Steve,

I remember going into the ham store in Oakland CA in the late 60s when 
the rigs with the sweep tube finals were just out and people were doing 
in the finals like mad due to their being used to tuning the older rigs.

Behind the counter was a shelf and on it they kept an old sweep tube, 
don't remember which one now, but one side was totally caved in.  It was 
an object lesson of what happens when you mistreat those tubes.

Don w6smb



On 1/26/2010 6:59 AM, Steve wrote:
> My first rig as a General was a Viking Invader, which had 6146A finals.  I
> do remember backing off the drive just a bit from max power, I don't think I
> ever replaced the finals in that rig which I used for six years.
>
> I then got a Hallicrafters SR-400A, which used TV sweep tubes as finals, I
> think they were 6DK6 and you couldn't over drive those without serious
> damage.  I remember having to replace those, and one of the tube envelopes
> had partially melted.
>
> Steve, K8SP
>
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