Yep That's it cubic! That's the big c8 cap. Amplitude was asking about the 1uF coupling caps, as was I at one point.
Thanks dirk, i have a Rubycon rx30 35v 470uf in that position . That should be around 1.6hz,.... Im no elephant
Five minutes later.... Looks like a ten time smaller capacitor, 47uf will roll of 3db at 15hz
Five minutes later.... Looks like a ten time smaller capacitor, 47uf will roll of 3db at 15hz
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@Boydk: Impressive indeed as your Orff opera is, would suggest, in the nature of a good-tempered WAR, that the Jochum Bruckner is way more dramatic (on a purely audiophile level). See the JPeg below.
Now your audio system and its extreme quiet is, admittedly, sans pareille.
Searched through my opera vinyl and was able to find the sister Orff opera, Der Mond (another JPeg). Will get around to checking this out today.
Now your audio system and its extreme quiet is, admittedly, sans pareille.
Searched through my opera vinyl and was able to find the sister Orff opera, Der Mond (another JPeg). Will get around to checking this out today.
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Boydk: Whoops (once again). Do have a copy of Die Kluge and while it is not the Kegel dirigent it is quite good -- Sawallisch and the London PO. JPeg attached. Takes me back to musicology days, sprechstimme style, and the changes opera underwent in the mid-20th century. Splendid dramatic bursts and I'm still going with the Jochum for the ultimate audiophile experience...
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Another successful build. Tested it at @SRMcGee's place as he has the closest TT I know of (and he's a swell guy.) It plays music quite beautifully. Vocals definitely have a certain something about them. Next stop is a short jaunt down to MD to set it up in a friend's system.
Well, I don't know about fantastic. Certainly decent enough.
Take a look at the measurements in posts 2202 2208 and 2781.
Gain on the "low" setting is 50.4dB, also see Eq curve.
The LF roll off is greater than the pure RIAA specified equalization curve. There is a bit of rumble filter, IEC Amendment designed into the Pearl 3.
I am still tempted to purchase a MC cartridge.
Thanks DT
@DualTriode : Your helpful post and info shows this thread acting in the best way -- fine minds sharing with good intentions. Thanks.
Have got all of the test stuff in place or coming in. Will be using a simple setup with a studio quality RME UCX converter, a noiseless attenuator, Hagermann's iRIAA2 filter, and, on the computer, REW and a spectrum analyzer. Am just getting into the latter and this will take a bit of trial and error.
Your info in posts 2202 and 2208 shows the expected FR with a much-expanded *.25 dB vertical scale -- impressive results. The added bass rolloff is good to know about ahead of time. The 1khz distortion results will be easy to produce and I look forward to comparing my build with your results.
Should have some results by mid next week. Will only be reporting on my build which has the dual PSUs (with custom amphenol 6-position cable), upgraded J112s, and the stock 2068 opamp for testing purpose. Have been using the onsemi 106-112 low noise Jfets for a week now and they have grown on me considerably. Grataku should be producing his own assessment of this upgrade soon.
As regards cartridges, only use MC ones myself as they are required for quality classical music repro. The Hana MC/ML is a superb device and is worth its high cost ($1200) but just barely. Hate buying cartridges because they start depreciating immediately and are prone to no end of setup and maintenance issues.
My three Pearl 3s operate at 70dB with the jumper removed and have less distortion and feedback than the MM option. Will be replacing the spare unit's SMDs with a matched set of 8 once the measurement project is completed and look forward to seeing if that has the same dramatic difference that a matched set of transistors did for the BA2018 preamp.
Have got all of the test stuff in place or coming in. Will be using a simple setup with a studio quality RME UCX converter, a noiseless attenuator, Hagermann's iRIAA2 filter, and, on the computer, REW and a spectrum analyzer. Am just getting into the latter and this will take a bit of trial and error.
Your info in posts 2202 and 2208 shows the expected FR with a much-expanded *.25 dB vertical scale -- impressive results. The added bass rolloff is good to know about ahead of time. The 1khz distortion results will be easy to produce and I look forward to comparing my build with your results.
Should have some results by mid next week. Will only be reporting on my build which has the dual PSUs (with custom amphenol 6-position cable), upgraded J112s, and the stock 2068 opamp for testing purpose. Have been using the onsemi 106-112 low noise Jfets for a week now and they have grown on me considerably. Grataku should be producing his own assessment of this upgrade soon.
As regards cartridges, only use MC ones myself as they are required for quality classical music repro. The Hana MC/ML is a superb device and is worth its high cost ($1200) but just barely. Hate buying cartridges because they start depreciating immediately and are prone to no end of setup and maintenance issues.
My three Pearl 3s operate at 70dB with the jumper removed and have less distortion and feedback than the MM option. Will be replacing the spare unit's SMDs with a matched set of 8 once the measurement project is completed and look forward to seeing if that has the same dramatic difference that a matched set of transistors did for the BA2018 preamp.
To close this loop, I landed on 620R for both channels once I could do math correctly, which yields 4.2mA and 4.7mA, respectively per channel. Admittedly I listen to weird stuff but tbh it sounds different than I remember now, and very fun. If you haven't bothered to tune your Iqs, I highly recommend.
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P3 question: mine is great, silent, sounds great. Those of you that have seen me on Zenmods xa252 thread know I blew mine up by fumbling fire up of P3.
Amp and pre were both on. Unfortunately I got lazy and did not double check preamp was on mute selection (iron pre) knob. Not only not on mute, but ON phono selection.
Upon flipping the P3 on, a tremendous whack noise and two puffs of smoke from R24 region. I figured, and indeed did make a Titanic turn on mistake, but is it normal for this bad of a transient to come from P3? I assume it is, the thing works great and dead silent....but for best sleep thought I may inquire on this. I have never done this before with a phone pre and sure don't want to try.
Please don't try this!
Amp and pre were both on. Unfortunately I got lazy and did not double check preamp was on mute selection (iron pre) knob. Not only not on mute, but ON phono selection.
Upon flipping the P3 on, a tremendous whack noise and two puffs of smoke from R24 region. I figured, and indeed did make a Titanic turn on mistake, but is it normal for this bad of a transient to come from P3? I assume it is, the thing works great and dead silent....but for best sleep thought I may inquire on this. I have never done this before with a phone pre and sure don't want to try.
Please don't try this!
What did you do to cause this? You should be able to turn your things on every which ever way you want w/o things blowing up.
Did the xa252 blowup or the P3?
The only way that r24 res would smoke is a short in the output follower. this is very strange.
I noticed there is a turn on/turn off thump on the P3 but I am not super worried about it. I turn the volume down.
Did the xa252 blowup or the P3?
The only way that r24 res would smoke is a short in the output follower. this is very strange.
I noticed there is a turn on/turn off thump on the P3 but I am not super worried about it. I turn the volume down.
Hello everyone. I am new b. I just finished my project and I am trying to understand why I have this reading at the LED terminal (-21.7 v). Yet, the resistor R26 should lower the voltage? I have the same reading at both channels. Where did I go wrong? Thanks in advance.
