开云体育

Andrew,

I set each band to FM and measured the power supply current at each
band.
I found that 160M measured 5 amps and 6M measured 20 amps. The current
increased from 160M to 6M in a linear fashion. The external RF power
meter
never shows more than a few milliwatts at any of the bands.

Where should I measure the signal along the hf filter path?

Thank you so much.


On Tue, Jan 21, 2025 at 12:15?PM Andrew Lenton via groups.io <a=
[email protected]> wrote:

Measure the current from the power supply, if 18-20 odd amps then the
power is being generated, but being lost in the RF LPF or certainly

in

that path, if current only 2-3 amps, then the HF pa transistors are

not

been driven!



KR



Andrew



*From:* [email protected] <[email protected]> *On Behalf Of *Tommy

Wooten

via groups.io
*Sent:* 21 January 2025 00:35
*To:* [email protected]
*Subject:* [ic7000] IC7000 no HF Transmit



I purchased an IC7000 with the condition that will not transmit on

all HF

bands. VHF/UHF transmit at the designed power out in all modes.

Receiver

works excellent in all bands all modes. Since VHF/UHF transmit

proves that

the Driver circuit works I have focused on the HF circuit. With a

scope, I

see hf signal through the driver and through the power transistors

Q301 and

Q302. The bias current is set properly. All board traces seem to be
in-tack and pass the signal through to the ANT1 connector when

terminated

with a dummy load, but the signal barely registers on the external

power

meter when the power control is set to 100%.

Any help for further troubleshooting will be greatly appreciated.

Thanks

Tommy KF4RWG