Bill Jeffrey
2003-10-14 17:16:02 UTC
I have a chance to buy a neat looking tube. It looks like a WD-11,
full-silvered inside, no evacuation tip. Four short brass pins, one
bayonet pin on the side of the base. The base (below the glass) is
thick black plasitc, with four evenly-spaced up-and-down ridges. I
cannot see a type marking anywhere on the glass or the base, but there
is a paper (apparently) label that says "Songbird Detector & Amplifier",
and a picture of a bird. Filament tests good, a handwritten note with
it says it is a 3-volt filament (or at least uses a series pair of dry
cells). Asking price is $65.
Question 1 - I don't know anything about this tube. I would welcome som
einfo, including web links (Google turned up nothing ...)
Question 2 - obviously, should I buy it? Are they rare or common?
Thanks
Bill Jeffrey
full-silvered inside, no evacuation tip. Four short brass pins, one
bayonet pin on the side of the base. The base (below the glass) is
thick black plasitc, with four evenly-spaced up-and-down ridges. I
cannot see a type marking anywhere on the glass or the base, but there
is a paper (apparently) label that says "Songbird Detector & Amplifier",
and a picture of a bird. Filament tests good, a handwritten note with
it says it is a 3-volt filament (or at least uses a series pair of dry
cells). Asking price is $65.
Question 1 - I don't know anything about this tube. I would welcome som
einfo, including web links (Google turned up nothing ...)
Question 2 - obviously, should I buy it? Are they rare or common?
Thanks
Bill Jeffrey
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