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Old 12th July 2011, 03:01 AM   #291
Carlp is offline Carlp  United States
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Anyone have experience with this AND the HagTech Bugle using the same opamps in both? I am considering a tube phono stage (e.g. the updated RCA or even, horrors, an active RIAA design) vs this one as my next project. I have the Bugle now (I've rolled it with a number of opamps but NOT the 627/637) and find it quite nice (silent as can be!) though not crystal clear and nothing exceptional to write home about. Just overall very nice. A comparison might help me decide what to build.
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Old 16th July 2011, 08:14 PM   #292
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Can R7 be 100R instead of 47R?
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Old 16th July 2011, 09:21 PM   #293
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Quote:
Originally Posted by Tea-Bag View Post
Can R7 be 100R instead of 47R?
Yes, no problem at all.
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Old 16th July 2011, 10:34 PM   #294
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Thanks!
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Old 20th July 2011, 07:03 PM   #295
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Why change it? Mine is removed completely, as it is supposed to sound more "open".
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Old 20th July 2011, 07:31 PM   #296
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Why change it? Mine is removed completely, as it is supposed to sound more "open".
I have a nice 100R caddock, and only crappy 47R's.

I guess if I remove the resistor and jumper, and I don't have it hooked up, I will likely cook something - if I read the thread correctly.

Not a chance I want to take.
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Old 20th July 2011, 07:44 PM   #297
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I next install rectifiers and main filter caps. MUR860 is my preferred diode but of course other types can be tested here as well and to make things easier I marked pads with K and A. BG STD 1000/25 work very well as main filter caps in a phono circuit (better than any other BGs). Alternately, Panasonic FC or Elna Silmics could be also considered.

I'm getting approx 19V DC after smoothing and under full load.
I just noticed that Nichicon Muse is not on this list. Are Silmics preferred?
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Old 20th July 2011, 07:57 PM   #298
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Quote:
Originally Posted by Carlp View Post
Anyone have experience with this AND the HagTech Bugle using the same opamps in both? I am considering a tube phono stage (e.g. the updated RCA or even, horrors, an active RIAA design) vs this one as my next project. I have the Bugle now (I've rolled it with a number of opamps but NOT the 627/637) and find it quite nice (silent as can be!) though not crystal clear and nothing exceptional to write home about. Just overall very nice. A comparison might help me decide what to build.

I used the bugle years ago - I think it was the first phono stage I had that wasn't part of my preamp...And I can definitely say that the bugle is nowhere even close to being in the same league as this phono stage. I haven't really done an A/B comparison, although the bugle is somewhere amongst my forgotten equipment, but over the past few years I have had a successive improvement in phono stages, going from the Bugle to the Lehman Black Cube, to the ARC PH3SE and finally to this one. In each case there was a definite improvement in clarity, dynamics and overall 'rightness'...
This phono is detailed, uber-dynamic, and crystal clear. IMO it competes with some of the best phono stages out there.
Of course, this all comes with the caveat that you have an appropriately low impedance cartridge. I am using the Lyra Delos at ~8 Ohm (I think) and it sounds fantastic...the 38 Ohm Dynavector sounded good as well, but because I was using a passive preamp I didn't get enough gain to properly judge its' performance.
Build it - it is a simple build, and you will not regret it!
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Old 20th July 2011, 07:59 PM   #299
BigE is offline BigE  Canada
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Byron,

Did you use R7?
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Old 21st July 2011, 01:25 AM   #300
Carlp is offline Carlp  United States
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Quote:
Build it - it is a simple build, and you will not regret it!
Byron
Thanks Byron. That's pretty convincing (not that I was expecting a different answer) though I'd love to hear from others. More importantly, being a die hard cheapskate and scrounger, most of my DIY equipment as been built from parts bin scraps pulled from dead equipment, computer monitors, etc. etc. So...anyone build it from parts other than the specs? Most importantly the V-Caps, boutique resistors and opamps (particularly opamps in the power supply - are 627/637 really needed there?)?

I don't want to get into a pi**ing match about whether these parts matter in general. Just wondering if there are any el cheapo builds of this preamp out there and how do they sound? I'd probably start by rolling opamps that I have before shelling out for the 627/637s anyway. So any thoughts would be helpful. A recent job change and reduction in income forces my hand a little on this one.

So, put another way, how would you build this preamp on the cheap?

Thanks again,
Carl
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