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Dear Pat and All,
is "your" 807 the same tube as I
remember: PA-tube, 6V heater, anode loss 25W, anode voltage 400 to 700V,
penthode.
It was used for homebrew transmitters, often with the GELOSO-VFO ( CW
and AM only ). One connection ontop of the glass, I think that was anode. A
rather big tube. If it is the same - why building a receiver with
it? :-)
73 Walter DJ2LF
Hi All.
John, I can remember building a Rx using three 807's in which one was
strapped as a triode as RF amp. In the mid 1950's they were often for sale at
less than one shilling each (I shilling = 12 pence, £1 = 240 pence brfore the
UK went decimal coinage). They would run with 45VDC on anode (plate) as HT
(B+). For an impoverished schoolboy they were magic! When "three-legged fuses"
arrived many of us were shocked that someone had invented a destructable
active device which didn't have a filament (heater), couldn't be made to glow
purple and would "destruct" without a visible sign to suggest that it had ever
been connected to an electrical supply !
However, my ability to construct a Rx in a Woolworth plastic lunch box
which would provide test match commentary in a corner of the school yard at
lunchtimes with three-legged devices identified only by the colour of a paint
spot, gained me so much popularity from my fellows (I cannot now remember what
the equivalent epithet to "nerd" was) that I soon stopped believing that RCA
807 = "The Holy Grail" !
73 de Pat g4gvw
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