[AMRadio] SP 600 question


rbethman rbethman at comcast.net
Tue Sep 15 15:10:40 EDT 2015


On 9/15/2015 3:00 PM, w5jo at brightok.net wrote:
> I wonder about the first RF  amp. tube in this receiver.  What I would 
> like to know is what the value of the screen resistor is in the 1st. 
> RF  and the value of the resistor in the plate lead, if any.  Also the 
> recommended voltages on the plate and screen of that tube.
>
> Jim
> W5JO
Jim,

These are for the Northern Radio SP-600 J  [No X]

Screen Resistor R3 - 33k
                           R4 - 1k

Plate has an L7 - 192uH
                      R5 - 510
                      R6 - 1k

Regards, Bob - N0DGN


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