Gents, One of the bug-a-boos about QRO

tubism is the regulation and acceptability

of filament voltages.

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Okay, tube manufacturers tell us “10%,”

and we have to live with whatever

Con Edison or Kentucky Power ends up

at our QTH to ply our signals out and about.

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I know, I know Continental and all them

have Buck’n’boosters, automated

variacs on 3-phase mains: Just everything

money can buy.

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So here’s Dave saying his filament voltage

droops a bit, and I’m sure there are others

out there, running 8877’s or CPX’s and

other thoriated devices, and what can we

as technicians offer them?

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Would it not be fabulous for QST to publish in

its last edition this December, a sure-fire and

affordable means to conquer filament squirrels?

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Let’s say Joe Ham has a wonderful $6K to $10K

linear running tubes that are in need of regulation.

Would it not be remiss to afford 10% more for a

regulation gizmo??

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I know how much a good set of finals cost, and

frankly, I don’t know if I can ante up for a new

set if I pop the ones I got right now.?

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So like owning a car that’s beginning to use a bit

more oil, I keep the drive down a bit on my inputs,

and just hope the beast can gently grow old like

the old man.

?

Hal

W4HBM