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noDAC DHT output stage
noDAC DHT output stage
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Old 3rd March 2019, 06:38 PM   #21
merlin el mago is offline merlin el mago  Europe
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What choke are you using now, amorphous?
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Old 3rd March 2019, 07:16 PM   #22
Koifarm is offline Koifarm  Netherlands
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Quote:
Originally Posted by merlin el mago View Post
Could you elaborate why you chosen two corner frequencies and what's the final Fc?
Fc about 37khz at 1260ohm output impedance.
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Old 3rd March 2019, 07:18 PM   #23
merlin el mago is offline merlin el mago  Europe
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Isn't too low? Did you heard noise with the Fc higher?
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Old 3rd March 2019, 07:24 PM   #24
Koifarm is offline Koifarm  Netherlands
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I have with transformer no filter no noise but a little bit distorsion(0.8%).
With filter and transformer i had 0,1% distorsion. With isolator, filter and tube cathode follower i have 0.04% distorsion. No noise. Isolator has it ones power supply.
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Old 3rd March 2019, 07:25 PM   #25
merlin el mago is offline merlin el mago  Europe
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What transformer do you use?
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Old 3rd March 2019, 07:40 PM   #26
Koifarm is offline Koifarm  Netherlands
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Lundahl LL1521B
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Old 3rd March 2019, 07:44 PM   #27
merlin el mago is offline merlin el mago  Europe
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Have gain?
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Old 3rd March 2019, 07:51 PM   #28
Raj1 is offline Raj1  United Kingdom
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ultranalog: CD enhancer II
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Old 3rd March 2019, 07:55 PM   #29
Koifarm is offline Koifarm  Netherlands
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Quote:
Originally Posted by merlin el mago View Post
Have gain?
2.3 times step up.
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Old 3rd March 2019, 08:01 PM   #30
merlin el mago is offline merlin el mago  Europe
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Thant's very good numbers, could I ask how much cost?
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