Mystery Holes in Rear of Amp Chassis

[The New Steve H]

Maybe it's where the flux capacitor hooks up. Anyway, I'm continuing with the build.

[ampfab]

small toggle switch to jump the two inputs?

[Structo]

Holes by the preamp leads me to believe they may have been for mini switches, maybe local feedback, or other preamp mods.

[M Fowler]

I don't know you were fiddling around with PPIMV and Presence and Turbo knob?

[darryl_h]

Pressure relief vents to let the smoke out? [IMG:20:20]http://i497.photobucket.com/albums/rr333/valvetone/smilies/head_scratch_zpsb9a8e69c.gif[/img]

[The New Steve H]

I looked at my old emails to see what I ordered back when I was amassing parts. Nothing out of the ordinary. Maybe it will come to me eventually.

[M Fowler]

Hose bib for liquid cooled power supply perhaps?

[Phil_S]

I looked at my old emails to see what I ordered back when I was amassing parts. Nothing out of the ordinary. Maybe it will come to me eventually.

Inventory the parts that fit in holes that size. Maybe then you will know.

[The New Steve H]

Thought I'd post a photo. I'm sure it's not useful, but maybe people wanted to know what I was talking about. The holes are on the right.

[Zippy]

Did you ever contemplate putting switches on the cathode bypass caps or otherwise altering the V1/V2 bias?

[DonMoose]

THIS is what goes there:

[The New Steve H]

I think I know what it was! I think I wanted switches to bridge the bright and normal inputs. Someone told me it was possible to get a different sound by using some kind of patch cord on the input side, and I probably decided to rig the amp so it could be done with switches.

As of this moment, that's my story, and I'm sticking to it.

[The New Steve H]

Don's idea looks really good, though.

[M Fowler]

On the back side so I'm thinking LNFB switch for one hole.

[Structo]

What's the power resistor on the outside?

Does it have high voltage on it?