In message , gareth
writes
I wonder if any have experimented with magnets hovering over
reed relays to act as the contacts of a Morse Key, possibly on
the vibrating arm of a bug key?

The reason i ask is the difficulty of excising noise on the dot contact
of the bug key I made a couple of years ago.



Hall effect switches will be better.


Brian
--
Brian Howie

Brian Howie wrote:


Hall effect switches will be better.

Good idea, if the problem is dirt etc. on the contacts.

If it is caused by poor machining, them it won't help.

Poor machining can cause contact, or parts initiating contact, to 'wobble'
rather than make / break cleanly and stay firmly made. You get a similar
effect in laser based sensors which use mirrors to form a closed path, eg a
ring laser gyro. There you are not closing a contact, you measure something
else, but if the mirrors can move......

"Brian Reay" wrote in message
...

If it is caused by poor machining, them it won't help.


If I didn't know you and your habitual infantile sneering so well,
I might have thought that you were trying to be helpful.

Grow up, Man.

"Brian Howie" wrote in message
...
In message , gareth
writes
I wonder if any have experimented with magnets hovering over
reed relays to act as the contacts of a Morse Key, possibly on
the vibrating arm of a bug key?
The reason i ask is the difficulty of excising noise on the dot contact
of the bug key I made a couple of years ago.

Hall effect switches will be better.


reed swich is simple on-off, and applicable to any TX.