I have tried all kinds of debouncing circuits, but the one that has
always worked best is simply a 12v reed relay with a 10uf capacitor
across its coil -- not across the contacts!
I used an SPST reed relay I got at the now-defunct Radio Shack, but
there are many such relays that are suitable. Reed relays are fast
enough to follow the contact bounce of the bug, hence the 10uf across
the coil.
This works fine with a 9v battery or from your usual 12v station PS.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 28/04/2019 20:11, John Oppenheimer wrote:
Nice!! A Begali Intrepid,
All bugs will have contact bounce. K3 does not handle them well at all,
same for KX3/2. K2 is much more tolerant. Though normally for the dot side.
I fixed it with a home-brew debouncer:
https://www.kn5l.net/debounce555/
Others cam be found on the WWW. It was fun designing and building one.
John KN5L
On 4/28/19 12:02 PM, TJ Campie wrote:
I hooked up a new bug (begali intrepid) and am noticing popping when keying
dahs - I if I add a 4.7uF bypass across the key line it clears this up but
it???ll sometimes make it so there???s no dits. I can???t figure this one out -
is there something I need to do to make sure there???s no extra garbage when
I???m keying? (Contacts are clean)
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