Question on 12at7 preamp distortion

[nickytheshaft]

Ok Zoran, thanks, I will look into all the options.

 

[PRR]

Nope, only the negative wire. ...

Is that a NO or a YES??

You say you can not attenuate to zero. Yet this exact plan with a properly connected audio taper dual potentiometer was the core of many-many fine hi-fis, even in broadcasting where 2V levels were nominal. There are many ways to connect a pot and I can not see yours from here. Or from your terse posts.

....I also find the output stage WEIRD, certainly
not what I expected from the SRPP label....

I understand why the new guys don't call it by its right name. And that last drawing is tripped-out. But is it a White Cathode Follower. Has been since 1943.
Variations on the Theme of the White Cathode Follower

 

[JMFahey]

Thanks.

 

[nickytheshaft]

Is that a NO or a YES??

What I meant was that the negative of the pot is connected to the negative of the RCA's.

The pot itself in not grounded any othe way.

 

[Mark Tillotson]

RCA have ground and signal. positive and negative are not appropriate for AC signals!! You RCA ground and pot ground all need to sonnect to circuit ground for a volume pot.

 

[nickytheshaft]

RCA have ground and signal. positive and negative are not appropriate for AC signals!! You RCA ground and pot ground all need to sonnect to circuit ground for a volume pot.

Of course, negative is ground... my bad