Jim Adney wrote in
:

On 23 Dec 2004 17:46:37 GMT Jim Yanik . wrote:

Both 465 and 485 use the same HF cam switch contacts.

Okay, glad to hear it. That's what I'd always assumed. I assume this
is true across the whole family: 464, 465, 465B, 465M, 466, 475, 475A,
& 485.

TEK used to have a repair kit that included both contacts,drill bits to
remove the securing rivets,and tiny nuts and bolts to secure the new
contacts.

Now I'm getting confused. What is HF in this context? I don't remember
seeing rivets....

High Frequency cam switches,the ones used in the attenuators.Different from
the LF contacts used in the timing switch area.The HF contacts have a
plastic piece insulating the actual goldplated contact from the spring arm.
LF contacts are one piece spring phosphor-bronze.


They also had a repair kit for the LF contacts used in the timing
switch,with an alignment guide to get them straight.

I have one of these kits, and had assumed that it fixed ALL the cam
switches. I've never needed it, but it was reassuring to know that it
was there. But LF only? Suddenly I'm feeling less reassured....

Both are no longer available.

Where are the LF contacts used vs the HF contacts?

The timing switch.

--
Jim Yanik
jyanik-at-kua.net