In article ews.net,
"gravity" wrote:

http://www.universal-radio.com/catalog/preamps.html

i can't vouch for the quality.

RF systems SP-1 looks like it but it's $99.95. I guess that's not
unreasonable but seems a little high.

I could build one for $20. Mini circuits have small transformers and you
would need to buy a metal box and three PL-259 connectors.

--
Telamon
Ventura, California