[R-390] R-390 (Non A) For Use With CY-979A Cabinet???

[David C. Hallam]

Bruce,

The R-390 needs absolutely all the cooling it can get.  I don't know whether
it was intended to operate in that cabinet but I would never operate mine in
it.  I have mine mounted in a cabinet some what taller then the radio with a
muffin fan mounted on the side of the cabinet blowing air up on the
regulator tubes.  Both the bottom and top covers are off.

David
KC2JD/4

> -----Original Message-----
> From: r-390-bounces at mailman.qth.net
> [mailto:r-390-bounces at mailman.qth.net]On Behalf Of triodes at optonline.net
> Sent: Tuesday, April 08, 2008 1:16 PM
> To: r-390 at mailman.qth.net
> Subject: [R-390] R-390 (Non A) For Use With CY-979A Cabinet???
>
>
> Guys,
>
> I am restoring a Motorola R-390 (non A) receiver, and it will be
> installed within my restored CY-979A cabinet.
>
> With the 6082 series regulator tubes (as used in the R-390) and
> the attendent heat load they create, will this receiver run the
> risk of overheating within the CY-979A? I do not know if the
> R-390 was designed to be installed in the CY-979A from a thermal
> standpoint.  I have seen mostly the R-390A receivers installed
> within this cabinet.
>
> Hopefully, the engineers who designed the CY-979A designed this
> cabinet with suffiicient vent area and an effiicient convective
> cooling path to be used with the R-390, again from a purely
> thermal/heat load standpoint. Any guidance here would be appreciated!
>
> 73,
>
> Bruce, W2XR
>
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>
>
>
>