[TenTec] Quieting fan

[tongaloa]

Rick Westerman wrote:

>It was the 70's and the mobile amp was (as I recall) the HA-14
>using 2x 572B's.
>
>The problem with the SB230, apart from the tube being highly
>poisenous, is simply the cost of a new tube and the extreme
>difficulty of locating one anyway.  Otherewise it was a good amp.
>
>73
>Rick
>  
>

Berylium Oxide thermal coupler is not a danger. It's the dust created if you
try to machine it or crush it. This material is common in high power LASERs
and some power semiconductors.
y

>  
>