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Old 28th Aug 2014, 3:32 pm   #2
PJL
Dekatron
 
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 4,450
Default Re: Couple of very old valves wanted?

The PM1A has quite unique characteristics and I had to resort to ebay to get one for a Fellows Little Giant 2 as it wouldn't work with anything else. They do come up and don't fetch too much. I have never seen a PM3 which is another early PM series valve but they also show up occasionally.
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