06-06-2017, 09:35 AM
In the photo's I'm looking at of the valve there are 3 separate structures in it so must be three separate cathodes, the cathodes heaters are connected in series, the Philips data sheet and photo's of the valve seem to me to confirm that as per photo's and data here:
http://www.r-type.org/exhib/abc0014.htm
Lawrence.
http://www.r-type.org/exhib/abc0014.htm
Lawrence.
