They are far from rare, and have a horrible noise figure. They will
substantially degrade most boatanchor receivers much above
12 MHz. Lot'sa gain, lots more noise...

Pete

"W5vhp" wrote in message
...
I have for sale a most rare RME DB-23 preselector. This is a low-noise
r.f.
amp. used to substantially improve performance of the older boat-anchor
receivers. Covers ham bands 80/75, 40, 20, 15 and 10 meters, but not the
WARC
bands. Compace size, 7 1/2 w, 5 h, 6 d.

Unit in super nice cond. All original with orig. knobs. Lettering is
nice and
bright. With instx. sheet and orig. box. Very little apparent use.

$50.00 money order, plus shipping ups in USA. Shipping wt. approx 7 1/2 #

Please reply by private e-mail, if interested.

73,

Larry W5VHP