02-03-2013, 09:11 PM
Well, done with the electrolytic caps and the main voltage divider resistor chain; only some had to go, the rest is fine.
Many smaller caps have been already replaced. Many resistors are within 5% to 10% so I will keep them.
The volume regulating resistor is gone - when I opened it, I realize that there is a barely noticeable hair crack around the tap, and this what makes it to produce the infinity.
I tried to use a pencil, and after 5 minutes rubbing the resistance came back, and I applied some Deoxit, but after the very first turn the discontinuity came back.
Luckily I located some exact (found the thread in ARF) replacement in Oldradioparts, tomorrow will order it.
The tubes are mostly good; 6A8 is a bit weak, even on the English scale, but I need to fulfill 20 buck min. order in ORP, so I will pick one up.
The previous restorer also rewired the Tuning Eye circuit as he replaced 6G5 with 6E5, and obviously it is more sensitive. No biggie. Will try 6E5 first, but want to get 6U5/6G5. Judging by my Zenith 6E5 works acceptably in the circuit for 6U5 (actually 6T5 but they are electrical equivalents), though the sector does not open all the way as it should, but I could live with it. 6U5 today is about 30 bucks if new. And the 6E5 I have is either new or very good as it is as bright as it gets. I tested it on the Hickok.
Well, so far this is it, will keep at it; need to get the volume control first.
Many smaller caps have been already replaced. Many resistors are within 5% to 10% so I will keep them.
The volume regulating resistor is gone - when I opened it, I realize that there is a barely noticeable hair crack around the tap, and this what makes it to produce the infinity.
I tried to use a pencil, and after 5 minutes rubbing the resistance came back, and I applied some Deoxit, but after the very first turn the discontinuity came back.
Luckily I located some exact (found the thread in ARF) replacement in Oldradioparts, tomorrow will order it.
The tubes are mostly good; 6A8 is a bit weak, even on the English scale, but I need to fulfill 20 buck min. order in ORP, so I will pick one up.
The previous restorer also rewired the Tuning Eye circuit as he replaced 6G5 with 6E5, and obviously it is more sensitive. No biggie. Will try 6E5 first, but want to get 6U5/6G5. Judging by my Zenith 6E5 works acceptably in the circuit for 6U5 (actually 6T5 but they are electrical equivalents), though the sector does not open all the way as it should, but I could live with it. 6U5 today is about 30 bucks if new. And the 6E5 I have is either new or very good as it is as bright as it gets. I tested it on the Hickok.
Well, so far this is it, will keep at it; need to get the volume control first.
