Stupid Pot %$^$%^$%& suggestions

[iccaros]

ok here is the issue
I am in the middle of building a high octane http://www.ax84.com/static/hioctane/AX84_Hi-Octane_101004.pdf but using sub mini tubes...
I used a SMPS from http://www.tayloredge.com/storefront/SmartNixie/DataSheets/Datasheet_1363-1364.pdf

no matter, maybe

so I have the pot all the way on (wiper measuring shorted with lug 1 on the pot) I get volume, full of blocking distortion and screeching.. SMPS.. go figure..
When I turn the pot to the wiper to pin 3 and measuring ground on the wiper and 1meg to pin 1, I get clean guitar audio.. WTF.. Should not this kill all volume sending the grid to ground.. I know there is a 220K resistor in the way and a cap, but could that be the reason?

thanks

I fried the SMPS, stupid @#$@#$% not sure why a tube moved and must have shorted something, as the tubes got hot and the Power supply started to smoke..
I am ordering a real supply. and building on turret, used a Radio shack PCB bread board,  But the pot if driving me nuts....

[R.G.]

It's probably not hooked up the way you think it is. Just guessing.

[iccaros]

that is what I hoped, but, I have metered it out several times... the only thing I can guess us that I have way too much gain, and the cap after the pot is reacting to the audio.... its my only

I am pulling the who thing apart and creating a turret board so I can re look at this, just wondering if the cap and voltage divider on the wiper could cause this.

thanks

[R.G.]

Is your ground all connected together?

[iccaros]

ya, Checked again
weird thing, when reading the pot in place it shows 370K but remove from the terminals it reads 1meg, it is a 1 meg A by the way...
the picture is large, I have found it better to click load into new tab to see the whole... sorry..

thanks for the help..


here is a bad picture


better picture, hope it helps...

[slacker]

Is it possible that the signal is finding another way past the pot? Maybe something else is connected wrong, or you don't have enough filtering on B+3 and the signal is leaking through that.

What happens if you disconnect the wiper?

[kdowqo]