Date   

Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case

 

For jobs like this, I use my largest soldering iron tip for its high
heat capacity. Soldering then takes just a second or two; the large
surface area transfers a lot of heat rapidly and the large heat
capacity means the temperature drop is small so there is no need to
wait for reheating.

The rubber/emery abrasive wheel from a Dremel is perfect for cleaning
the surface before soldering if necessary without scratching the whole
top. I do not know if they are still available but the white erasers
used for ink (the ones that tear up the paper) work well also.

If soldering is still difficult, then a tiny bit of dilute HCl acid
will help a lot but I doubt this will be necessary. Kester actually
makes some acidic surface cleaners (Copper Nu 5520, Nickel Nu 5530)
which work great as fluxes but good luck finding them.

On 28 Mar 2017 06:42:34 +0000, you wrote:

Hi,

I don't think this should be of any problem. The die itself is attached to the bottom of the IC, not the to of the case where you'll solder it. If you are worried, put the IC on some cooling, such as a wet sponge.
To solder the case, first scrape or sand the top and using a lot of flux. Then melt some solder on the case and you can solder the braid. It may sound strange, but use high power (but temperature controlled) iron. This will let you solder it quickly without heating the whole IC.

Szabolcs


Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case

 

The driver hybrid on the 7000 series vertical output amplifiers have a
pressed connection to the top of the metal can package which goes to
ground. It is held in place with a plastic clip instead of being
soldered into place. I am inclined to think Tektronix added these
because they could not rely on the ground connection through the heat
sink interface.

As far as soldering, the top of the metal can package is relatively
far from the circuits mounted to the base of the package so soldering
is relatively easy and safe assuming that the solder wets the surface.


155-0241_01

Aung kyaw Moe <aakmoe@...>
 

Thank you all for advice on my 2456 u800.155-0241-01/-02/-00 are they all the same ?Or do I need faster chip for 2465/2465b?
Thanksmoe mm0mrmSent from Yahoo Mail on Android

[Non-text portions of this message have been removed]


Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case

Szabolcs Szigeti
 

Hi,

I don't think this should be of any problem. The die itself is attached to the bottom of the IC, not the to of the case where you'll solder it. If you are worried, put the IC on some cooling, such as a wet sponge.
To solder the case, first scrape or sand the top and using a lot of flux. Then melt some solder on the case and you can solder the braid. It may sound strange, but use high power (but temperature controlled) iron. This will let you solder it quickly without heating the whole IC.

Szabolcs


Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace

 

Hi Dave,
Thank you for your offer but for the moment I think I have a better
solution. The pins coming out of a tube base are about 1/4" (6.8mm). If I
try to push a longer pin into a tube socket it bottoms out at about 0.28"
(7.25mm). So I'm concerned that the 12mm pin length you have will cause
problems.

I have found a workable solution. Vector still makes pins that are the right
diameter and approximately the right length. They are meant to be pressed
into place in a PC Board through hole and then soldered to the pad
surrounding the hole. Since the vacuum tube curve tracer I was making will
ultimately be built on a printed circuit board I can work out a way to use
the Vector pins I found.

Dennis Tillman W7PF

-----Original Message-----
Sent: Monday, March 27, 2017 3:14 PM
Subject: RE: [TekScopes] Re: A Vacuum Tube Curve Tracer for all Tek
Semiconductor Curve Trace

Dennis
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
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Re: tube sockets and plugs for the new tube curve tracer

 

Hi David,
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

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Posted by: David Holland <david.w.holland@gmail.com>
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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.

I'm picturing a ferrite or powder core toroidal transformer, maybe a couple of inches diameter being about right for the power level.

Ed

[Non-text portions of this message have been removed]



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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,
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,
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
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Posted by: walter2@sphere.bc.ca
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Re: tube sockets and plugs for the new tube curve tracer

 

Hi Cheater,
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,
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
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Posted by: walter2@sphere.bc.ca
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Posted by: "Dennis Tillman" <dennis@ridesoft.com>
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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,
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
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Posted by: "Dennis Tillman" <dennis@ridesoft.com>
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Re: Tek 464 - Advice on soldering shielding mesh to Vertical Output IC case

Fabio Trevisan
 

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>:



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

[Non-text portions of this message have been removed]



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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,
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,
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]"
<TekScopes@yahoogroups.com>
Sent: Mar 26, 2017 10:45 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
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Posted by: cheater00 cheater00 <cheater00@gmail.com>
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Re: A Vacuum Tube Curve Tracer for all Tek Semiconductor Curve Trace

Dave Brown <tractorb@...>
 

Dennis
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
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Posted by: Doxemf <doxemf@aol.com>
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Posted by: "Dennis Tillman" <dennis@ridesoft.com>
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Posted by: "Dave Brown" <tractorb@ihug.co.nz>
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Posted by: "Dennis Tillman" <dennis@ridesoft.com>
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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,
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,
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]"
<TekScopes@yahoogroups.com>
Sent: Mar 26, 2017 10:45 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: "Michael A. Terrell" <mike.terrell@earthlink.net>
------------------------------------



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Posted by: "Dennis Tillman" <dennis@ridesoft.com>
------------------------------------


------------------------------------

Yahoo Groups Links








------------------------------------
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,
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]"
<TekScopes@yahoogroups.com>
Sent: Mar 26, 2017 10:45 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: "Michael A. Terrell" <mike.terrell@earthlink.net>
------------------------------------



------------------------------------
Posted by: "Dennis Tillman" <dennis@ridesoft.com>
------------------------------------


------------------------------------

Yahoo Groups Links



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