[dnewman]

Before I actually engrave "+" and "-" labels on my panels for the phase
switch on my Chime, I wanted to double check which is really the inverted
position....  (I ask as my RTM leads me to contradict a recollection of Jim
who is, after all, the architect of the wonderful Chime.)

My read of the HagDac manual, leads me to understand that when
ground is presented on the INV pin of the HagDac daughter board,
the output has its phase inverted.  Additionally, the phase switch
mounted on the Chime motherboard connects that INV pin to the
ground plane when the switch is "closed".  Now, with my phase
switch at least, this closed position is achieved when the switch is
set to the right hand side (while the motherboard is in it's final, upside
down position within the enclosure).

Thus, it would seem that the right hand side of the phase switch
is the inverted position.  So why this long question if I can work
this out myself?  Well, once upon a time Jim posted to this group
that it was his recollection that to the right was the "correct" position,

http://www.audiocircle.com/index.php?topic=26190.0

By "correct", I assume that the discussion meant "non inverted".

[And too bad I didn't see that discussion back in March as I could have
readily brought a few NOS 12AX7 tubes to Jon L's home in Fullerton.]

And, FWIW, to the right sounds more correct with my amp and
speakers, but then I cannot swear that my speakers have phase aligned
drivers.  (I know, however, that the amp is non inverting: I built that
myself.)

Thanks,
Dan

P.S. My phase switch is the toggle called out in the manual: an
      on-none-on SPDT toggle, NKK M2012S2A2G30 (Digikey 360-1159-ND).

[hagtech]

right hand side of the phase switch is the inverted position

Son of a gun, it appears you are correct.  Somehow I have managed to flip the around in my head - a problem when designing the board upside down.  Hmmm, so switch to the right is indeed inverted.  Fortunately, about 1/2 the CDs out there are recorded with inverted phase, so it's a 50-50 proposition.  You have to set switch for each CD for best sound.  Same problem with LPs.  I know one guy who marks every CD with the proper position.  Then again, some CDs even flip phase between tracks.

jh

[rollo]

hagtech,
            Was told by recording engineer that odd numbered tracks are out of phase and even in phase.This was confirmed by Scott Markwell in my home.Nice to see a smart manf. offering invert capabilities as it is MIA in most equip. especially digital.The only CD's in absolute correct phase in my experience are;RR,Chesky,Telarc and original Acoustic sounds.The only thing you need to do is determine What phase the system is.Listen for tighter bass,less or no sibilance and amore open soundstage your in phase.Think you were being kind about 50%       
             
             cheers rollo

[BobM]

Welcome to AC Charles. It's about time you decided to join the on-line community. Now go complete your registration so people can PM (private message) you on this forum. 

Polarity must be popular these days. Here's a link to another thread over at Audiogon:

http://forum.audiogon.com/cgi-bin/fr.pl?ddgtl&1163627385&read&keyw&zzdigital+domain+phase

Enjoy,
Bob

[hagtech]

Somehow I have managed to flip the around in my head

Double crap!  I just realized why I had this switch backwards.  The tube output stage inverts.  Therefore, the HAGDAC has to be run inverted if used in a CHIME.  Then the output is positive.  So heck, I guess I had it right the first time.  Switch to right is indeed non-inverted.

Sorry for the confusion.  With 19 products and two more on the way it's really hard to keep this all straight in my head.  Easy to forget what my thoughts were two years ago.

jh

[dnewman]

Yes, the early Sylvannia data sheets for the 12AX7 describe it as
"designed for service as an audio voltage amplifier or phase inverter".

Anyhow, I've updated my writeup on the Chime, fixing the front panel
designs and images.

Thanks for following up on this.

Happy New Year,
Dan