On 21 Apr 99 at 20:38, Tony Duell 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
>
> The European (strictly Philips/Mullard) numbers for those valves are
> (I've just looked them up):
>
> 12BA6 = HF93 (RF/IF pentode)
> 12BE6 = HK90 (pentagrid frequency changer)
> 12AT6 = HBC90 (double diode triode)
> 50B5 = (No european equivalent, but 50C5 = HL94 (output pentode)).
> 35W4 = HY90 (rectifier).
>
> And I'll state that I have _never_ seen any of those valves in a UK
> radio. 'H' heaters (150mA) are rare over here, as are pentagrid
> converters in mains sets. A typical late-series UK AC/DC set would use :
>
> UCH81 (triode hexode frequency changer)
> UBF89 (double diode + IF amplifier pentode)
> UL84 (output pentode) or UCL82 (triode output pentode)
> UY85 rectifier
>
> Or, closer to the AA5 :
>
> UCH81
> UF89 (IF pentode)
> UBC80 (double diode triode)
> UL84
> UY85
>
> Other possibilities include the B8A 'rimlock' valves :
>
> UCH42, UF41, UBC41, UL41, UY41.
>
> Or loctal valves :
> UCH21 (triode hexode changer)
> UCH21 (hexode as IF amplifier, triode as 1st audio)
> UBL21 (double diode + output pentode)
> UY21 (rectifier).
>
> But there were plenty of other variations...
>
> -tony
>
Thanks Tony. A good reference to keep with my old radio manuals.
I have a book with some Euro equivalents but this is good for
recognizing the odd UK one that shows up here.
ciao larry
lwalker_at_interlog.com
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Received on Thu Apr 22 1999 - 13:44:06 BST