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

 

[Tom Woodrow]

I think the mfg was E.F. Johnson.

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

Tom Woodrow

 

[John Woodgate]

I read in sci.electronics.design that Tom Woodrow

I think the mfg was E.F. Johnson.

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

Tom Woodrow

UK source, teflon or what you want, very high quality:

http://www.oxley.co.uk/interconnect/

 

[John Fields]

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 Larkin]

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]

I think the mfg was E.F. Johnson.

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

Tom Woodrow

"Sealectro" (sp?) was another.

 

[Robert Baer]

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

 

[John Popelish]

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].