The transformer and nearby audio output tube do heat up that corner
seriously.  Many of us prolong life with a small fan.  I just take a
computer fan (larger diameter preferred), put some rubber feet on it,
and then simply place it on the top cover of my R4B over that area.
The fan is oriented so that the hot air is drawn upward.  I run the
fan on reduced voltage so it is not heard.  It's a simple non-invasive
trick and makes a big difference in temp.

Dennis AE6C

On 6/17/12, Eugene Balinski <[email protected]> wrote:
> All,
>
>    Was poking around the operating table the other day when
> my hand happened to brush across the top of my R4B.  I
> noticed that even through the top cover, the transformer
> seemed very warm - virtually hot.  I will assume that this
> is not normal (never noticed it before) and is indicative
> of a problem ?
>
>    If this is an issue, any ideas on where to look ?  Leaky
> cap in PS ?  Audio and performance seem nominal....
>
> 73 and thanks,
>
>     Gene K1NR
>
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