[Amps] SB-220 6 Meter Conversion Article in April QST

[RICHARD SOLOMON]

I am getting ready to convert an SB-220 to 6 Meters. I was looking
at the article in QST and ir stated the Plate Tuning cap is a 100 pf @ 4 Kv
spacing. The article doesn't mention a Mfr or Part Number so I just
looked at the Cardwell site. They have a 154-14 but it has 23 plates
and is 4.5" long. The one in the picture in QST doesn't look that big ??
 
Does anyone know what they used for a Plate Tuning Cap ??
 
Thanks, Dick, W1KSZ