73
Hank WD5JFR
"K3HVG" wrote in message
...
Let me also add the following... In order for the system to function, one
would need the 2321E loop antenna, the special (balanced)loop antenna
cable set, and any of the 551-series servo amplifier/indicators. Without
these items, one simply has a LF/MF receiver. For listening, simply
connect A+, ground, headphones, and a wire antenna to the sense antenna
input. Input voltage (12v or 28v) is rear-panel selected. No internal
changes are required.


Many of the old tube ADF sets were repurposed for boats years ago and
they did not hold up terribly well especially on salt water. Both the
Motorola/Bendix and King Radio units are very desireable for BCB DXing
today. Avionics shops will sometimes give you them if you ask properly
along with old dynamotors and such.