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Quanghao Audio Design Quanghao Audio Design is a producer of DIY Audiophile Kits and PCB boards, selected from many listening tests!

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Old 15th February 2010, 01:05 PM   #701
Tea-Bag is offline Tea-Bag  United States
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PartsConnexion does .01 for $1 and .1uf for $2. I dont think they have a minimum order of them.
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Old 15th February 2010, 02:48 PM   #702
agithegreat is offline agithegreat  United Kingdom
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Originally Posted by mikel_ann View Post
What do you mean ?

1 x 230V alternative 2 x 115V on primary side ?
Thats exactly what i mean, yes.
Will it be 2 x 115v?
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Old 15th February 2010, 03:53 PM   #703
mikel_ann is offline mikel_ann  Germany
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Originally Posted by agithegreat View Post
Thats exactly what i mean, yes.
Will it be 2 x 115v?
No, 1 x 230V only, but 1 x 115V is as an alternative possible.

Michael
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Old 15th February 2010, 04:17 PM   #704
Tea-Bag is offline Tea-Bag  United States
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Quote:
Originally Posted by mikel_ann View Post
No, 1 x 230V only, but 1 x 115V is as an alternative possible.

Michael
Might be interested in a all in one version for 115v.
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Old 15th February 2010, 04:35 PM   #705
Ekkeri is offline Ekkeri  Finland
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Originally Posted by Ekkeri View Post
What type of specs the L1 & L1 120ÁH should have? Current, tolerance, resistance, core, shielding..? Any recommentations what manufacturer / part number to use? Those are in pretty critical place in the signal path..
Output current from AD1865 is 8mA, so that won't be a limiting factor..

How about this:
Digi-Key - M9947-ND (Manufacturer - RL824-121K-RC)

I'm not completely happy with those. Audionote seems to be using their own silver wire chokes..
Ferrite core, if I remember right..

What kind of choke would be the best? Any analog filter designers here?
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Old 15th February 2010, 05:47 PM   #706
tassosk is offline tassosk  Greece
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Originally Posted by Tea-Bag View Post
PartsConnexion does .01 for $1 and .1uf for $2. I dont think they have a minimum order of them.
I put an order a week ago and 0.1uf was out of stock.
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Old 15th February 2010, 06:59 PM   #707
agithegreat is offline agithegreat  United Kingdom
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Originally Posted by mikel_ann View Post
No, 1 x 230V only, but 1 x 115V is as an alternative possible.

Michael
Aha, ok. No thanks then, i wanted an 'all in one', which i could use currently in USA, but still use it when back home in the UK.
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Old 15th February 2010, 09:35 PM   #708
tassosk is offline tassosk  Greece
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Originally Posted by mikel_ann View Post
I talked to a guy in Germany cause the transformer. He is building perfect transformers for valve-amps.

The Anode-current is 30-36 mA per valve, Ýs that right ?

We can get a very good transformer for "payable money" which delivers
3 x 12v / 1 x 9V and 1 x 250V.

Hope to can tell you more next week.

regards Michael
I'm interested too. Your previous GB on AD1865 has been executed perfectly.

Last edited by tassosk; 15th February 2010 at 09:42 PM.
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Old 16th February 2010, 12:43 AM   #709
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by sugden View Post
I check my local Farnell & RS website, they selling Vishay Roederstain MKP1837 0.1uF & 0.01uF very expensive. I will find other source. Can i use Sprague Black Beauty 0.01uF/600V as input cap. at C28 & C29 on DAC-end board? Thanks
Yes! it is a good way! I had to place on the PCB for better use capacitors in the input (C28, C29) or can use the cap better if you have it. the sound is better when you choice the better cap for input! Not need 0.01uf/600V, 100V is Ok

The output capacitor (c26, c26= 0.01uf ) // R 200 Ohm you use only mica is ok
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Old 16th February 2010, 04:43 AM   #710
sugden is offline sugden  Singapore
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Hi Quanghao, can you advice us what type of inductor or choke should we use as L1 and L2 on the Dac-end board for good sounding? Thanks.
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