[gary rabbitt]

Hi sdradioman,
A few posts back you mention the .008uf/100V cap. (on the Factory parts sheet it is part 56). There is a reason for those caps to be rated at 1kv or more. 
If there is a static crash, like from a bandswitch being changed, an close lightening (audio  or sharp spike or similar audio, the tube could go into cutoff and the could cause internal flashover in the trans from the field collapsing.  When the collapsing field in any trans can cause a kickback or flashover spike of high voltage for an instant, the cap rating is needed to mitigate that energy and protect the trans.

 This is the same action that was used for automotive ignitions back ion the day. The opening of points, the collapsing field would cause the ignition spark.

  I personally will seek out the same voltage spec, even higher, on those caps in the output rated for 1KV or more. While the 'normal'
 voltage on those pints may be only a couple hundred volts, the spike Voltage for that instant can reach over a KV or more.

 The late Leigh Bassett and another person made the same comment about using the higher voltage spec caps on the outputs.  

Just passing this along, many of you probably know the reason as well already.