When an RA.66 Panoramic Display is used in conjunction with either an RA.17 or RA.17L
it is first necessary to fit an MA.251 Buffer Amplifier between the receiver’s 2nd
and 3rd mixer stages. RA.66s are very rare and sought after. MA.251s are even rarer.
Genuine MA.251 from RA17L N3372. Note: The BNC and mini Burndept connectors are swapped.