On Fri, Mar 27, 2020 at 06:46 AM, Rene wrote:
Hello again,
Hi too,
That is good you are on a capable power supply so we don't need to worry about that.
did some measurings with mulimeter.
The radio pulls when receiving on 14.250 mhz, about 280 to 300 mA, when TX its jumping from 850 to 1100 mA by 13.8 volts,
On the 20m band, mine requires around 1.7A on CW (I still need to measure SSB) for 5.4W out.? Your current readings actually seem low for making 10W out.
the strange thing is when i push the ptt and make no noise the radio pulls still 800 mAso without modulation. Think also that is not correct???
I think this is correct as when PTT is pushed the bias currents will start on the two final transistors -- maybe 250mA each is about where they set them.
So on the dummy, the midland Hi Qline says me about 10 watts output.
That sounds good also -- mine only does 5.4W on 20m CW.? When just pushing PTT only (no microphone input) does the power meter read 10 watts also?
But still that toon on my transmit frequentie and bad modulation.
I tryed to make a record of the peeeeeeeeeeep.
That sounds bad.? To my ears, the peeeeep is not microphone feed back as it is too constant in sound.? The voice quality is very bad as you say.
So i am doing some experiments with mike's but the audio is realy bad from the baofeng
I would confirm that the leads are correct on the microphone.? Check continuity and resistance of the shield connection of the 3.5mm plug to the negative terminal of the electret microphone element.? And check the same for the tip connection on the jack to the positive terminal of the microphone element.
regards,
Rene
Regards too.? I don't know what else to check!
Mark
