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RE: Tweeter difference problem with 3.3Rs and more

The PLLXO and pots:

The LP will be about 3 db quieter than the HP, and you can only make it quieter if you don't have a gain stage. So either you need to adjust on the top or adjust both, but the available adjustment range on the LP side is limited on the up side relative to the HP portion. If you keep the adjustment on the HP portion (or on both) then you will have a high enough impedance for a tube preamp. The minimum of the dual control arrangement, or the control on HP only would be 15K.

If you use a 2K2 resistor than you need to use a 200nF cap - I did not find a Wima at 0.2uF but you are welcome to try finding a combo of foil cap and resistor that works. R should be 2000 +10%/-20%, and R*C (ohms and uF) must be 440 +/-5%.

I think the detachable headshell is very convenient, and the precision of the arm is far better than the Rega. The problem is the cable and the resonance of the constant diameter tube. So damping the tube is a good idea. When you have it rewired, have the integral RCA cable taken out too, and have it replaced with the continuous run from the headshell connector to the RCA plugs.

I have headshells from different turntables, arms and extras bought separately. I have a Technics graphite shell, one from a Jelco arm, the original from the 1600, and one from a Sansui 929 that was damaged in shipping. Terrific arm, but the bearings were bashed in. Has an all metal VTA on the fly, very precisely built. The 929 was a great deck too, but mine was damaged beyond repair. I also have a Lenco 78 waiting for me to finish the new plinth, a pioneer DD, and two Oracle Decks, an Alexandria II and an original Delphi with burnt out motor (or rather without since I threw it out), some day it might get the DC motor I was intending on getting for it, or I'll sell or trade it. The Alexandria is on the way out either with a Jelco Arm or the modified Prelude. The headshell in the pic is from the Sansui.

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  Kimber Kable  

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