[R-390] R-390A trouble

[Bill Smith]

Try poking a scope around the test points in the RF stage.  They are very
high impedance, you may need to decouple the scope somehow (inductor or very
low value of capacitance in series with the probe).  You can get a stage by
stage measurement that way, though.

You can measure quite a few resistors and circuit values by poking around
with an ohm meter (with power off).  Between the back panel, tube socket
pins and the test points, most components can be tested.

Bill

----- Original Message -----
From: "Joe Foley" <redmenaced@yahoo.com>
> +++++++++++++++++

> Tube extenders?  Roger, are you telling
> me,................

> There's more than ONE way to skin a cat???
>
> heheheheheheheheheehehhe
>
> Joe