Peter are you speaking loudly
The energy in an fm envelope is way larger than a side band transmission
The fact that your reaching an alc level seems to indicate the radio is doing its job
Pity u don't have USB rx
Do you have a software defined radios ?
Andrew
Sent from my iPhone
On 11 Aug 2017, at 10:02 pm, Peter Pauly [email protected] wrote:
I bought a used IC-910H on ebay for satellite work an am having a possible issue with it.
I tested the 2m and 70cm transmitter and receiver in FM mode with my handheld and they work fine. I hooked up a Bird 43 wattmeter with a 50E slug (50W, 400-1000Mhz) and when I transmit on 440Mhz FM I get an indication of power output on the meter. So far so good...
Then in USB/LSB mode however, I get no indication on the meter, despite turning the mic gain up and talking into the mic. I've also up'ed the RF power with the little knob and that doesn't help. The red light flashes on the rig (ALC indication) and the meter on the rig moves. I can also hear distorted audio on my FM handheld (as expected since it's FM and not USB) but I'm worried about the lack of power indicated on the Bird. I haven't been able to try CW yet because I don't have the right sized plug. Should I be concerned about the lack of power?
Summary: Bird wattmeter shows power out on FM, but not on USB/LSB.
Thanks
Peter W9KG _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb