Nice
Here you have my actual setup.....
Very nice RCruz.
Initial impressions. I came home with a RIAA. It wasnt the Simplistic
Brother told me to get the best componenets I could. I will be looking at Auricap or Multicap, leaning toward Auricap. I am considering going with Rush's DCB1 output, As we want to use Vcap in the output and 2uF Vcap is borderline crazy. I have not put it on test bench officially, but It is very quiet. It is my hope that we are reaping the rewards of the SMD parts and excellent design of Salas in both the Shunt and Riaa stages. I want to try to find the 369, as I want the lowest noise option. Any help here is appreciated.
What can I say, Salas. Another winner. I may pick your brain about layout to make sure it is not an issue in terms of noise. Thid thing deserves a concentrated layout attempt. It will only get better.
Last edited:
See to sort out the hum issues first, box it up in metal and use coax for signal. Tx & rectification in separate box. Even with new lytics its the hum that adds low freq harmonics and sounded kinda squat. Good start nonetheless. 60dB totally quiet phono ain't easy in the open, so far so good. Congrats.
I want to try to find the 369, as I want the lowest noise option. Any help here is appreciated.
Salas,
Any way to use 12 mA idss 369? I have a pair at 12 I would like Buzzforb to use, if you could make the circuit work for that high idss. Is it a whole new design?
Rush
Salas,
Any way to use 12 mA idss 369? I have a pair at 12 I would like Buzzforb to use, if you could make the circuit work for that high idss. Is it a whole new design?
Rush
You could up the Rs until it runs ~9mA in the same circuit.
Hi buzz... this folded version picks up like an antena.... enclosure is a must.... I use copper case but iron is also very good.
My builds are totally silent.
Not in our test, it was the same like the telescopic with open lid in same box, psu and grounding arrangement. Had no hum or buzz. It will pick up from a contaminated ground as much as a telescopic from a contaminated rail. There is no high gain phono we can afford to roughly test unpackaged and expect no hum nonetheless.
No worries. Amps lab has some. I'll just get the there, although I do have a question. I believe you said a single 369 beat dual 170's. what about distortion? I would think dual 170's would have better linearity than single 369.
The 369 will beat them below 300Hz only. Gate capacitance is roughly the same for one 369 and two K170. You will lose 1.5dB gain with the single 369 in this circuit.
P.S. Having two positions already its easy to check one or the other config.
.I knew it would be susceptable to hum. I am taking big donut over there today. It may not help much, but the hammonds hummed right out of the box.
Use distance.
Salas,
redesigining everything and working on the PSU. I am going to have the Toroid in a seperate case, with shielded umbilical bringing the secondary voltage into the main case. I am unsure of how to ground the main case to earth. I will bring earth in the umbilical so the case can be grounded. Just wandering if I just run a wire from the prereg ground to earth ground, sperated by dual diodes. Any suggestions on wire up for quiet ground?
redesigining everything and working on the PSU. I am going to have the Toroid in a seperate case, with shielded umbilical bringing the secondary voltage into the main case. I am unsure of how to ground the main case to earth. I will bring earth in the umbilical so the case can be grounded. Just wandering if I just run a wire from the prereg ground to earth ground, sperated by dual diodes. Any suggestions on wire up for quiet ground?
- Home
- Source & Line
- Analogue Source
- Simplistic NJFET RIAA