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RE: Marantz AH! Tjoeb '99 Cd-38 tubes

Posted by Sondek on December 6, 2024 at 11:31:50:
I have been very pleased with the service I've received at The Tube Depot. There are certainly other vendors, but have been dealing with TD for several years and never disappointed.
FWIW, I got significant improvements from my AH! with a few simple tweaks. Most of that from damping the 'rings like a damned bell' sheet metal cover. Some Dynamat, or better yet, some of those viscoelastic damping sheets they used to sell at Music Direct. Some Blu Tack on the bottom (under side) of the CD tray to further damp internal vibrations - just a couple of little bits will do the trick. That plastic CD tray vibrates and rattles like crazy and the BluTack kills all those resonances. Just be careful not to put any where it might interfere with open/close of the drawer. Also, trash that POS captive power cord. Some better wire and a decent AC connector will do wonders. Finally, an upgrade to the internal fuse helps a bunch. I used a run of the mill HiFi Tuning fuse on mine - I've found those fancy fuses are more effective with digital gear than analog. Any one of these tweaks will advance the performance, but when they're all implemented together it lifts that humble player into another realm.
That's alls I got. Hope you find something in this you can use.
https://www.musicdirect.com/equipment/accessories/audio-additives-3m-damping-sheet-ea/