[R-390] Question

[rbethman]

Roger,

Then I would have to say that there is definitely some bad info *someplace*!

There is only one "model" of the IF subchassis for the R-390A.  Either 
it is the early version, which has NO trimmers for the filters, then the 
later one WITH trimmers for the filters.

I have an EARLY one, NO trimmers, BUT it is stamped MOD 1.

C-553 is STILL there - and in the SAME place!  It IS a paper cap in 
"most" IF Chassis'.  I have found a Sprague Vitamin Q in others.

In ANY event - REPLACE IT as stated on Chuck Rippel's page!

If it isn't replaced, a surge CAN take out whichever filter is in-line!

[Knock on wood!  Haven't lost one yet!]

Bob - N0DGN

On 4/22/2011 5:40 PM, rkofler at aol.com wrote:
> Thank you for all the responses. What I meant was, in the Y2K Manual,
> there seems to be two models of IF sub-chassis, the older unmodified
> model, and the newer MOD 1 sub-chassis. In the drawing of the older
> chassis, C-553 is plainly visible. On the drawing of the newer MOD 1
> chassis, C-553 is not listed. The reason I mentioned the trimmers on
> top of the filters is that the manual mentions that as a way to tell
> which model of chassis it is. If the filters have trimmers on top, it
> is the newer MOD 1 chassis.
>
> Maybe I'm reading the manual wrong.
>
> Roger