193L in a Modded DAC-AH.. - Page 4 - diyAudio
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Old 8th March 2007, 02:04 PM   #31
JandG is offline JandG  United States
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Location: Washington State
truthfully, I am not sure on the .001uf, It could be .01 ..I have not popped the top in almost a year, I will check it out this weekend & let you know about c1-c2..I am not sure about using the H...probablly would be o.k...what the L does in theory is complex as expalined to me by a EE audio nut,, but I am not qualified to say if the H would be safe to use..I will get the input cap value's for you this weekend..This Dac is extremely good in this form...my tube amp is .33v sensitive for full output @ 100K..just so you know..1.5v & up sensitive..amps will struggle with the low Voltage of the by-passed output stage..so then apre or best bet would be one of the tube output stages posted around the net..hopefully you can run it as I do ,,simple & I feel better,,clean, clean////
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Old 8th March 2007, 04:51 PM   #32
vvs_75 is offline vvs_75  United States
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Thank you for the prompt respond!

Also your 193L choke is connected directly to the IEC so it always powered. May be it's better for me if I put it after the switch in parallel with 0.47 caps thus the choke can be switched off with the rest of the circuit.

Thanks!
Vad
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Old 14th May 2007, 04:55 AM   #33
pulidzz is offline pulidzz  United States
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Default WOW $2 mod!!!

I just finished doing the passive mod on the DAC ah. I used two 2.2F 50V 20% Nonpolarized Electrolytic Capacitor 9,000Hz from radioshack (worth 99 cents each).

This mod really works. My stock dac ah was using a pair of EL2044 op amp. I am not familiar with the said op amp and I cant Google anything about it. Anyway I don't like the stock sound. The highs sounds distant and rolled off, the mids kinda too in front of the sound stage and sounds muffled and congested at times, the bass is punchy but sounds like its rolling off too early. Something just doesnt sound right when listening to the sound of an electric guitar on rock recordings. With the Radioshack caps, I can hear improvements already (I cant wait to some 1% tolerance Dayton caps in this mod). Thanks JandG for the help!

BTW, can anyone tell me what's the positive and negative wires of the Auricap and Dayton caps? I just dont want to solder them incorrectly. Again, thanks!
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Old 14th May 2007, 12:49 PM   #34
JandG is offline JandG  United States
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With Auricap it is signal into Black lead & out Red lead, but doesn't really matter as far as damage to anything. try eaither way it does not matter. Also w/ the Dayton, you can put it in there anyway you want to, & will work fine.
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Old 24th July 2007, 11:41 PM   #35
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Default update on promised info?

JanfG.

Have you ever gotten around to popping the cover of your Dac AH to see what the values of the Mundorfs are in the C1 and C2 position? Mundorf doesn't make a .001 capacitor.
Also, where did this mod originate? What is the purpose and function of changing out these caps? Why specifically Mundorf Silvers? Can you tell me if any other good capacitor (Hovland, MIT, Vcap etc) would be acceptable in place?

Thnaks

JD
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Old 5th April 2009, 04:35 PM   #36
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hi, im new to DIYAUDIO and a beginner! Im very very interested in the LITE DAC MOD posted and i will definitely gonna try on my dac ASAP! Just to confirm, does this mod sttill need OPAMP to work? I have seen mods that no longer need op amps anymore! And whats the difference? Thanks alot for clearing my doubts!
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Old 6th April 2009, 10:06 AM   #37
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and how you guys determine the value of coupling caps? thanks!
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Old 10th April 2009, 09:09 PM   #38
JandG is offline JandG  United States
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Jeffdavison,
The M-cap silver supremes are a pair of 0.01uf caps. I just poped the top & looked, sorry for the wait.
Joe
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Old 10th April 2009, 09:25 PM   #39
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hi janG, i just followed your recomendation and hooked up Auricaps and a choke , and the sound is much better than op amp! thanks alot for sharring. I havent replaced C1 and C2 yet. and i plan to replace caps near Toslink too, since im using optical. You think it will make much difference? Thanks.
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Old 10th April 2009, 11:13 PM   #40
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btw, have u tried modding using tube output?
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