphenol.pdf -----Original Message----- From: "'Dennis Tillman' dennis@ridesoft.com [TekScopes]"------------------------------------ Posted by: "Michael A. Terrell" <mike.terrell@earthlink.net> ------------------------------------
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Butch,
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Thanks for your first post. I hope you find reasons to do more in the future. I already knew about this site and their 9-pin socket saver. There are several sites selling the 9-pin socket savers. So far nobody is selling 7-pin socket savers. As far as I can tell. Dennis Tillman W7PF
-----Original Message-----
Sent: Monday, March 27, 2017 2:23 AM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace https://tubedepot.com/products/9-pin-socket-saver https://tubedepot.com/products/9-pin-socket-saver This place has the 9 pin socket saver and a lot of other things including an 8 pin and converter. Hope this helps! First time posting... Long time learning here. Butch ------------------------------------ Posted by: butchwhitt@yahoo.com ------------------------------------
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Ed,
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That is actually possible to do. The first plug I made was done in a similar way. Your way would result in two at a time. But that still takes a considerable amount of time to do. The 8-pin and 9-pin socket savers are cheap enough that it is worth buying them and cutting them up to save time. Dennis Tillman W7PF
-----Original Message-----
Sent: Sunday, March 26, 2017 11:34 PM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Hey Dennis, this just occurred to me - if you can't find any off-shelf miniature tube style plugs, how about just cutting some pin stock to make them extra long, and jam them into a socket to form a male plug assembly. You should be able to solder the pins to the lugs on this socket, or epoxy it up to keep it together. It would effectively start as a female-female adapter, with the loose pins joining two sockets face to face - one as an alignment jig, and the other to become the plug assembly once the pins are bonded to it somehow. Any base style that has reverse-axial symmetry could have plugs made in this way. Ed ------------------------------------ Posted by: edbreya@yahoo.com ------------------------------------
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Dave,
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I need one or two. I did find a source for 9-pin socket savers. Those can be opened up and the plug part separated from the socket. They are less than $3 so I will buy those. Same for 8-pin octal socket savers. So far I haven't found any 7-pin socket savers still being sold. One was sold on Ebay the other day but my $28 bid was not enough to win it. Dennis Tillman W7PF
-----Original Message-----
Sent: Sunday, March 26, 2017 10:59 PM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Dennis How many of the 7 and 9 pin plugs do you need? Are you looking for a significant number? 73 Dave, ZL3FJ -----Original Message----- Sent: Monday, March 27, 2017 3:46 PM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Hi Bill, In my case I needed tube PLUGS that would plug into a tube SOCKET. That is my problem. I am well aware of Tubesandmore. They certainly have a nice selection of 4 pin, 5 pin, 7 pin, 8 pin , and 9 pin tube SOCKETS. Unfortunately other than 8 pin tube PLUGS they, or anyone else for that matter, do not sell 7 pin miniature tube PLUGS or 9 pin miniature PLUGS. Since 7 pin miniature tubes and 9 pin miniature tubes have their pins coming right out of the glass envelope this will make it very hard to get what I need by smashing spent tubes to try and get an intact set of pins around the base of the tube. As John Gord pointed out one way to find some of these is by searching for socket savers. They, too, are scarce these days. Not many people are designing things with tubes. There was a 9 pin and a 7 pin socket saver auction on Ebay and I bid $28 for them but someone outbid me. I have no way to know how high that person's ultimate bid might have been. Dennis Tillman, W7PF -----Original Message----- Sent: Sunday, March 26, 2017 5:08 PM Subject: Re: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Dennis and all, Has everyone been overlooking the best source for tubes and related hardware? https://www.tubesandmore.com/products/tube_accessories Bill KB3DKS -----Original Message----- From: 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> Sent: Wed, Mar 22, 2017 10:06 am Hi John, Thanks for the suggestion. I know I kept coming across octal socket savers all the time but I never saw a 7 pin or 9 pin socket saver. I will give that a try. Dennis Tillman W7PF -----Original Message----- Sent: Tuesday, March 21, 2017 5:06 PM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Try a Google search for "7 pin socket saver". I got some hits. 9 pin socket savers seem to be more common. It looks like at least some of the socket savers could be disassembled. --John Gord ------------------------------------ Posted by: Doxemf <doxemf@aol.com> ------------------------------------ ------------------------------------ Posted by: "Dennis Tillman" <dennis@ridesoft.com> ------------------------------------ ------------------------------------ Yahoo Groups Links ------------------------------------ Posted by: "Dave Brown" <tractorb@ihug.co.nz> ------------------------------------ ------------------------------------ Yahoo Groups Links
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Re: CORRECTION: Tek 2445 vs Tek 2430A (My bad, originally sent as vs 2435A)
Siggi
On Sun, 26 Mar 2017 at 22:05 Lee Houde houdatto@gmail.com [TekScopes] <
TekScopes@yahoogroups.com> wrote: Hey Lee, I don't have a direct answer to your question, except to say that my 2430 is a pretty limited DSO. The update rate is pretty low, the realtime bandwidth is limited to ~40MHz and the record length is only 1024 samples. The only features the 2430A has over a 2445 are pre-trigger signal viewing, and some measurements (this is very limited on my 2430, I've never used a 2430A). I'd guess that's why the 2430A isn't too popular, it just wasn't a super great scope to begin with. Try looking as something like a video signal or an AM modulated carrier, and I bet you'll run for your 2445s. Siggi
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
n4buq
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Hi Bill,
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
At this point I am not sure if you are looking for a socket or a plug
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but in either case, they make pins and large collet sockets which can be swaged or soldered into printed circuit board material.
On Sun, 26 Mar 2017 21:56:22 -0700, you wrote:
Hi Cheater,
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Re: CORRECTED POST : Tek 2445 vs Tek 2430A (Tek 2435A)
In 1991, the 2445B was $4000 and the 2430A was $8000 from Tektronix
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but it would not surprise me of Tektronix sold more entry level 2430/A DSOs than low bandwidth 2445/A/B analog oscilloscopes leading to the situation today where the 2430/A is more common than the 2445/A/B because at the time, DSOs with automatic measurements were very rare but analog oscilloscopes were common.
On 27 Mar 2017 02:14:30 +0000, you wrote:
I have 3 Tek 2445 scopes and one Tek 2430A scope. While idly bumming around eBay, I noticed that it seemed to me the 2445s were less common and on average more expensive than the 2430As. Seeing as how the 2430A is a DSO and the 2445 is analog I would have expected the opposite. Am I wrong in this thinking or am I missing something?
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Have you considered making your own? 1/8" phenolic or fiberglass epoxy sheet is cheap on Ebay, along with various sizes of round acrylic plastic disks. Thread some brass rod, and tap holes in the insulator of you choice. A nut on the reverse side will keep it secure.
toggle quoted messageShow quoted text
If there is enough interest, I could build a batch of them. I have 7 pin, 9 pin, and other tubes to use as models. I may still have some of the rare 10 in, which is a nine pin plus a single center pin which was used for some mixer applications. Noval and Compactron bases can be made the same way. I will be making some four pin plugs the make connectors for some obsolete batteries this way. The fun part is that the battery has the male pins, with 90VDC on two of the pins so I will add a switch to disable it until the plug is seated into the recessed connector. Here is a scan of an old Amphenol catalog that contains older tube sockets for your reference: http://www.tubebooks.org/file_downloads/Amphenol.pdf
-----Original Message-----
From: "'Dennis Tillman' dennis@ridesoft.com [TekScopes]" <TekScopes@yahoogroups.com> Michael A. Terrell
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
butchwhitt@...
https://tubedepot.com/products/9-pin-socket-saver https://tubedepot.com/products/9-pin-socket-saver
This place has the 9 pin socket saver and a lot of other things including an 8 pin and converter. Hope this helps! First time posting... Long time learning here. Butch
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Re: CORRECTED POST : Tek 2445 vs Tek 2430A (Tek 2435A)
cmjones01
On Mon, Mar 27, 2017 at 4:14 AM, houdatto@gmail.com [TekScopes] <
TekScopes@yahoogroups.com> wrote: I think 2445s were always less common than their big brother, the 2465. I've seen lots and lots of 2465x in my career, including the three I own, but rarely a 2445. 2430 and 2430A DSOs were also fairly common. I suspect the difference in price and availability today is down to demand for what they are. A 2445 is a really good modern analogue scope, and does the things that people want from a good analogue scope, so they fetch high prices and sell quickly. You just can't buy a good new analogue scope any more. A 2430A is a very old DSO and looks pretty poor in many respects compared with the competition from a few years later or from new Chinese scopes. I've got one, and I use it, and it works well for me, and gives me a faint nostalgia for the days when a 2430 was the only DSO available in the lab and I had to ask special permission from the manager to use it, getting it out of a locked cupboard. But would I recommend someone to buy one today? Probably not. Hence why they no longer fetch high prices. Chris
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Ed Breya
Hey Dennis, this just occurred to me - if you can't find any off-shelf miniature tube style plugs, how about just cutting some pin stock to make them extra long, and jam them into a socket to form a male plug assembly. You should be able to solder the pins to the lugs on this socket, or epoxy it up to keep it together.
It would effectively start as a female-female adapter, with the loose pins joining two sockets face to face - one as an alignment jig, and the other to become the plug assembly once the pins are bonded to it somehow. Any base style that has reverse-axial symmetry could have plugs made in this way. Ed
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Dave Brown <tractorb@...>
Dennis
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How many of the 7 and 9 pin plugs do you need? Are you looking for a significant number? 73 Dave, ZL3FJ
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] Sent: Monday, March 27, 2017 3:46 PM To: TekScopes@yahoogroups.com Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Hi Bill, In my case I needed tube PLUGS that would plug into a tube SOCKET. That is my problem. I am well aware of Tubesandmore. They certainly have a nice selection of 4 pin, 5 pin, 7 pin, 8 pin , and 9 pin tube SOCKETS. Unfortunately other than 8 pin tube PLUGS they, or anyone else for that matter, do not sell 7 pin miniature tube PLUGS or 9 pin miniature PLUGS. Since 7 pin miniature tubes and 9 pin miniature tubes have their pins coming right out of the glass envelope this will make it very hard to get what I need by smashing spent tubes to try and get an intact set of pins around the base of the tube. As John Gord pointed out one way to find some of these is by searching for socket savers. They, too, are scarce these days. Not many people are designing things with tubes. There was a 9 pin and a 7 pin socket saver auction on Ebay and I bid $28 for them but someone outbid me. I have no way to know how high that person's ultimate bid might have been. Dennis Tillman, W7PF -----Original Message----- Sent: Sunday, March 26, 2017 5:08 PM Subject: Re: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Dennis and all, Has everyone been overlooking the best source for tubes and related hardware? https://www.tubesandmore.com/products/tube_accessories Bill KB3DKS -----Original Message----- From: 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> Sent: Wed, Mar 22, 2017 10:06 am Hi John, Thanks for the suggestion. I know I kept coming across octal socket savers all the time but I never saw a 7 pin or 9 pin socket saver. I will give that a try. Dennis Tillman W7PF -----Original Message----- Sent: Tuesday, March 21, 2017 5:06 PM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Try a Google search for "7 pin socket saver". I got some hits. 9 pin socket savers seem to be more common. It looks like at least some of the socket savers could be disassembled. --John Gord ------------------------------------ Posted by: Doxemf <doxemf@aol.com> ------------------------------------ ------------------------------------ Posted by: "Dennis Tillman" <dennis@ridesoft.com> ------------------------------------ ------------------------------------ Yahoo Groups Links
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
stuff that disappears does so for a reason. Maybe you just simply
don't get tubes with that base that are any interesting at all. No point trying to accumulate stuff that's boring other than it has a specific pinout. On Mon, Mar 27, 2017 at 6:56 AM, 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Hi Cheater,
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Cheater,
toggle quoted messageShow quoted text
In a pinch I did make a 9 pin plug using 0.040" bus bar pushed into an existing 9 pin socket, with a piece of PVC tubing around it, and I potted the entire thing. What you get is crude, and it takes a fair amount of time to do this. So this is hardly a reasonable solution except in a pinch. I was hoping for something that was much more professional and took far less time. I don't mind paying $10 for a plug that I can order from somewhere. Some of the tube stuff seems to have disappeared, and other stuff seems to be doing just fine. I haven't figured out which stuff is rare that I should jump at them whenever they show up versus the stuff that is still very common and still being produced. I'm new to the whole tube world. Last time I touched a vacuum tube was 40+ years ago until very recently. Dennis Tillman W7PF
-----Original Message-----
Sent: Sunday, March 26, 2017 9:29 PM Subject: Re: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Am I missing something... why not just take a bare FR board and drill some holes in it.. use two boards for rigidity... and pot the whole job? On Mon, Mar 27, 2017 at 5:42 AM, Doxemf doxemf@aol.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Dennis,------------------------------------ Posted by: cheater00 cheater00 <cheater00@gmail.com> ------------------------------------
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Am I missing something... why not just take a bare FR board and drill
some holes in it.. use two boards for rigidity... and pot the whole job? On Mon, Mar 27, 2017 at 5:42 AM, Doxemf doxemf@aol.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Dennis,
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Bill (Doc) Courtright
Dennis,
toggle quoted messageShow quoted text
They have the 9 pin Socket Savers. I did not see any 7 pin. Quite awhile ago there were some cheap car stereo players, maybe eve 8 tracks, I forget, I serviced them once. Anyway, they used a 9 pin male/female connector. I think that the old Calrad or similar brand offered the cable sets. Fair Radio used to have some as well. Someone with a 3D printer could probably spit a bunch out that way. Just have to provide the pins. Bill, KB3DKS
-----Original Message-----
From: 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> To: TekScopes <TekScopes@yahoogroups.com> Sent: Sun, Mar 26, 2017 10:46 pm Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Hi Bill, In my case I needed tube PLUGS that would plug into a tube SOCKET. That is my problem. I am well aware of Tubesandmore. They certainly have a nice selection of 4 pin, 5 pin, 7 pin, 8 pin , and 9 pin tube SOCKETS. Unfortunately other than 8 pin tube PLUGS they, or anyone else for that matter, do not sell 7 pin miniature tube PLUGS or 9 pin miniature PLUGS. Since 7 pin miniature tubes and 9 pin miniature tubes have their pins coming right out of the glass envelope this will make it very hard to get what I need by smashing spent tubes to try and get an intact set of pins around the base of the tube. As John Gord pointed out one way to find some of these is by searching for socket savers. They, too, are scarce these days. Not many people are designing things with tubes. There was a 9 pin and a 7 pin socket saver auction on Ebay and I bid $28 for them but someone outbid me. I have no way to know how high that person's ultimate bid might have been. Dennis Tillman, W7PF -----Original Message----- Sent: Sunday, March 26, 2017 5:08 PM Subject: Re: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Dennis and all, Has everyone been overlooking the best source for tubes and related hardware? https://www.tubesandmore.com/products/tube_accessories Bill KB3DKS
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Re: 7912AD Repair
Bill Higdon
Should have been down not sown
Bill
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Bill,
toggle quoted messageShow quoted text
In my case I needed tube PLUGS that would plug into a tube SOCKET. That is my problem. I am well aware of Tubesandmore. They certainly have a nice selection of 4 pin, 5 pin, 7 pin, 8 pin , and 9 pin tube SOCKETS. Unfortunately other than 8 pin tube PLUGS they, or anyone else for that matter, do not sell 7 pin miniature tube PLUGS or 9 pin miniature PLUGS. Since 7 pin miniature tubes and 9 pin miniature tubes have their pins coming right out of the glass envelope this will make it very hard to get what I need by smashing spent tubes to try and get an intact set of pins around the base of the tube. As John Gord pointed out one way to find some of these is by searching for socket savers. They, too, are scarce these days. Not many people are designing things with tubes. There was a 9 pin and a 7 pin socket saver auction on Ebay and I bid $28 for them but someone outbid me. I have no way to know how high that person's ultimate bid might have been. Dennis Tillman, W7PF
-----Original Message-----
Sent: Sunday, March 26, 2017 5:08 PM Subject: Re: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Dennis and all, Has everyone been overlooking the best source for tubes and related hardware? https://www.tubesandmore.com/products/tube_accessories Bill KB3DKS -----Original Message----- From: 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> Sent: Wed, Mar 22, 2017 10:06 am Hi John, Thanks for the suggestion. I know I kept coming across octal socket savers all the time but I never saw a 7 pin or 9 pin socket saver. I will give that a try. Dennis Tillman W7PF -----Original Message----- Sent: Tuesday, March 21, 2017 5:06 PM Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Try a Google search for "7 pin socket saver". I got some hits. 9 pin socket savers seem to be more common. It looks like at least some of the socket savers could be disassembled. --John Gord ------------------------------------ Posted by: Doxemf <doxemf@aol.com> ------------------------------------
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CORRECTED POST : Tek 2445 vs Tek 2430A (Tek 2435A)
I have 3 Tek 2445 scopes and one Tek 2430A scope. While idly bumming around eBay, I noticed that it seemed to me the 2445s were less common and on average more expensive than the 2430As. Seeing as how the 2430A is a DSO and the 2445 is analog I would have expected the opposite. Am I wrong in this thinking or am I missing something?
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