April 1933 QST
Table of Contents
Wax nostalgic about and learn from the history of early electronics. See articles
QST, published December 1915 - present. All copyrights hereby acknowledged.
At Last - Some Different Toobs!
Manufacturers Reluctantly Start Production of New Bottles
Good news, fellows! After an interminable period of waiting, we can at
last announce a few new chubes for the use of hams only. It must, in fact,
have been all of four and a half days since the last preceding
conglomeration came from the drill-presses (and only a measly 34 new types
then) so OST's daily bulletin on new tube types has been discontinued. But
Out of the 68 new types announced today, we can only describe three in
detail. These have been developed by the R.A.C. laboratories at the express
request of OST (express because the request was too big to go by parcel
post). Needless to say, all these new tubes have power to burn, especially
the 254G63A13S, shown in one of the photographs.
An Exclusive Photograph of the 254G63A13S in its Native Environment
Installed in a complete transmitter. The door is open to show the
internal construction of the tube; Note the High-C circuit. The tank
capacity is 200 liters. Heavy pipe conductors are used because of the
intense heat generated in operation.
The 254G63A13S is made only for ultra-high-frequency kitchen
transmitters. The oscillations generated are very short in wave-length, but
oh boy! is there hot stuff in that tank circuit!! Did you ever back into a
hot radiator with its rear end uncovered ? Well, then you know how we felt
when we did the same thing. That explains perfectly the operation of this
We must admit a slight disappointment when we found the new tube had only
two grids. That's hardly enough for a modern tube. However the second grid
isn't really a grid, if you know what we mean. Actually it's the plate,
wound in a spiral so no external tank inductance will be necessary. The
cathode is a multi-hole affair with jet emitters. We don't know what the
inner grid is for but the makers seemed to think it was necessary. A novel
feature of the 254G63A13S is the two-piece cast-iron envelope. A secret
process of manufacturing a clinging vacuum makes this new development
possible. The importance of this cannot be overestimated for it provides for
continuous rejuvenation of the tube. When the tube becomes sluggish in
action, the door can be opened and the accumulated electrons cleaned off the
grid and plate with a brush. The electrons can be saved and used over again
if one wishes to be ultra-economical.
This tube is guaranteed to deliver plenty of red hot juice at short
Two New Bottles
Some interesting glassware has been added to the list in the 123456ZZXQ!&
and the OHNO123UGH shown suitably juxtaposished in the shecond photograph.
The XQ!& (for short) is at the right. It goes into oscillation with
remarkable ease at any frequency, but unfortunately has a tendency to become
unstable and get out of control if used continuously. Comes in several
sizes, the largest variety being illustrated here. It packs a tremendous
wallop and can be used with wonderful effect so long as care is taken to
keep the operation below the spilling-over point. This depends mainly on the
capacity of the tank. High C is desirable. A good-sized leak also is
The 123UGH (also for short) is a small but highly efficient bottle
particularly useful as an exciter. Its specialty is the elimination of
parasites. Experience with the 123-UGH has shown, however, that in spite of
its high output it is prone to give a spattery a.c. note unless used with
caution. A particularly good tube to give the young squirt in the next block
who calls you at 2 p.x. when you're trying to work some DX.
THE OHNO123UGH AND 123456ZZXQ!& Two small but powerful bottles which work
like brothers in push-pull but not so good in parallel.
Yep, There Are Others
For instance, we have the 273DYWL29F, 36ELGH39, EIGH29AHG, $&c178,
A:EUC26, 38GH20, QCCH2837, QPW029, WM2938HT, DKEIG29, 2937, WUYN &?,
29QODJ56w, EOA395FG, QPDI563, 639ALC56,
(Continued on page 97)