Best place for standby switch on 5F2A???

[tubeswell]

Working at home today drilling holes in bits of Aluminium for my tweed princeton chassis, thinking, "okay if I make provision for a hole for a standby switch, where is the best place to wire it to? Ahem...", (or mayhem, whichever you prefer):

1) The B+ supply between pin 8 of the 5Y3GT and the first filter cap?; or

2) A switch that disconnects the center tap of the HT winding on the PT from the ground?; or

3) Someplace else?

And, is it simply a matter of inserting a switch in one of these locations, or do I need to add some other stuff to make it safe?

The type of switch I'm thinking of is a single pole single throw switch.

Cheers

[Chuck_Farlee]

I usually put the standby right after the rectifier(s), so I'd choose choice #1.

I have used #2 before, but one of the engineer types over at the AX84 BBS said that diconnecting the CT of the HV winding messes with the grounding scheme so I don't use that method any more. Makes sense to me.

chuck

Working at home today drilling holes in bits of Aluminium for my tweed princeton chassis, thinking, "okay if I make provision for a hole for a standby switch, where is the best place to wire it to? Ahem...", (or mayhem, whichever you prefer):

1) The B+ supply between pin 8 of the 5Y3GT and the first filter cap?; or

2) A switch that disconnects the center tap of the HT winding on the PT from the ground?; or

3) Someplace else?

And, is it simply a matter of inserting a switch in one of these locations, or do I need to add some other stuff to make it safe?

The type of switch I'm thinking of is a single pole single throw switch.

Cheers

[tubeswell]

follow-up on standby sw location

FWIW I talked with a few more peeps and decided to go with the HT center tap for the standby switch, and there haven't been any problems related to grounding so far (touch wood).

[stokes]

I usually put the standby right after the rectifier(s), so I'd choose choice #1.

I have used #2 before, but one of the engineer types over at the AX84 BBS said that diconnecting the CT of the HV winding messes with the grounding scheme so I don't use that method any more. Makes sense to me.

chuck

How does disconnecting the CT "mess" with any grounding scheme?It only lifts the CT,doesnt affect any ground whatsoever.