"sycochkn" wrote in message
m...

"ian field" wrote in message
...

"J.P." wrote in message
...
On Thu, 17 Apr 2008 15:34:54 GMT, "ian field"
wrote:

While sorting some boxes of old junk I found a resealable plastic bag
full
of tiny paper envelopes, a couple of which had Tektronix brand labels.

One envelope was marked: Tektronix 152-0177-00 Germanium tunnel diode,
the
others we 152-0434-00 and 152-0465-00

Anyone know if its possible to find info on these parts? I've tried
putting
"152-0177-00" into google, there was only 2 pages of hits and no data
that I
could find.

TIA.

Check with the Yahoo scope groups..bet the Tek bunch can tell ya and
might even buy them from ya..

A quick look in the envelopes reveals that they appear to be pulls from
old equipment so I can't guarantee they're any good, assuming they are
any good I have a 465 which uses a couple of tunnel diodes so it seems
sensible to hang on to them.

If I decided I could use one and only keep one spare, I've been trying to
get around to building a dip meter for ages - obviously a tunnel diode
dipper is now possible.


I once built a tunnel diode beat frequency metal detector. The major
problem with it was that when the frequencies got real close to each other
the oscillators would injection lock to each other.

Bob

That could happen to any 2 oscillators with similar frequencies unless
output buffering is used, one of the uses for a TD is a threshold detector
so they're practically made to lock together.