In article , K3HVG writes:

If the primary reason for the effort is to improve
sensitivity, a tunable RF preamp (e.g.: Ameco PCLP) with a decent n.f.
will oft times work wonders. I use one of these in-line with the
antenna selector of receivers such as the RBS, RBM, BC-348, BC-312,
various older Hammarlunds and Hallicafters with excellent results on the
higher bands. One size fits all!!

And the *tunable* preamp will also get rid of the image problems that plauge
single-conversion receivers.

I did have an RME pre-amp, with 6BA6s, but never got it going. It ocvered only
the upper Ham bands.

Now, are there general-coverage tunable preamps? Of the hollow-state variety?
73, Mike K.

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