Valves again,

[J. Larry Hendry]

If you can find it, RCA used to publish a book called "Receiving Tube
Manual."  However, it has more than "receiving" tubes in it.  The one I
have (25 years old) also is identified "Technical Series RC-28."  and, I
have a newer one that includes picture tubes and is identified RC-29.  This
manual gives terminal diagrams, technical descriptions, and typical
applications and design operating voltages.

The QS-1215 is not listed.  QS-1205 through 1211 all appear to be cold
cathode voltage regulators and list OC3 and OB2 as direct replacements. 
QS-1217 and above appear to be cold cathode glow discharge triodes
(however, I am cross referencing here).

E-182 appears to directly sub to a 5847/404A which is a sharp cut-off
pentode used for a class A amplifier, but no typical use or frequency range
is specified.

I can find NO reference to any tube numbered ME1400

12SL7GT is identical to the 6SL7GT except for the heater rating.  This is a
High-Mu Twin Triode with no common elements other than the heater.  Since
it only has 8 pins, my guess is that the 12 volt version does not have a
center tapped heater and cannot be run on 6 volts (like many can) but does
required 12 VAC.  Max plate voltage is 300 VDC with 250 typical for a class
A1 amplifier.  It is typically used for RC coupled voltage amplification or
in phase inverter stage in radio equipment.  Total plate dissipation is
limited to 1 watt.


Larry Hendry


----------
> From: Paul Maddox <Paul.Maddox at unilever.com>
> To: synthdiy <synth-diy at mailhost.bpa.nl>
> Subject: Valves again,
> Date: Tuesday, September 14, 1999 9:11 AM
> 
> Dear all,
> 
>  It seems Ive managed to inherit some more valves..
> some mullard ME1400 (red with brown base) some 12SL7GT's
> E182CC and some QS1215 (dinky valve!).. 
> 
> so my question, is there some kind of resource/list of what
> these things are?
> 
>   Paul
> 
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