two unknown tubes

Nigel Holmes 03 9626 1914 fax 03 9626 1917 HOLMES.NIGEL at A2.ABC.NET.AU
Tue Jan 19 09:59:59 EST 1999


 Can anyone help  with some specs for these tubes? I thought I had
 comprehensive references but these have me stumped :(

 1. tube marked  6RA3 Made in Japan, in a CEI box (red & white) marked
 6R-A3. Appears to be a tetrode, plate looks about 5 to 10 watts, cathode
 looks robust (sim. to 5763)

 2. tube marked VU508 & 10E/520, glass high vacuum rectifier, anode top
 cap, oxide coated fils, European 4 pin base


 any help appreciated


 cheers Nigel VK3ZNQ  AMI# 1040
 holmes.nigel at a2.abc.net.au

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