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Front view [23K]

  • Released mid-1954
  • Covers 7.5 to 250 Mc/s
  • Sine and square wave.
  • Single 12AT7 valve.
  • Size 13.5" by 10.25" by 8.25"
  • Original cost £45
NOTES A signal generator aimed at the servicing of television sets, released just in time for the beginning of Band III television signals.

Click for larger advert [171K]Period advertisment [171K] from the July 1954 edition of Practical Television magazine.
SERVICE DATA Nope :-( I'm intriqued as to how they generated a square-wave modulated carrier with just a single double-triode valve.
CURRENT STATE Pretty clean and working, the only minor fault being the tendancy for the tuning scale to stick in the middle for no obvious reason.
WHERE FOUND July 2003 Haydock park event for a fiver.

Chassis View [27K]H.T. Metal RectifierThe one and only valve - a 12AT7
The case is basically one large screened box. Even so, the
main circuitry is housed inside another metal box - inside
yet another metal box !!!


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20th March 2002