Topband: Submerging variable caps in oil as substituteforvacuumvariables

[Richard Karlquist]

On 2014-02-02 05:58, Hardy Landskov wrote:
> FYI All,
> The HP4815A Vector Impedance Meter submersed the main tuning capacitor

> I need to open mine up and replace one of the capacitors because the
> oscillator will not start on the higher frequency ranges. I am gun shy
> at this point until I know exactly what I am dealing with.
> 73 Hardy N7RT

The guy who knows everything about the 4815A is ex-HP'er
George Sandford who is still in business supporting these
classic instruments.  If anyone would know about the
oil, it would be him.  He probably has some NOS oil on hand.

See:

www.hp4815a.com

Rick N6RK