Teflon standoffs?

[Jim Miller]

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

thanks

jtm

 

[John Fields]

On Sun, 26 Sep 2004 13:42:36 -0400, "Jim Miller"
<jim@removethisjtmiller.com> wrote:

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

---
go to

http://www.concord-elex.com/

and search for terminals,PTFE

--
John Fields

 

[John Larkin]

On Sun, 26 Sep 2004 13:42:36 -0400, "Jim Miller"
<jim@removethisjtmiller.com> wrote:

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

thanks

jtm

Cambion still makes things like that, I think. But the best standoff
is none... just make a mid-air solder splice of all the critical
things.

John

 

[Robert Baer]

Tom Woodrow wrote:

I think the mfg was E.F. Johnson.

We used these at Siliconix for test fixtures (early 70's)

Tom Woodrow

Jim Miller wrote:

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

thanks

jtm

"Sealectro" (sp?) was another.

 

[Robert Baer]

John Larkin wrote:

On Sun, 26 Sep 2004 13:42:36 -0400, "Jim Miller"
jim@removethisjtmiller.com> wrote:

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

thanks

jtm


Cambion still makes things like that, I think. But the best standoff
is none... just make a mid-air solder splice of all the critical
things.

John

...the advantage is ther is *no* triboelectric effects to make
bothersome problems.

 

[Sporkman]

Another source is Fastex (ITW company).
http://www.itw-fastex.com/electronics-fasteners.html
I think their standoffs are nylon, however.

Mark 'Sporky' Stapleton
Watermark Design, LLC
www.h2omarkdesign.com

Jim Miller wrote:

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

thanks

jtm

 

[John Popelish]

Jim Miller wrote:

In the early 70's we used to prototype using teflon standoffs pressed into
copperclad board. They were called chessmen in the vernacular then.

Are they still available today? Have they been supplanted by other
insulating materials such as polypropylene?

Any sources would be appreciated. This will be for a highimpedence summing
junction support.

thanks

jtm

Try searching for the key words [teflon turret terminal].
--
John Popelish