Simplistic NJFET RIAA

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Joined 2009
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Obviously the IDSS of your Q3x Vref biasing JFETs falls somewhere between usual R3x value matches for providing balanced enough target trimming range.
Engage VR1 from this point on and try for 3.6V TP1/2. If it again won't reach you may use 8.2K for R3x pursuing extra DC Rail bottom range but you are not in unacceptable readings area already.

Thank you Salas that did the trick:D 3.6V has been achieved so I am letting the FSP warm up for a while to make sure nothing drifts to far;then it's wire the phono's in and have a listen.Thanks again.
 
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Joined 2006
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Too quiet here

I want to hear more about Marra's adventures in Decca land! How is it sounding? I have a fondness for Deccas ever since I heard one properly set up, in a shop I worked in a long time ago.

For my own adventures in Denon land, I have been listening with 220R load resistors (I think I mistakenly said 200 ohms in a previous post). The top end sounds a bit smoother, and everything has a more "solid" or "together" sound, if that makes sense. Or maybe I'm fooling myself. Either way, the changes are subtle. I was hoping it would change the bass more, but I think a slightly "light" or "lean" bass presentation is just how this cartridge sounds. Not bad, and the low notes are there, just not as fat in the bass as my AT MM. Possibly more accurate.

Oh, it seems like the cartridge output might be a bit higher into the lighter load, I feel like I'm not turning the volume knobby up quite as far. Which leads to the next change; I will listen for another week or two, then replace the gain-setting resistors to lower the gain a bit.

Will we see more new builds soon?
 
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Joined 2002
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I want to hear more about Marra's adventures in Decca land! How is it sounding? I have a fondness for Deccas ever since I heard one properly set up, in a shop I worked in a long time ago.

For my own adventures in Denon land, I have been listening with 220R load resistors (I think I mistakenly said 200 ohms in a previous post). The top end sounds a bit smoother, and everything has a more "solid" or "together" sound, if that makes sense. Or maybe I'm fooling myself. Either way, the changes are subtle. I was hoping it would change the bass more, but I think a slightly "light" or "lean" bass presentation is just how this cartridge sounds. Not bad, and the low notes are there, just not as fat in the bass as my AT MM. Possibly more accurate.

Oh, it seems like the cartridge output might be a bit higher into the lighter load, I feel like I'm not turning the volume knobby up quite as far. Which leads to the next change; I will listen for another week or two, then replace the gain-setting resistors to lower the gain a bit.

Will we see more new builds soon?

Denon "300" series is bit light-footed vs the "100" series in my experience, but tracks better. At your level, next cart real step means spending $1000-2000.

To see more new builds, some new people waiting for the belated next GB must get pcb. Finishing in the next couple of days with the Reflektor-D documentation (a regulator focusing on DAC voltage range) that I wanted to include in the GB also, and I will give the go to Tea-Bag.