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  #106 (permalink)  
Old 11-12-2008, 02:23 PM
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after few post here ,I think what I need is the OPA EARTH ,only one more question before I order it ,what is the difference between OPA-EARTH Dual OPA and OPA-EARTH Single OPA ?,thank
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  #107 (permalink)  
Old 11-12-2008, 02:47 PM
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One is single-channel the other is dual-channel, you need the dual.
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  #108 (permalink)  
Old 11-12-2008, 09:31 PM
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Quote:
Originally Posted by leothan View Post
Thank for your advise ,Yeb ,I don't intend to use the zero as HP amp ,just use it as preamp for my LD MKIII ,the HP that I am using is HD600 ,i prefer the sound more neutral ,so U think the Earth is the best choice ? How many I will need to replace and how it can be done ?
Thank alot
No worries, buddy, you need just the one HDAM and I think you'll find the OPA Earth and ideal match for those 600's. Check with Penchum, leothan, as he has a set and I don't, I use 650's. Maybe with PP and others too. Heck, you might go gaga over the OPA Moon with them! One great thing with Kingwa at audio-gd is that they have special deals where you can 'buy 1 get two others free' sort of thing. I've got a great mix of parts that way.
Yes, if it's neutral you prefer, go Earth, you won't regret it. You just gently pull the op-amp out of the DAC on the right hand side of the case, looking from the front and pop the HDAM in place of it, making sure that the half moon on the bottom of the HDAM is facing to the back of the case, matching the half moon cut-out on the op-amp base. Solder your ground wire to the RCA output jack's ground leg and you're away. Now, I realise that you may want to lay your HDAM flat inside the case, instead of having it standing up directly in the socket, as I prefer, and so you will need a set of the extension cables that you will have to order with the HDAM, laying the unit on it's side between the amp and DAC board. There are pictures of this abounding on this site.

S-Man
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  #109 (permalink)  
Old 11-13-2008, 06:26 AM
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great ,thank alot ,I will try now
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  #110 (permalink)  
Old 11-13-2008, 07:48 AM
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Default snipping cap mod

Hi there guys!

Have someone of you tried the "cap snipping mod" cutting off those capacitors in the Dac and Pre-amp sections?

I'd like to do it but i fear bad consequences, like sound becoming TOO bright for my ears.... anyone giving me some advice?

i'm using a pair of HD-600 directly connected to ZERO.

Thanks
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  #111 (permalink)  
Old 11-14-2008, 08:14 AM
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I currently have the snipped HDAM Earth + LT1364 Zero, and it seems that the Burson mod is a natural next step, but when first ordering caps from ussr-tubes.com, I guess I might just as well get some for some of the other mods, like adding 0.033 ufs to the DAC chip.


So, in short, what do I get to do a FrankenZero Light?


Cheers
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  #112 (permalink)  
Old 11-14-2008, 07:18 PM
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Oops, sorry, early morning brain fade! See the next post, heh heh ...
S-Man

Last edited by sennsay; 11-14-2008 at 07:23 PM.
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  #113 (permalink)  
Old 11-14-2008, 07:21 PM
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Quote:
Originally Posted by fdbf View Post
Hi there guys!

Have someone of you tried the "cap snipping mod" cutting off those capacitors in the Dac and Pre-amp sections?

I'd like to do it but i fear bad consequences, like sound becoming TOO bright for my ears.... anyone giving me some advice?

i'm using a pair of HD-600 directly connected to ZERO.

Thanks
Hi fdbf, from what I can gather after months on the Zero thread, the cap snip (on the DAC board) may affect those headphones that are already a little bright up top, virtually everybody else has only found a benefit to be had by getting rid of them. I don't know of anyone else with either 650's, like myself and many others, or with 600's that has had any problems at all with the 'snip'.
You don't even have to pull the board. Only the ones at the back though, by the RCA output jacks. However, in your case, since you are not even using the DAC out to another amp I wouldn't bother yet, you can do that any time.

IF you mean the ones beside the op-amps in the Zero's amp, I'm not really a fan of just cutting them out, they usually have to do with the operational stability of the op-amp. They can be replaced for sure with better caps. I've actually replaced some in another amp of mine with slightly larger values to no ill effect - 100pF instead of 22 or 47pF. Just snipping what's there could lead to instability with some cans.
S-Man
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  #114 (permalink)  
Old 11-14-2008, 10:45 PM
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Quote:
Originally Posted by grkn View Post


So, in short, what do I get to do a FrankenZero Light?


Cheers
Follow the instructions in the FrankenZERO thread. Do an entire Phase...either 1 or 2 or 1 and 2 is my advice. I strongly suggest you consider and complete Phase's 1 and 2...that'll give you 90 % of the Frankie's sound sig...if you use the H/Amp section for your amp then 1 2 and 3 are worthwhile. In which case a kit from me makes more sense cost wise. Your choice of course.

Sourcing the PIO caps can be tricky......do not buy any caps with a diameter of more than 8mm....otherwise they will not fit under the pcb. As it is the 8mm caps need to be oriented a certain way to allow the pcb to reinstall without issue. This narrows your choice of cap considerably.

Use Sennsay's excellent assembly guide and pics for additional tips, bypass cap orientation pattern and general help.

Peete.
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Desktop amps : LD MK III (6H30P-i DR's + DIY mods, Jaycar DIY kit amp (major DIY mods), 2 X Audio-gd Compass (test prototype,final version), Audio-gd C-2C W/ Stepped pot Upgrade, Audio-gd Phoenix SS balanced preamp/headamp.
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Sources: FrankenDAC DIY 24/192 dac (HDAMs/Teflon/PIO cap mod), Compass DAC, See Corp Vintage UK TT(Mission arm/Ortofon OM20S MM cart), Yaqin MS12B tube phono preamp, TEAC V530X Tape deck, Audio-gd Reference 1 DAC. C2C DIY pot mod http://www.head-fi.org/forums/f6/ste...1/#post5846722
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  #115 (permalink)  
Old 11-16-2008, 05:15 PM
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Hey, I have two silly questions. On another forum they suggest getting 3 HDAMs for the Zero. On the Introduction page by Currawong it says "as the ZERO doesn't have enough grunt to power 3 HDAMs." Any chance someone could clear this up for me? How many HDAMs do I get? And assuming getting 3 isn't the worst idea ever, it would be stupid to have say, 2x Moon 1x Sun in one Zero right?

I don't know if this is necessary information, but I will be connecting headphones directly to the Zero.
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  #116 (permalink)  
Old 11-16-2008, 05:23 PM
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You get one dual HDAM for the DAC, using an all HDAM solution (1 for the DAC, 2 for the amp) would require heavy modding to grantee that "grunt".

The only reason to get more than one for the ZERO is to try to find the HDAM you like to most, most would recommend the OPA-Earth for the DAC.
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Last edited by DaMnEd; 11-16-2008 at 05:25 PM.
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  #117 (permalink)  
Old 11-16-2008, 05:33 PM
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Quote:
Originally Posted by DaMnEd View Post
You get one dual HDAM for the DAC, using an all HDAM solution (1 for the DAC, 2 for the amp) would require heavy modding to grantee that "grunt".

The only reason to get more than one for the ZERO is to try to find the HDAM you like to most, most would recommend the OPA-Earth for the DAC.
Grunt to power headphones? If so, my headphones aren't very demanding.
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  #118 (permalink)  
Old 11-16-2008, 05:52 PM
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To power the HDAM units.

What you suggest would be a gamble, personally I do not gamble, you may, and you may find it satisfactory, or not.
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  #119 (permalink)  
Old 11-17-2008, 06:08 PM
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Hello all, I just received my HDAM from audio-gd. I ordered an OPA-Moon Dual OPA with a 200mm extension wire.

Here's what I received:




Is this correct? It looks different from the HDAM on audio-gd's site, which has 3 sides instead of two:



Lastly, is the white wire attached to the HDAM the wire I'm supposed to ground?

Thank you all in advance for the advice.

Last edited by shampoosuicide; 11-17-2008 at 06:16 PM.
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  #120 (permalink)  
Old 11-17-2008, 06:14 PM
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Than is a single channel, you need the dual one, so you got the wrong version..

The white wire is the ground wire, not the extension lead!

The corrrect version would look like this:
http://www.audio-gd.com/Pro/diy/OPA/OPA-MOON1.jpg
http://www.audio-gd.com/Pro/diy/OPA/OPA-MOON2.jpg
http://www.audio-gd.com/Pro/diy/OPA/OPA-MOON3.jpg

And the extension lead would be this "thing" on the side of the HDAM: http://www.audio-gd.com/Pro/diy/OPA/lead.jpg
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Last edited by DaMnEd; 11-17-2008 at 06:19 PM.
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