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CD Greenbacks, ever heard of them?

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Posted on May 18, 2020 at 16:25:57
Doublej
Audiophile

Posts: 678
Location: Boston
Joined: January 11, 2009
I found a stack of them when rummaging through a deceased friend's audio stuff. Anyone ever heard of these tweaks?

They are thin green cd's shaped disks. Very homemade looking.

I assume that they are simply placed on the top side of a CD and then the CD is played. Is this correct?

There is a label that indicates the top side from the bottom side but I can't tell a difference between them.

Were they marketed as reusable or am I supposed to use it once or a few times and then its magic powers are lost?

And finally anyone know how much they went for back in the day?

 

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RE: CD Greenbacks, ever heard of them?, posted on May 18, 2020 at 20:17:21
Sondek
Audiophile

Posts: 9623
Location: Fort Worth
Joined: May 17, 2000
Contributor
  Since:
April 5, 2002



Yep. Unclestu, an inmate here for many years, may he rest in peace, used to give those away, and he may have asked for a dollar for them or so to cover mailing from Hawaii. He was big on experimenting with tweaks and then sharing them and what he found with anyone here that was interested. He was kind enough to custom-punch one of those for the bottom of the drawer of my Magnavox CDB465. I still have this one.

These were placed on top of the disc. The idea was the green color absorbed errant red light refracted through the polycarbonate which might reduce effectiveness of the laser pickup. The additional mass of the Greenback also, at least theoretically, improved rotational stability and damped vibrations in the disc. They were meant to be used over and over and over, and ...

I really miss Stu around here. He was an exceedingly kind, gentle man. Knew his shit too.

 

RE: CD Greenbacks, ever heard of them?, posted on May 18, 2020 at 22:53:33
hawaiiguy
Audiophile

Posts: 154
Location: island of Oahu, State of Hawaii/USA
Joined: July 17, 2001
I remember one dealer on the east coast was selling this product --saw the ad in stereophile in the early 90s! What he did with his 'all they way mods' for the Harmon Kardon hd7600 cd player back in the early 90s..comparable he says to $3k cd players or more at that time... yeah, he gave it out free to his customers..including me...his shop was THE high end shop on Oahu, I'd say all of Hawaii...yet he was so down to earth, and his shop would not look like a show room, but more like a work shop with parts all over the floor and cabinets, etc with listening rooms.

 

Thank you for that and I share your view of unclestu. GREAT guy/contributor!...N/T, posted on May 19, 2020 at 10:36:31
musetap
Audiophile

Posts: 31874
Location: San Francisco
Joined: July 8, 2003
Contributor
  Since:
January 28, 2004
a
"Once this was all Black Plasma and Imagination"-Michael McClure



 

Summer of 1991, posted on May 19, 2020 at 16:56:41
Luminator
Audiophile

Posts: 7331
Location: Bay Area
Joined: December 11, 2000



Sometime during the Spring 1991 semester, my friends (some, like me, were in college, but the rest were still in high school) and I saw Bay Area rock band Heathen at The Stone in San Francisco. It was empty! Anyway, Heathen were supporting their new album, Victims Of Deception, which was (and still is!) critically acclaimed, as a shining example of progressive metal.

As the school year was winding down, my friends went to Golden Gate Park, to play softball. For whatever reason, we were low on energy, and were getting outplayed. On the bench, my late friend Skull popped in the new Heathen CD into my Sony D-10 Discman, which fed a boombox. The technical thrash of "Hypnotized" woke us up, but instead of playing some more sports, we just took a walk.

When the school year did end, my family packed up, and went to Honolulu, our second home, and where most of my relatives lived and still live. Of course, one of the first places I wanted to visit was the late Stewart Ono's (UncleStu52 here on AA) Audio
Directions Ltd., then located on Waialae Avenue, near the Palolo McDonald's. The store was strewn with electronic parts and papers, and on a shelf was a stack of CD Greenbacks. At a $1.50 each, less than a shave ice, why not?

In practice, the CD Greenback is safest on CD transports with a spindle. And that included the Sony D-10 Discman. On the trashy-sounding D-10, the CD Greenback's slight reduction of hash was welcomed. Some of my old audiophle friends liked what a CD Greenback did, in their Pioneer Stable-Platter players. And I liked the CD Greenback more in the Theta Data Basic, versus the Cal Delta, both of which had drawers. Do not use a CD Greenback in slot-loading drives.

Interestingly, a short blurb about the CD Greenback would appear in the February 1993 issue of Stereophile. See pages 175-176.

-Lummy The Loch Monster

 

RE: Summer of 1991, posted on May 21, 2020 at 16:01:02
alan m. kafton
Manufacturer

Posts: 5285
Joined: April 7, 2000
I used the CD Greenback for a good while, until I tried the Marigo Audio CD mat....much better all around, and thin. Marigo since made improvements, including an even thinner mat (which I still use), and their website shows even newer, enhanced versions. Might be time for an upgrade. Ron Hedrich is a physicist and a very smart cookie. His products work.

 

RE: Summer of 1991, posted on May 23, 2020 at 23:10:55
hawaiiguy
Audiophile

Posts: 154
Location: island of Oahu, State of Hawaii/USA
Joined: July 17, 2001
could you show us the blurb about the cd greenbacks?

 

February 1993, posted on May 24, 2020 at 01:58:28
Luminator
Audiophile

Posts: 7331
Location: Bay Area
Joined: December 11, 2000
1991 was the final time I got to spend the entire summer in Honolulu. Back then, ADL was just a 15-minute walk from my grandparents' place near UH. But that's in the blazing Hawaiian heat. That summer, I idiotically took Intermediate International Economics at UH. The thought was that, by taking this hard classin the summer, I did not have to take it, back in UC Santa Cruz. Dumb, dumb, dumb. If you are going to take summer school in Hawaii, take something fun!



By the time my kids were born, ADL was on Algaroba, not far from Waiola Shave Ice and the McCully-Moiliili Library (above).



Anyway, in the February 1993 Stereophile, Jack English wrote a little about the CD Greenback. Again, it worked wonders in the trashy-sounding Sony D-10 Discman. In fact, for most of the 1991-92 school year, that D-10 was our CD source in the college apartment. Most visitors (and these were non-audiophiles) felt that the CD Greenback made the D-10 sound a little less hashy. The CD Greenback also worked well in the top-loading Simaudio Andromeda, which we had in the latter half of the 2000s.



It was one thing to read UncleStu52's posts, here on AA. But it was leagues better, to have gone to ADL, seen the mess (which meant Stu was doing lots of experimentation), met Stu, watched him do his thing, and observe for yourself, if his tweaks made any difference.

 

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