Re: Problems, now that the radio is completed
Charles W. Powell
Answers below. This also addresses some of the follow-up questions, so in the interests of not flooding the list, I think Will and Wayne can glean answers from my comments.
It was 14061.61, so within range. I don’t know what I did to make it work; I simply “tried again” and I made sure I left the power on for about a minute after I was happy with the frequency. When I powered up again, it was darn close to 14060.
I was not able to get the BFO to match the sidetone frequency, but after I got the LO to the right transmit frequency, the BFO centered on a 600 Hz tone. This suits me because I find an 800 Hz tone “shrill” and fatiguing. So I will put up with the side tone being a high pitch. Hams are generally pretty terrible about zero beating anyway. I can always use RIT to make it comfortable but nonetheless, if they hit spot on it will be 600 Hz. I’m good with that. For some reason, the passband is fine at 600, way down at 700, then comes back up at 800 Hz according to my tests “by ear."
I should be able to determine how well it works when I take it to the field today. Nice day here. I’ll see what happens with a signal that isn’t 3” from the radio.
I took the power down to 1/2 watt on the KX2 I was using for testing. It did not overload or oscillate with the lower power and the KX2 transmitting into a dummy load. That tells me that the radio is quite sensitive. When I get home I will run some tests to see exactly where it starts to “hear."
Well, the unit I have most assuredly is Curtis mode A. If there is a way to change it, PLEASE tell me. I truly cannot send with mode A. I’ve been using mode B for 35 years and old habits die hard. If there is an update to the firmware that will allow mode B (or make it the default) I will be a happy camper.
I will have to make myself a short adapter for this. I can force it to start in SK mode by holding the dash paddle, then changing out the key.
Good to know about the PA. I also won’t worry if the SWR isn’t spot on. I often use a 1/4 wave vertical, but the ground side is usually pretty random - a few wires on the ground, dangling from a picnic table. Should be fine in that case.
I will report back after I get out this afternoon.