I spent the whole day trying to figure out why power was low and the the bandpass filter wouldn't peak more than 2 on my QCX. I found 1 turn too many on secondary #1 of T1 and fixed that. I took 5 turns off of secondary #3 of T1. C1 ended up 50% meshed and the peak is right in the edge of being 3 now. I tested the caps in the bandpass filter. They were all fine.?
One test was wonky. Page 127 says:
"Check the RF power wire touched to the BS170 drains first (see diagram). You can still touch the wire to these BS170 drains from he top side of the board. Key-down and check the wattage reading"
I didn't have to key down. The internal wattmeter reads 5.2 watts on each drain leg (per the diagram on the same page). Keyed down or up I see 5.2W. I know the wattage isn't accurate but why is it there all the time? Something must be turned on in the keying circuit.
Here's a pic. You can't see where I'm holding the probe. You'll just have to take my word for it, Pin 1 of the MOSFET... aka Drain. It does this for all three...
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73
NE5U
Mike
