[Hallicrafters] 5894 Tube for the HA-6 Transverter

[Jim Wilhite]

David:

If the anode pins are larger and there is an extra fin on 
the plate, then it is possible that it is an 8643.

The 8643 has the same base but the envelope is a bit thicker 
and the rated plate voltage is 750 rather than the 650 for 
the 5894 meaning that the plate dissipation is a bit higher.

Jim/W5JO





> Is there anyone who knows about differences in the 5894 
> tube used in the
> HA-6 6 meter transverter?  I picked up two tubes at a 
> hamfest yesterday.
> One is marked 5894A and the other has no identification. 
> I have tried all
> the usual tricks to raise numbers with no success.  The 
> unmarked tube
> appears identical to the 5894A with two exceptions.
>
> The anode surface has three radiating fins instead of two.
> The anode connector pins on top are about 60% larger in 
> diameter.
>
> In other respects the tubes are the same; the glass 
> envelope is the same and
> the base pins are the same.
>
> Is this tube just an improved version of the 5894A or 
> what?
>
> David
> KC2JD/4