cockpitbob
NES Member
I never paid much attention to the current meter on my 12V supply running my FT-857 until now. I think for everything but FM my FT-857 is a QRP rig. I'm hoping one of you gurus can tell me if I need to send it in for service.
I just got done with a series of tests into a dummy load with o-scope and into a different dummy load with cross-needle meter. They both tell the same story.
Tx set to 7.1MHz, 40W:
* FM - carrier power = 43W. (all OK).
* CW - carrier power = 3.5W (should be 40W, shouldn't it?)
* LSB - pk envelope pwr = 3.5W yelling into the mic
* AM - carrier power = 0.2W with close to 100% modulation yelling into the mic. (manual says factory set to 25W)
For SSB I've tried setting the mic gain to 100% and the AF speech processor to 100%. I can't get more than 3.5W pk with the Tx pwr set to 40W. When I set the meter to monitor the ALC (auto level control) the meter shows zero level control no matter how much I yell at the mic.
I've been through all the settings twice. I even did full CPU reset.
So, do I send it in for service? Where, Yaesu or somewhere else?
Thanks,
Bob
I just got done with a series of tests into a dummy load with o-scope and into a different dummy load with cross-needle meter. They both tell the same story.
Tx set to 7.1MHz, 40W:
* FM - carrier power = 43W. (all OK).
* CW - carrier power = 3.5W (should be 40W, shouldn't it?)
* LSB - pk envelope pwr = 3.5W yelling into the mic
* AM - carrier power = 0.2W with close to 100% modulation yelling into the mic. (manual says factory set to 25W)
For SSB I've tried setting the mic gain to 100% and the AF speech processor to 100%. I can't get more than 3.5W pk with the Tx pwr set to 40W. When I set the meter to monitor the ALC (auto level control) the meter shows zero level control no matter how much I yell at the mic.
I've been through all the settings twice. I even did full CPU reset.
So, do I send it in for service? Where, Yaesu or somewhere else?
Thanks,
Bob