|
Re: tube sockets and plugs for the new tube curve tracer
Hi David,
toggle quoted messageShow quoted text
He has a 7-pin socket saver listed for $25. You are right about him not being cheap. Thanks for the link. Dennis Tillman W7PF
-----Original Message-----
Sent: Monday, March 27, 2017 5:04 PM Subject: Re: [TekScopes] tube sockets and plugs for the new tube curve tracer I wouldn't call it a proper "source", but the last 7-pin socket saver I got was from Jim Cross @ http://vacuumtubesinc.com I had to send him a note specifically for it, and he scrounged a reasonable one up out of hits back room. They've currently got a couple listed, but they aren't cheap. His email is jim@vacuumtubesinc.com (No affiliation, satisfied customer, yada-yada-yada) David ------------------------------------ Posted by: David Holland <david.w.holland@gmail.com> ------------------------------------
|
|
|
|
Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case
Vladimir _
Hi Fabio,
I have two 466s, an early and a late model, and both have the grounding strap soldered to the output amp if I remember correctly. However, I doubt it really matters as the hybrid has a low-impedance path to ground through the bolt on the bottom anyway. I personally wouldn't risk damaging the replacement unless absolutely necessary.
|
|
|
|
Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case
I have an early 464 manual that shows a braid on the VOA, just across the device. I have two 466 manuals, one earlier and one later that also show the 464's(!) VOA. Neither shows a strap/braid.
Raymond
|
|
|
|
Re: OT: FET matching
Maybe use one of those modern CPU heatsinks, like this?
http://www.legitreviews.com/images/reviews/1303/rolimatech-Armageddon-Front2.jpg This one's respectable: http://noctua.at/en/nh-d15.html those can take a lot of heat... Where can I read more about your battery rejuvenation system? It sounds very interesting. I'd love to use something like this for some older batteries I have. On Mon, Mar 27, 2017 at 9:14 PM, edbreya@yahoo.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Yet another thing - if the lead inductance can't be reduced, and it represents a relatively large power loss to dispose of, maybe consider making the snubber into a recycler, such that most of the energy in each cycle is returned to the source rather than dissipated. This would of course require extra components like a small transformer and rectifiers. If you can arrange it so the kickback (but none the forward) current goes through the transformer, you can step it up to the main cap voltage and dump some charge back into it, increasing overall efficiency and reducing the heat load in the guts.
|
|
|
|
Re: tube sockets and plugs for the new tube curve tracer
David Holland
I wouldn't call it a proper "source", but the last 7-pin socket saver
I got was from Jim Cross @ http://vacuumtubesinc.com I had to send him a note specifically for it, and he scrounged a reasonable one up out of hits back room. They've currently got a couple listed, but they aren't cheap. His email is jim@vacuumtubesinc.com (No affiliation, satisfied customer, yada-yada-yada) David
|
|
|
|
Re: tube sockets and plugs for the new tube curve tracer
Sure, I'm just wondering if that's the right dimensions. I was
thinking, maybe you should just take a female 7 pin DIN plug, and put some wire in instead of the female contacts, and bend them out to fit a 7 pin tube socket? That's like a 10 min job. You could use the round plastic part from multiple din sockets for added stability. That's not a huge job. On Tue, Mar 28, 2017 at 1:39 AM, 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Hi Cheater,
|
|
|
|
Re: tube sockets and plugs for the new tube curve tracer
Hi Cheater,
toggle quoted messageShow quoted text
This is a socket (and an expensive one at that). This is the female part of what I am looking for. I'm looking for the plug that goes into this socket (the male part). Dennis Tillman W7PF
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] Sent: Monday, March 27, 2017 3:57 PM To: TekScopes <TekScopes@yahoogroups.com> Subject: Re: [TekScopes] tube sockets and plugs for the new tube curve tracer Hi Dennis, is this the kind? http://www.thetubestore.com/Parts-Accessories/7-Pin-Sockets/7-Pin-Teflon-Gold-Pin-Tube-Socket On Mon, Mar 27, 2017 at 8:53 PM, 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Hi Walter, ------------------------------------ Posted by: cheater00 cheater00 <cheater00@gmail.com> ------------------------------------ ------------------------------------ Yahoo Groups Links
|
|
|
|
Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case
Hi Fabio,
A braid as on the picture is exactly what I thought you meant but I used the wrong word. Just checked 3(!) 465's, no braid! Maybe someone on this forum knows more. The braid may have been there to decrease HF noise but it certainly won't harm running your 'scope without it, see the result and temporarily press the braid against the VOA's case for comparison. Raymond
|
|
|
|
Re: tube sockets and plugs for the new tube curve tracer
Hi Dennis,
is this the kind? http://www.thetubestore.com/Parts-Accessories/7-Pin-Sockets/7-Pin-Teflon-Gold-Pin-Tube-Socket On Mon, Mar 27, 2017 at 8:53 PM, 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Hi Walter,
|
|
|
|
Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case
Thanks Raymond,
It's not really a tab, I didn't use well the word shielding..., it's a copper braid, that connects to the mumetal shielding of the CRT. Q service has one vertical amplifier output board for sale that has a picture of the board that shows it... You can see at the link below... http://www.qservice.tv/vpasp/shopexd.asp?id=8914 I thought that this was the "normal" way, as I've seen more than one picture of this board on the net, and the copper braid is always there. Rgrds, Fabio 2017-03-27 19:02 GMT-03:00 hewpatek@gmail.com [TekScopes] < TekScopes@yahoogroups.com>:
[Non-text portions of this message have been removed]
|
|
|
|
Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Dennis,
fully aware of this. Just wanted to call it and spare you any more time lost on this endeavour. I want you to have more time so you can make other cool stuff :) On Mon, Mar 27, 2017 at 11:51 PM, 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> wrote: Hi Cheater,
|
|
|
|
Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Dave Brown <tractorb@...>
Dennis
toggle quoted messageShow quoted text
I have several new 9 pin plug bases here which you are welcome to- these are in essence a plastic base with the pins projecting from both sides of the plastic and were originally used pcb mounted to make a test access (multi) point in early Tait radios - the pins project equally each side of the plastic base roughly 12 mm or so- I've not measured it. Can dig one out and take a picture if you're interested. DaveB, Christchurch, NZ
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] Sent: Tuesday, March 28, 2017 4:16 AM To: TekScopes@yahoogroups.com Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Hi Dave, 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 ------------------------------------ Posted by: "Dennis Tillman" <dennis@ridesoft.com> ------------------------------------ ------------------------------------ Yahoo Groups Links
|
|
|
|
Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case
None of my IC-VOA-equipped 465's has a tab soldered to its housing! At least try without it first!
The bolt underneath the IC is screwed into the chassis and takes care of grounding AFAIK. The circuit at the other side of your tab (no idea where it leads) may need grounding. If necessary, try and find another way of grounding before soldering. Raymond
|
|
|
|
Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Cheater,
toggle quoted messageShow quoted text
I didn't know that when I started looking for tube plugs. Now it is pretty obvious that making them myself is my only choice. My thanks to everyone who made suggestions along the way. Dennis Tillman W7PF
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] Sent: Monday, March 27, 2017 2:07 PM To: TekScopes@yahoogroups.com Subject: Re: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Hi Dennis, You've spent more time searching for those bases just on this list than it takes to make one. If anyone else needs any (VERY unlikely imo....) they can make some themselves or if many people need it they'll find a source for sure. Do the pragmatic thing and make bases yourself. On Mon, 27 Mar 2017 17:35 'Dennis Tillman' dennis@ridesoft.com [TekScopes], <TekScopes@yahoogroups.com> wrote: Hi Michael,you choice. A nut on the reverse side will keep it secure.way. might have been. ------------------------------------ ------------------------------------ Posted by: cheater00 cheater00 <cheater00@gmail.com> ------------------------------------ ------------------------------------ Yahoo Groups Links
|
|
|
|
Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Dennis,
You've spent more time searching for those bases just on this list than it takes to make one. If anyone else needs any (VERY unlikely imo....) they can make some themselves or if many people need it they'll find a source for sure. Do the pragmatic thing and make bases yourself. On Mon, 27 Mar 2017 17:35 'Dennis Tillman' dennis@ridesoft.com [TekScopes], <TekScopes@yahoogroups.com> wrote: Hi Michael,
|
|
|
|
Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case
Hello Guys,
A couple of weeks ago, with the help of this forum, I came to conclude that my 464's vertical output amplifier IC was defective (U464... part# 155-0115-00.) I just got a new one and I`m about to install it the following days. I`m usually confident in regards to soldering and normally I don't give it second thoughts... but this IC takes a relatively "heavy" shielding mesh to be soldered to its case... and I`m a bit shaky. Do you have some advice? Will it help to screw the IC to a heatsink so, at least its base and I suppose its die will take longer to heat? (I think I'll do it anyway, just in case). Thanks for any tip? BRgrds, Fabio
|
|
|
|
Re: OT: FET matching
Ed Breya
Yet another thing - if the lead inductance can't be reduced, and it represents a relatively large power loss to dispose of, maybe consider making the snubber into a recycler, such that most of the energy in each cycle is returned to the source rather than dissipated. This would of course require extra components like a small transformer and rectifiers. If you can arrange it so the kickback (but none the forward) current goes through the transformer, you can step it up to the main cap voltage and dump some charge back into it, increasing overall efficiency and reducing the heat load in the guts.
I'm picturing a ferrite or powder core toroidal transformer, maybe a couple of inches diameter being about right for the power level. Ed
|
|
|
|
Re: tube sockets and plugs for the new tube curve tracer
Hi Walter,
toggle quoted messageShow quoted text
I looked through the Eby web site and found no plugs of any kind. They do have lots of sockets for tubes as well as for some transistors. Dennis Tillman W7PF
-----Original Message-----
Sent: Monday, March 27, 2017 11:37 AM Subject: [TekScopes] tube sockets and plugs for the new tube curve tracer Eby still makes all kinds of tube sockets AND plugs, and they do make custom ones, have a look here: http://www.ebycompany.com/sockets.shtml http://www.ebycompany.com/sockets.shtml also, for interfacing to tube testers, an octal plug works, which you can scavenge from many unwanted octal tubes easily. hickock and others used this technique themselves to tie to things like compactron adaptors, etc. . it does require slightly altered pin settings to get to multi-element tubes, but that is not a big deal, and is exactly what they did. you can also easily MAKE a nice 7/9 tube plug simply by using stock loose male connector pins from d-sub connectors, or ms-connector pins, and a simple little round board to support them. it can also sport a little tab or center hole/stand-off to hold down a cable strain relief. finally, an even better plan, may be to simply make a pendant cable tied to the inside tube tester wiring, brought out to a 9 pin d-sub connector for easy interfacing. all the best, walter ------------------------------------ Posted by: walter2@sphere.bc.ca ------------------------------------
|
|
|
|
tube sockets and plugs for the new tube curve tracer
Eby still makes all kinds of tube sockets AND plugs, and they do make custom ones, have a look here:
http://www.ebycompany.com/sockets.shtml http://www.ebycompany.com/sockets.shtml also, for interfacing to tube testers, an octal plug works, which you can scavenge from many unwanted octal tubes easily. hickock and others used this technique themselves to tie to things like compactron adaptors, etc. . it does require slightly altered pin settings to get to multi-element tubes, but that is not a big deal, and is exactly what they did. you can also easily MAKE a nice 7/9 tube plug simply by using stock loose male connector pins from d-sub connectors, or ms-connector pins, and a simple little round board to support them. it can also sport a little tab or center hole/stand-off to hold down a cable strain relief. finally, an even better plan, may be to simply make a pendant cable tied to the inside tube tester wiring, brought out to a 9 pin d-sub connector for easy interfacing. all the best, walter
|
|
|
|
Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace
Hi Bruce,
toggle quoted messageShow quoted text
Vector still makes pins of the right diameter and length (Vector part number: K24C/C) that I could press into a PC Board and make a plug that way, but nobody seems to have these pins in stock. Dennis Tillman W7PF
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] Sent: Monday, March 27, 2017 8:38 AM To: TekScopes@yahoogroups.com Subject: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace Vector used to sell little extruded round aluminum cans with 7-pin and 9-pin tube pin bases. The bases attached with side screws. These were used for constructing special plug-in modules. I don't know if they are still in the Vector product line. Bruce, KG6OJI ------------------------------------ Posted by: brucekareen@aol.com ------------------------------------
|
|
|
