03-14-2021, 03:43 PM
Hi , I have been working on this for a while. I have replaced the secondary I F , rewound the primary on the oscillator twice I went the wrong way the first time . 18 wines of 39 ga. Did the small coil on the antenna coil (.7) .
On the schematic on the oscillator (item 13) 110 pf cap I found a mica mold cap rated at 60 pf in that place. ( blue, brown, yellow). I measured it out of circuit with a lcr meter it read 57 pf . I did install the 110 pf silver mica. Everything was going well in the alignment until I went to adjust the 600 padder . I found that up at 700. I tried rocking and dragging it down to 600 that did not work. Peaked strong at 700.
I put the 60 pf back in and did it all again. This time the wave trap did not work at all couldn’t tune it down like I did the first time. Tuned in 1400 with the oscillator and the antenna padder on the tuning condenser . Better with the 110pf. Found 600 at 700 again. Just as strong as before. Oh, by the way the 60pf cap is mica. (cut it open ) . I put 110pf back in . Tried another 6a7 same thing.
Police band works. The tracking is off also .
Any ideas?
Thanks. Dean
On the schematic on the oscillator (item 13) 110 pf cap I found a mica mold cap rated at 60 pf in that place. ( blue, brown, yellow). I measured it out of circuit with a lcr meter it read 57 pf . I did install the 110 pf silver mica. Everything was going well in the alignment until I went to adjust the 600 padder . I found that up at 700. I tried rocking and dragging it down to 600 that did not work. Peaked strong at 700.
I put the 60 pf back in and did it all again. This time the wave trap did not work at all couldn’t tune it down like I did the first time. Tuned in 1400 with the oscillator and the antenna padder on the tuning condenser . Better with the 110pf. Found 600 at 700 again. Just as strong as before. Oh, by the way the 60pf cap is mica. (cut it open ) . I put 110pf back in . Tried another 6a7 same thing.
Police band works. The tracking is off also .
Any ideas?
Thanks. Dean
