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In Reply to: Re: Best Tube in the Line Stage of a Counterpoint Preamplifier posted by wgallupe on March 24, 2006 at 15:26:45:
I did try them in the Heart CD player.I was surprised that I did not get the same effect as I did
with the preamplifier.They sounded OK, but were little different from standard 6922's.
I find that using pinched waist 6922's in the Heart is
the best.Please note that I have put the following improvements
in the Heart player:1. Upgraded power cord.
2. 'Sand-bagged' both DAC's
3. 'Sand-bagged' the crystal.
Follow Ups:
Auricap tweek that in coming power on that thing & you will notice a large improvement.
I have not tried the pinched waist but have found 1960s vintage 6922s by Amperex and Siemens to sound the best. I upgraded the output coupling caps to Dynamicaps. An easy mod. You should try rolling your favorite caps into the CD6000...
'Sandbagging' is a tweak where you create a small golf-sized
ball of dense material (i.e. sand) and double wrap it in
plastic and cloth.This is used by placing it on top of the item you
wish to isolate from vibrations on the circuit board of the
CD player (i.e. the DAC and timing crystal).This is a cheap but very effective way to significantly lower
'judder' distortion in a CD player, and will make the Heart
CD player really come alive.The tweak came from Jon Risch:
http://www.geocities.com/jonrisch/index.htm
By the way where are the output coupling caps located
in the Heart CD player?Good Listening
on the same PCB as the tubes. There were a couple versions of the CD6000 so location may vary a bit. The link below will bring you to a review with a pic of an older version. One cap is vertical and between the tubes, the other horizontal under the right tube. My newer CD6000 OSE LE looks a little different.
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