On Sun, 13 Nov 2005 11:33:24 -0800, "Caveat Lector"
wrote:

Yep as MFJ sez its a Tuned RF Amplifier

"The MFJ-1045C RF Preselector let's you copy weak signals, while rejecting
out-of-band signals.
It's a high gain tuned RF amplifier that covers 1 to 54 MHz in four bands."
I had a bad ass S-40B about 15 years ago. I fully restored it to way
better than specs (I think. I tune old tube radios by ear with
atmospheric noise.) Made a calibration chart for it and thoroughly
enjoyed it. Gave it away.