[R-390] Covers & Cabinet

Fri, 26 Sep 2003 20:13:57 -0400

Correction -- if it's a non-A, it doesn't have a "Utah cover" -- more like a
"Colorado" cover (rectangular)

Or, I suppose, it may have an invisible, zero mass cover.

Barry

----- Original Message -----
From: "Barry Hauser" <[email protected]>
To: "K3PID" <[email protected]>; <[email protected]>
Sent: Friday, September 26, 2003 5:53 PM
Subject: Re: [R-390] Covers & Cabinet

> 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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