Colvern radio frequency coil wound on bakelite former with internal adjustable interchageable coupling coil
Gambrell plug-in radio frequency coil, one of a pair, with holder Gambrell plug-in radio frequency coil
Gambrell plug-in radio frequency coil, one of a pair, with holder Gambrell plug-in radio frequency coil
Pair of Gambrell plug-in radio frequency coils with holders Pair of Gambrell plug-in radio frequency coils with holders
