[Heathkit] HO-10

[Jim Brannigan]

The sweep oscillator generates a signal rich in harmonics.  There is little
or no filtering or shielding in these scopes and one lead is connected
directly to the receiver.
What you are experiencing is "normal"

Jim


>
> Didn't seen anything relative to this in the archives so thought I'd try
here.
>
> Just got a very nice looking HO-10 scope.  Seems to do what it is supposed
to
> do.  And one thing additional -- like, when it is turned on, as it warms
up
> (five or six seconds) it starts to generate hash in any receiver around.
> Appears to be about a half S-unit.  As the beam is moved down, using the
Vert
> Pos control, the hash decreases.  Moving the beam to the top of the CRT
the
> hash gets stronger.  No other control affects the noise, including the
> intensity or focus controls.