03-01-2025, 08:48 PM
So...
4 out of 5 resistors in the resistor section were too much off, so I had to fix it.
I opened up the caps, removed the rod, and then parallelled the proper value resistor to them. Pretty much using them as solder posts.
Then I soldered them back (the caps were already soldered and re-soldered to, so they are abut ugly) and, after having manufactured the insulating pressing gaskets from fishpaper (there was one original, but it was brittle, and I need two with extra resistors soldered) I put the back.
Then I eventually powered the radio up, and heard nothing but hum. The signal from the generator would not come through. Neither IF, nor the BC frequency.
The oscillator was fine, and the rest of everything checked out fine.
Then I put the scope on the 2nd detector Grid cap...it showed good signal when the radio was tuned to the frequency. All of a sudden the modulating beep slowly rose up and the signal became large.
I was able to tune the local station.
Then I removed the scope clip from the Grid cap, and the signal slowly faded away.
I am not sure what I did, but eventually the signal stayed.
So I removed the tubes, took Qtips, D5, and cleaned every single tube socket pin and tightened those that I thought were too wide.
Will let it dry and retry tomorrow.
The signal has some distortion. There could be two reasons:
1. The AK uses Plate detector
2. The speaker has been repaired (the cone), and the adhesive seems to be tar. I might procure a newer speaker or send this one for being re-coned.
4 out of 5 resistors in the resistor section were too much off, so I had to fix it.
I opened up the caps, removed the rod, and then parallelled the proper value resistor to them. Pretty much using them as solder posts.
Then I soldered them back (the caps were already soldered and re-soldered to, so they are abut ugly) and, after having manufactured the insulating pressing gaskets from fishpaper (there was one original, but it was brittle, and I need two with extra resistors soldered) I put the back.
Then I eventually powered the radio up, and heard nothing but hum. The signal from the generator would not come through. Neither IF, nor the BC frequency.
The oscillator was fine, and the rest of everything checked out fine.
Then I put the scope on the 2nd detector Grid cap...it showed good signal when the radio was tuned to the frequency. All of a sudden the modulating beep slowly rose up and the signal became large.
I was able to tune the local station.
Then I removed the scope clip from the Grid cap, and the signal slowly faded away.
I am not sure what I did, but eventually the signal stayed.
So I removed the tubes, took Qtips, D5, and cleaned every single tube socket pin and tightened those that I thought were too wide.
Will let it dry and retry tomorrow.
The signal has some distortion. There could be two reasons:
1. The AK uses Plate detector
2. The speaker has been repaired (the cone), and the adhesive seems to be tar. I might procure a newer speaker or send this one for being re-coned.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.