03-04-2014, 11:28 PM
OK... I have determined I'm receiving short wave on the broadcast band instead of regular broadcast stations! An Asian station, a Latino station, Religious station... everything but local stations. One said they were at 5985 on the dial. I get still get stations on both ends of the dial... from 600 to about 800, and then 1100 to 1400, with squeal & motorboating in between 900 to 1100.
To backtrack... Sky, I'm using an 8200 ohm resistor in the 36 cathode bias network.
Mondial: When I take the grid cap off of the 44 RF tube and put it on the 36 tube, I received a few more stations. But again, they are shortwave not local stations. Dead in the middle of the dial...just the squawking.
With the #44 RF tube out completely, and the grid cap from the 36 tube on the 36 tube where it belongs (meaning the 44 tube is out, and its grid cap unused), I get nothing but buzzing on the dial. Even with a gator wife from the antenna terminal to the grid cap of the 36.
Now as I said, I used 32 gauge wire for rewinding the primary on the RF coil, as I didn't have 34 gauge here. But the number of turns and direction is correct. Does that small difference in wire gauge make a big difference? Should I get some 34 gauge and redo it?
Here is a pic of the bottom of my chassis. It was a total mess when I got it... there was hardly anything connected where it should be and so many extra components added I had to literally go wire by wire on the schematic to trace it out. The schematic I'm going off of is also below. I'm at a loss as to how to get rid of the shortwave and get local stations on the dial. If there was a pulling one's hair out icon I'd post it here!
To backtrack... Sky, I'm using an 8200 ohm resistor in the 36 cathode bias network.
Mondial: When I take the grid cap off of the 44 RF tube and put it on the 36 tube, I received a few more stations. But again, they are shortwave not local stations. Dead in the middle of the dial...just the squawking.
With the #44 RF tube out completely, and the grid cap from the 36 tube on the 36 tube where it belongs (meaning the 44 tube is out, and its grid cap unused), I get nothing but buzzing on the dial. Even with a gator wife from the antenna terminal to the grid cap of the 36.
Now as I said, I used 32 gauge wire for rewinding the primary on the RF coil, as I didn't have 34 gauge here. But the number of turns and direction is correct. Does that small difference in wire gauge make a big difference? Should I get some 34 gauge and redo it?
Here is a pic of the bottom of my chassis. It was a total mess when I got it... there was hardly anything connected where it should be and so many extra components added I had to literally go wire by wire on the schematic to trace it out. The schematic I'm going off of is also below. I'm at a loss as to how to get rid of the shortwave and get local stations on the dial. If there was a pulling one's hair out icon I'd post it here!
Greg V.
West Bend, WI
Member WARCI.org