21 Apr
1999
21 Apr
'99
6:38 a.m.
On 20 Apr 99 at 23:59, Jim Strickland wrote:
Oh, the expression is definitely american. The AA5 were the 12ba6, 12be6,
35w4, 50b5 and the 12at6. British and Euro names for the same tubes could be
different but basicly the same circuit with occasional variants or additions.
RCA could have originated it but everyone and his brother put out sets using it
Kind of like the IBM clones. (in order to get back OT).
The AA5 was, in short, a reference design which was implemented and
marketed, more or less without changes, by quite a number of big and
small firms.
Since it was a reference design, the more OT examples would probably be:
Tandy CoCo 1 / Tato Dragon (both based on 6809 reference design)
WD8003 and NE1000 Ethernet boards (The relevant NSC chip has
reference designs for both a memory-mapped and a port-mapped
implementation. The 8003 is essentially the former and
the NE1000 is essentiall the latter.)
<<<John>>>
Out of
curiousity was the term for the configuration of
the common tube mantle-radio, "All-American 5", used in the UK and
Europe or is this an expression you've acquired from Yanks.
I've seen it used in the US press (albiet magazines about old radios) so
I suspect it's from here in the US. If memory serves it's from a 5 tube
set (as near as I can tell, very like a chipset today) made by one or more
of the major tube manufacturers that had all the components for a simple,
inexpensive superhet radio.