09-21-2008, 05:04 PM
Some things you need to know about your AK 20 Big Box:
1. the RF stage grid resistors are open (simple 500-600 ohm resistors).
2. one or both of the audio transformers are open (replacements are available)
3. the detector grid resistor is open (common 2 meg)
4. the tuning condensers will most likely need some disassembly for contact cleaning and bending.
5 the filament rheostats will need to be removed for contact cleaning.
6. a miniature 8 or 40 ohm speaker can be used in the horn with the right transformer
7. you will need a power supply (recommend an ARBE III) to power it.
You can contact me at any time for assistance
lawnweeds100@yahoo.com ; I've serviced or restored over 50 of these Atwater Kent TRF's.
1. the RF stage grid resistors are open (simple 500-600 ohm resistors).
2. one or both of the audio transformers are open (replacements are available)
3. the detector grid resistor is open (common 2 meg)
4. the tuning condensers will most likely need some disassembly for contact cleaning and bending.
5 the filament rheostats will need to be removed for contact cleaning.
6. a miniature 8 or 40 ohm speaker can be used in the horn with the right transformer
7. you will need a power supply (recommend an ARBE III) to power it.
You can contact me at any time for assistance
lawnweeds100@yahoo.com ; I've serviced or restored over 50 of these Atwater Kent TRF's.
Pete AI2V
