I'm not sure if this is the correct term for the unit I am looking
for.  In the Player Piano Company's 1983-85 catalog the unit is called
"The Amplifier, in-line booster ... works the same as a primary valve".

I need the unit to test valves when it is not feasible to hook up the
tier to the bleed strip.  Does anyone have such a unit that I could
purchase or is there another method for testing without the bleed
strip?

Donald Barton - Barton Player Piano Co.
Minneapolis, Minnesota
tel.: 1-612-378-1102
bartonpiano@q.com.geentroep [delete ".geentroep" to reply]