UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Tektronix 465B Scope

Leon Crampin · 4th Jul 2013, 2:03 pm

Connect the shorted plates to one of the connections to the deflection amplifiers - x or y as appropriate. The plate pairs will then have a leakage path to earth and also be held at about their operating potential.

The tube's not looking good.... (but check that EHT oscillator supply decoupler - that stage makes quite a racket as it's powerful, having to also supply the tube heater).

Leon.

4th Jul 2013, 2:03 pm	#59
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,870	Re: Tektronix 465B Scope - Some problems. Connect the shorted plates to one of the connections to the deflection amplifiers - x or y as appropriate. The plate pairs will then have a leakage path to earth and also be held at about their operating potential. The tube's not looking good.... (but check that EHT oscillator supply decoupler - that stage makes quite a racket as it's powerful, having to also supply the tube heater). Leon.