February 20, 2015
I will need at some time two of the valves for this 1929 radio, a S22 and a HL2
S22 = B262
HL2 = VR27-2volt = CV2991 VT105-GPO = CV1673 and possibly also = HL2K = 210HL = CV1050 PM2HL = VT50
No urgency but as these may be hard to find, particularly the S22, I thought I would start early.
All cost paid etc as usual. Thanks for searching your stocks.
February 18, 2015
Looking through Marconi valve catalogues, by early to mid 30’s type S22 was no longer listed. However, type S24 appeared with a characteristic very similar to its predecessor. Looking at the specifications S24 does not completely cut off anode current at point of inflexion (anode kink) which in itself should not be problem.
Both types can have either a plain or metallised bulb. Unfortunately I don’t have either but adding S24 may widen the search.
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