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Everything posted by luvdunhill
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I am sure that rating is generous as well
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The advantage would be the ability to use my existing phono pre or the RIAA eq and in either case, be able to do digital conversion. I don't need any gain when using my external phono pre. I am doing a firmware flash as we speak and hopefully playing with this and some room measurements this weekend.
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@ironbut Would it be possible to run my turntable into the balanced line inputs and then my phono pre though the analog inserts. Then I could set the line inputs to zero gain and engage the inserts to run through my existing preamp or disable the inserts to use the ULN-2 as phono pre?
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I may take you up on that. Just ordered an LP so I have a shipping container. I think I have a channel imbalance. I swapped out my preamp 6SN7 (single gain tube for both channels) to a Ken-Rad black glass and things moved a bit to the right (and got a bit fuzzier). I need to make a few measurements, but too lazy now. I stuck the offending tube in a cheap B&K 600 and both sections showed about the same amount of "green" on the scale, but not sure if that means anything. The output is a split load inverter to convert to balanced - again a single tube for both channels. Not sure if an imbalance could develop here or not.
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I consistently abuse the ratings as well. Using a 18VAC transformer with 25V caps on both sides of the CRC. The final voltage is around 26V or so. I bought some Nichicon caps and just didn't want to attempt the same scenario.. reason being, in the 25mm diameter you go from 22mF to 15mF if you go up a rating. Don't try that at home though.
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Generally - OnlineComponents is nice for more expensive items.
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Your lingual dexterity is amenable
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I am a big fan of Panasonic snap-in capacitors, such as TS-UP and TS-HA. Sadly these are no longer being sold. As it turns out, OnlineComponents has a number of popular values in stock, including the 22mF 25V and 15mF 35V. So I bought some. You should too.
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I have a PCB for the front power switch that mounts a LED in the proper spot, the rear quad RCA which breaks that into a header and a rotary switch for the knob that allows remote control of relays and some LED indication on which state the knob is in. I can post pictures this weekend.
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That sucks. Those guys have been pretty easy to get a hold of in the past too. I have some small PCBs to use on the various switches and I/O jacks somewhere - if anyone wants them I can find them. Also, if you have extra pieces from that fourth chassis, I would be interested if shipping is cheap. One other piece of advice - use a smaller washer on the toroid. This picture will give you a hint why: (yes, that piece of copper is not insulated)
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Here: http://www.vt4c.com/shop/program/main.php?cat_id=1032&group_id=2&hit_cat=
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I have a phono stage project in that case - it's rather nice!
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CLOSED: Alpha/Song Huei Potentiometer Group Buy and TKD Attenuators
luvdunhill replied to cspirou's topic in Do It Yourself
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Agreed. My room isn't really symmetrical so the room mode theory could fit? I want to swap channels and see what happens. Oh and get the SACD version (which is OOP?).
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Ok, thanks. I think something odd is going on here, just need to figure out how to diagnose it.
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That is possible. I need to setup a measurement microphone for that though. I don't like that I can hear the transition down the horn, but other tracks don't seem to accentuate that. Perhaps another recommendation of a similarly mic'ed / composed group I could compare with? Would you at least say it's "unbalanced" compared to the other ensemble parts?
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In that case, you are loosing a ton of transconductance with that configuration in order to gain Vds. The question is whether the resulting Vds puts the device in is linear range (I assume so with KG's designs). TL;DR A super high Idss puts Vds around 5V to stay within power dissipation limits which isn't a all that linear operating point for these devices. Adding degeneration resistors adds noise and reduces voltage swing.
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So, my question is: is the bass-line way too overbearing to the point of being unnatural? I love the ways the drums are recorded - they are spot on and sound amazing on my setup. Very realistic. But the bass is hard panned left and just is "distracting". Now I have some system things going on around these frequencies and the top end of the bass (the high notes) comes though my top horn and the the bottom though the back-loaded "bottom" horn. I have tried a few other recordings (though no other Bill Evans Trio) and this one stands out as either sounding "unnatural" or just flat out "wrong".
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What is the canonical Ghost in the Shell order? Starting from start to now?
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Many times I have wanted to ask someone to listen to a recording and compare a few notes, mostly around system "voicing" and dialing things in. So, we will see if there is interest to help. First request is Bill Evans "Waltz for Debbie" APJ 009 (vinyl). If you have a different format or mastering, then that could be interesting as well.
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The reason is power dissipation. Folks run the devices at full Idss and when you do that and look at the range of rails required to stay under SOAR curve, the V devices aren't preferred. You can use V devices, but need to add degeneration resistors (which reduce voltage swing), which your design / layout might not have locations for.
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What about this Shelly? http://www.teac.com/product/pd-501hr/