On 16/11/2017 17:07, rickman wrote:
Bob Wilson wrote on 11/7/2017 9:47 PM:
On 11/4/2017 5:42 AM, Gareth's Kitchen Komputer wrote:
On Mon, 21 Dec 2015 23:33:17 +0000, gareth wrote:

For those who make their own Morse Keys, what do you use for the
contacts,
for
I have found the phosphor bronze pillar for the dot contact on my
ersatz
Vibroplex
to be very noisy and scratchy?

I'm fairly sure that I asked this question before, but it has been a
habit
of never put off till
tomorrow what you can put off till the day after.

I chose phosphor bronze because in the days of making one's own
electronic
organs, phosphor bronze was suggested as a suitable keying matreial
for the
keyboards.






If a question's worth asking, Gareth...







I have not made lots of keys, but when I do I use contacts from old
relays.
I still have some relays I bought as WWII surplus when I was in my teens,
back in the 1950's. They have strange coil parameters, weird mounting
arrangements, etc., but nice little silver contacts.
Bob W, WA9D

Why use a mechanical switch?Â* There are magnetic hall effect switches
around.Â* Or a mercury wetted switch can be operated by a magnet.Â* Are
the magnetic switches too sloppy?


Perhaps you confuse mercury wetted with reed relays?