[HAM] Covers over Oil Filled Reverbs

[George Matthis]

Thanks Mark.  I was looking in a JR20 and wondered.  Also noted the amp 
itself was supported on four springs set into the base of the cabinet.

----- Original Message ----- 
From: "William Mark Bristow" <gfc at classicnet.net>
To: <hammond at zeni.net>
Sent: Monday, October 02, 2006 11:28 PM
Subject: [HAM] Covers over Oil Filled Reverbs


> George,
>
> The cloth covers are there because the units were mostly in open air
> cabinets - and containing oil - attracted dust.  The cloth bag hopefully
> keeps dust - bugs, spiders, mice, etc., from getting into the oiled 
> tubes -
> and the suspension spring mechanism which "balances" the whole apparatus.
> All Hammond tone cabinets such as the PR-40, HR-40, etc., were open back -
> and instructions state that they be placed at least 6 inches from a wall -
> to allow for sound reflection and heat dissipation from the tube amps. 
> Most
> of these reverb units were originally sold in churches and halls - where 
> the
> "church mouse" and other such might try to nest in the mechanism.
>
>
>
> Over the years, I've turned on many a Hammond/Leslie and heard a church
> mouse (literally) running for his life.
>
> Mark
>