[R-390] Covers & Cabinet

Fri, 26 Sep 2003 17:53:21 -0400

Hi Ron & Crew

Conventional wisdom is to remove both top and bottom covers when installing
in a cabinet.  Also in the "official" instructions.  Probably better to
leave the RF deck cover (AKA "Utah cover") in place if you have it.  Helps
to keep dust out of the coils and mechanism.

If this is an R-390/URR exactly -- meaning a "non-A", there are additional
heat issues, particularly the 6082's which are upside down on the audio
chassis.  The heat rises and cooks the works.  It's a good idea to position
a muffin fan opposite the holes in the side panel to draw the heat out.
Hopefully your cabinet has louvres on the left side that more or less line
up on the 6082's.  At least don't position the cabinet such that the left
side is blocked.  You might want to see if any of the components in the
audio chassis have been "pre-cooked".  Dave Medley advises replacing the
(2-watt, I think) 47 ohm resistors with 5-watt.

Barry

----- Original Message -----
From: "K3PID" <[email protected]>
To: <[email protected]>
Sent: Friday, September 26, 2003 5:08 PM
Subject: [R-390] Covers & Cabinet

When the R-390/URR is installed in the cabinet does it normally have the top
and bottom covers attached? Is there a cooling issue with both?

Tnx
K3PID - Ron H.

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