Quote:
Originally Posted by Dave S
Any "war stories" on the subject?
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Okay, I would NEVER do this today
, but back when my first CT-100 found me, circa 1963, I built myself a 12 X 12-ft. 'cube' inside a small unheated, uninsulated attic in the family's summer home at Barnegat, NJ. With only one window allowed in the cube, and insulation on all four sides and the ceiling, my cube was easy to electrically heat and cool, winter or summer, on a single 15A circuit. Apparently with nothing better to do, I dismantled my CT-100 and built it into one wall of my cube, complete with a hinged wall below the CRT bezel to access setup controls.
That put the chassis and 15GP22 out in the unheated part of the attic. In the summer it could hit over 100 deg F and well below freezing in the winter.
Ouch.
I had a fan blowing on the CTC2 chassis in the summer, but in the winter there were three distinct temperature gradients on that 15GP22: ROOM temperature on the faceplate (there was no safety glass), FRIGID-unheated attic air on the funnel, and red-hot FILAMENT in the neck. That had to be some serious stress on that old, soft, lead glass, that Harold Law never designed for!
Other than 1X2B focus-rectifier and 6BC7 DC-restorer filament burnouts, that set kept on chucking for two years in that wall. But sometime during the year after reassembling the set in its cabinet, the 15G started some 4th-of-July sparkling in the neck when I tried to power it up
. There's no rot on the phosphor, so that tube will be my candidate for rebuild someday...
And just for old times sake, today my restored CTC2 chassis is populated with those two 'new' tubes
.
Pete