hiho

Responses from hiho

Vintage DD turntables. Are we living dangerously?
For a long time I agreed that the tonearm and the platter should resonate in unison to avoid added distortion. But after reading about good results from the separte armpod approach, I started to question my original thinking. I realized the tightl... 
Why so few balanced phono inputs?
As long as the ground wire is not touching the cold side of the RCA connector, the signal is still "balanced". It's how you wire it not what connector is used. An XLR connector has 3 pins: hot, cold, and ground. If you use RCA, the shell is cold a... 
Brinkman Spyder review- anyone hear it?
"Slightly on the warm side, and a very analog sound.""but to my ears, quite different than it's DD sibling." "The Bardo is a nice table, just not my cup o' tea." Does that mean the Bardo is not as analog sounding? By the way, the Spyder uses a mo... 
LCR phono stages we know about
Lewm: "Note however that the RTP is rather unusual in that there is no second gain stage after the RIAA (It's not needed because that hybrid dual differential cascode at the input develops tremendous gain by itself); nor is there a cathode followe... 
LCR phono stages we know about
Here's one example from a Wright circuit. As you can see, there's no series resistors, the output impedance is the invisible resistor. The downside of such circuit is that tube aging can affect plate resistance and therefore R's value and RIAA acc... 
LCR phono stages we know about
But I really do not know how one can avoid having either an R or a C in the series signal path and still get to proper RIAA equalization.Any tube gain stage has its inherent output impedance which can act as the invisible series resistor R in the... 
LCR phono stages we know about
One difficulty in using higher impedance LCR is that the inductance of the choke will be higher accordingly which is harder to wind. You gain some you lose some. . 
LCR phono stages we know about
Perhaps the 600 ohm "standard" stems from the pro side when making records in applying RIAA EQ, which was made using LCR network, inverse curve of course. . 
LCR phono stages we know about
Audio Note UK also makes few models of phono preamps that employ LCR network. Typical LCR network is sandwiched between two gain stages with the first stage being able to drive low input imepedance, typically 600 ohms like the Tango circuit, so a ... 
Vintage DD turntables. Are we living dangerously?
Re-posting the diagram by the RS tonearm designer if it heps: RS-A1 tonearm set upGood luck!. 
Vintage DD turntables. Are we living dangerously?
Instruction on setting up the RS-1A tonearm using underhang scheme. I believe the arm uses the tangential point (or reference point) right in the middle of the platter which is 3 inches away from the spindle about 76mm radius. "Structure & Fea... 
Vintage DD turntables. Are we living dangerously?
08-28-14: Lewm:"What bothers me about it is the question of whether the pivot is really held "Rigid" by the floating bearing arrangement. I don't see how it could be. "In the August 2014 issue of Stereophile, Michael Fremer reviewed the tonearm an... 
Vintage DD turntables. Are we living dangerously?
Thank you for the kind words, Halcro. As a person with limited means, I'm more of a daydreamer than a "thinker." As for the "doer" part, I've been really lazy lately so I am more of a slacker. There you go, I'm a daydreaming slacker bum! :) I didn... 
Vintage DD turntables. Are we living dangerously?
Halcro, I understand your concern and it is a valid one. When I used a DD table to drive a passive platter, I had to use the speed control and that required defeating the quartz lock feature to be at variable pitch since the two platters are not i... 
Vintage DD turntables. Are we living dangerously?
For those who have a JVC TT-101 should check out this YouTube video. DIY thread drive turntableLooks like someone turned the TT-101 into a belt drive motor! Using string or thread that has no compliance, it retains the accuracy of the direct drive...