"Scott Dorsey" wrote in message
...
wrote:

I just bought a Lampkin 107C Service Monitor. It has an accessory
that I didn't get. It's the 20DB attenuator pad (part No. FAP-20).
Does someone have a schematic available so I can build one? I'd also
buy the unit itself.

Pomona Electronics will still sell attenuator pads. Or you can make
your own up; the schematic is in the ARRL Handbook.
--scott

Also keeps low level noise, mixer products, etc. out of your lab setup.

I built a small unit 20-20-10 with slide switches based on the handbook out
of circuit board, using solder wick to seal the back cover and a short
RG400. About the size of the CE-6 pads. It is said slide switches have
less inductance than others but I don't know for sure. Color TV tuner
cleaner and lube was a great help (blue stuff) with my junkbox switches. It
has come in handy over and over in various applications.