I got a Harman Kardon T35C turntable a while back after seeing HK turntables on Ebay and reading about them. IIRC, it wasn't much over $200 from Ebay. The T35C has low rumble, wow and flutter and after I tried playing a record on my unmodified T35C, I noticed a steadiness in the sound which was a definite improvement over some other turntables I was using. As a comparison, when comparing a Foxtex model 80 1/4 inch reel to reel 8 track to my Akai CR80DSS, I noticed that after cleaning the Fostex and using rubber bands on the tape guides, the Fostex seemed to produce a very steady and smooth sound when I tried playing the TUBES tape, compared to using the Akai CR80DSS (must be the low wow and flutter of the Fostex).
See https://www.quadraphonicquad.com/forums/showthread.php?16203-Reel-to-reel-Frankenquad!
Recently, I tried taking the original cable off of the T35C and put a brass plate on the back of the turntable having two gold plated phono jacks (pictures attached). The jacks are soldered to two pieces of RG187A/U cable which I soldered to terminals inside the turntable that connect to the wires coming from the tonearm. The original tonearm wires were not replaced. I also put in a new ground wire.
see https://www.quadraphonicquad.com/forums/showthread.php?15988-Silver-tonearm-wire
I connected the phono jacks to a TC-750 preamp using two half foot pieces of RG187A/U cable with gold plated phono plugs at each end (with a Fisher 500C tubed stereo power amp, Masco inspired stereo dynamic range expander and OFC cables after the preamp and expander and 10 gauge OFC speaker cables) and played some stereo records using an Audio Technica cartridge and could hear a big improvement in the sound, ie. clearer with more dynamic range. Later, I tried using a Pickering XV-15 cartridge with a couple different styli and the sound seemed to be less distorted than the Audio Technica cartridge (the AT sounded like it produced a fuzz or buzz effect on the peaks). I used a gauge to align the XV-15, but not the Audio Technica. Also, the Audio Technica stylus might be dirty (I didn't use liquid cleaner, only a dry brush) and/or may be wearing out. Later, I tried using a Pickering XUV/4500Q which I got recently (the seller says its barely used) and one Sunday afternoon listened to a lot of records while being amazed at the sound (very clear and detailed yet musical and warm). :banana: Sounds like they used some backward tape effects on the 12 string Rick on Eight Miles High by the Byrds, which I never really noticed before. I also found that a lot of styli that fit and work with the XV-15 will fit into the XUV/4500Q but don't seem to work right, ie. sound level is very low. Only the 4500Q works right with it. Soon I'm going to try it with the Fosgate Tate for SQ and Sansui QC-04 for CD-4.
The Fisher X-101 I've been using with the rear speakers makes some noise in one channel, so I might have to fix that soon. I have some other amps I could use for the rear speakers, too.
Masco circuit (fig. 5) http://antiquesci.50webs.com/CompExp.htm
http://articles.chicagotribune.com/...ternal-vibration-turntable-four-spring-loaded
http://www.vinylengine.com/library/harman-kardon.shtml
See https://www.quadraphonicquad.com/forums/showthread.php?16203-Reel-to-reel-Frankenquad!
Recently, I tried taking the original cable off of the T35C and put a brass plate on the back of the turntable having two gold plated phono jacks (pictures attached). The jacks are soldered to two pieces of RG187A/U cable which I soldered to terminals inside the turntable that connect to the wires coming from the tonearm. The original tonearm wires were not replaced. I also put in a new ground wire.
see https://www.quadraphonicquad.com/forums/showthread.php?15988-Silver-tonearm-wire
I connected the phono jacks to a TC-750 preamp using two half foot pieces of RG187A/U cable with gold plated phono plugs at each end (with a Fisher 500C tubed stereo power amp, Masco inspired stereo dynamic range expander and OFC cables after the preamp and expander and 10 gauge OFC speaker cables) and played some stereo records using an Audio Technica cartridge and could hear a big improvement in the sound, ie. clearer with more dynamic range. Later, I tried using a Pickering XV-15 cartridge with a couple different styli and the sound seemed to be less distorted than the Audio Technica cartridge (the AT sounded like it produced a fuzz or buzz effect on the peaks). I used a gauge to align the XV-15, but not the Audio Technica. Also, the Audio Technica stylus might be dirty (I didn't use liquid cleaner, only a dry brush) and/or may be wearing out. Later, I tried using a Pickering XUV/4500Q which I got recently (the seller says its barely used) and one Sunday afternoon listened to a lot of records while being amazed at the sound (very clear and detailed yet musical and warm). :banana: Sounds like they used some backward tape effects on the 12 string Rick on Eight Miles High by the Byrds, which I never really noticed before. I also found that a lot of styli that fit and work with the XV-15 will fit into the XUV/4500Q but don't seem to work right, ie. sound level is very low. Only the 4500Q works right with it. Soon I'm going to try it with the Fosgate Tate for SQ and Sansui QC-04 for CD-4.
The Fisher X-101 I've been using with the rear speakers makes some noise in one channel, so I might have to fix that soon. I have some other amps I could use for the rear speakers, too.
Masco circuit (fig. 5) http://antiquesci.50webs.com/CompExp.htm
http://articles.chicagotribune.com/...ternal-vibration-turntable-four-spring-loaded
http://www.vinylengine.com/library/harman-kardon.shtml
