7 ways to cut chirp in a simple QRP transmitter
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- Опубліковано 11 чер 2024
- Have a badly sounding CW transmitter? Consider these tips to remove the chirp.
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Excellent information. I'm venturing into QRP CW as we speak. Cheers
VK5DR
Yi1hxh rafat 73 from baghdad iraq
Good video Peter, I was getting worried that you took towards the end to point out a well regulated power supply.
It would possibly be the most important criteria for stable operation.
I like the chirpy sound. Not all the time but it’s not that common in US. And when I hear it I think, wow a cheap unit getting out and sounding different enough that it draws you in.
Agree. Only a little chirp though. Too much is hard to copy under weak signal conditions.
Thanks Peter, I'm finding this all out! Presently I have a 40m transmit stage that isn't too chirpy but the power drops as I transmit for a longer time? Think it might be the driver for the BD139 transistor. The driver is a 2n3053 in a TO-39 metal case. Might try a heat sink on it? Great video 73 de VK2AOE
Yes, definitely have heatsinks on both transistors.
Send faster?
@@Paul_VK3HNif only I could!!! 😂😂
@@vk3yethanks peter
Why not key the buffer?
Inter electrode capacitance changes with applied voltage. Keying the buffer will alter the VFO frequency causing chirp.
@@FarleyHillBilly What kind of electrode? We're not talking about tubes. Anyway. That makes no sense at all, since the power amplifier needs much more. That's why I suggested keying the buffer and not the final stage.
@@tim46767 Collector to base capacitance. Google ' W1FB Solid State Design for the Radio Amateur ' for a free PDF.