All Questions
Tagged with cw transmitter
6 questions
1
vote
2
answers
74
views
Will a LPF filter on the transmitter prevent CW key clicks?
Reading about key clicks, it would seem that they are primarily caused by the fact that the square wave of turning the key on and off must, by definition, have higher frequency harmonics, which sound ...
- 301
0
votes
1
answer
101
views
FT450D no cw tx unless ppt is held
FT450D in cw mode does not transmit unless PTT is actuated. "BK-IN" not in display despite pressing function followed by vox/store button.
2
votes
2
answers
1k
views
How does keying a CW transmitter work?
In my handbook it talks about keying the transmitter to produce the dots and dashes. Does this mean that the operator is turning the transmitter on and off, or does this mean that the key is turning ...
4
votes
1
answer
550
views
Will I get cleaner keying by keying the oscillator, or interrupting the amplifier B+?
One of my goals as a new ham is to homebrew my own transmitter (using vacuum tubes, aka valves). Initially I'll stick with CW for the transmitter, though over time I might build an AM modulator or ...
- 4,145
3
votes
1
answer
817
views
Audio Morse Code to CW converter?
What kind of circuit can be constructed and/or could be used to convert audio containing Morse Code sounds (say from an old practice tape, or from computer generated audio) into key, switch or relay ...
- 13.6k
6
votes
2
answers
4k
views
Preventing CW key clicks
What are "key clicks"? How much does the rise time or bandwidth of a CW signal need to be limited to prevent other QSOs on adjacent frequencies from being annoyed by "key clicks"? Is there a legal ...
- 13.6k