FS: CRM-50092 VLF-LF Pre-Selector for the RCA RAZ / RAZ-1 LongwaveTRF Receiver. >From the Joe Schroeder (W9JUV) Military Collection. Has beenused as a passive tuner to reduce BCB overload for a low frequency receiver andwill need a tube. $85 + shipping - or - Can deliver to the Dayton Hamvention