[HomeBrew] VEC-201K CW Keyer Kit

[Loren Moline WA7SKT]

Hello Friends,

Quite a while back I bought a Vectronics VEC-201K CW Keyer Kit and after I 
built it I had some problems so did some troubleshooting, replaced the keyer 
chip, and problem was still there.

Here is whats going on. When you power up the keyer everything works fine 
and after a short time the sidetone dies but the keyed line still works. If 
you power down and back up...sidetone works again for short time and then 
dies. Today I also discovered that when the sidetone dies the changed 
parametes in the program go back to default but the keyed line still works.

All voltages on thec chip are the same even after this sidfetoine fails. The 
keyer chip is a PIC12C671 and it is being operated at a regulated 5 volts. 
Because the replacement chip did the same as the original I believe it must 
be a program glitch or something.

Has anyone else ever built this keyer and had the same problem?

Thanks!
Loren



If I do not dream then it can't come true!
Loren Moline WA7SKT  CN86cx
Member: ARRL, Pacific Northwest VHF Society #151