Banned
Joined 2002
karma said:wow there's a sound i missed, it works again. it was the dac.
turned it way up thinking wasn't working.now half the building
knows it works
thanks peter
Is this one of the lcd's from your portable dvd-players ?
yes whats left of it. hers links where i get all my junk for projects
cheap. just type as is in the search.
http://search.ebay.ca/_W0QQfgtpZ1QQfrppZ25QQsassZ1000goods
http://search.ebay.ca/_W0QQsassZeldirectQQhtZ-1
http://search.ebay.ca/_W0QQsassZorwiteQQhtZ-1
http://search.ebay.ca/_W0QQfgtpZ1QQfrppZ25QQsassZbestforume
cheers
cheap. just type as is in the search.
http://search.ebay.ca/_W0QQfgtpZ1QQfrppZ25QQsassZ1000goods
http://search.ebay.ca/_W0QQsassZeldirectQQhtZ-1
http://search.ebay.ca/_W0QQsassZorwiteQQhtZ-1
http://search.ebay.ca/_W0QQfgtpZ1QQfrppZ25QQsassZbestforume
cheers
DAC Trouble Shooting
Finally got around to finishing the DAC...it's been a very busy winter. Unfortunately, I am having some problems. First, I have 7.35V after R1 but only only 4.25V after R3. Second, is no sound at all. Any suggestions? Amps have been working flawlessly, so all is not bad.
Finally got around to finishing the DAC...it's been a very busy winter. Unfortunately, I am having some problems. First, I have 7.35V after R1 but only only 4.25V after R3. Second, is no sound at all. Any suggestions? Amps have been working flawlessly, so all is not bad.
Banned
Joined 2002
karma said:
Id have to say I'll never go back to a flash site again. You should have stayed to html/php
Banned
Joined 2002
karma said:looks like audiooasis owns the webpage now. hmm time to remove that link. im sure thay make good money without my help
Peter doesn't need help selling his products they sell them selves &do a fine job at it too!
Re: DAC Trouble Shooting
If your CDP has output caps, it should not output DC. However, if you measure DC directly after caps, without shunt resistor, there may be a residual voltage present, which should dissapear after connecting to the next stage. Connect the CDP to the amp, with amp disconnected from the speakers, and measure DC offsets then: on amp's input and on amp's output.
If my calculations are correct, using 50k pot in parallel with 22k input shunt resistor and 2uF coupling cap will produce 5Hz cut off freq in worst case (it will also depend on pot setting).
What is the voltage on transformer secondaries?
Audiooasis was always handling AudioZone sales. Personally I'm not impressed by new website either, it does not look professional. Well, they used different services than I did
If your CDP has output caps, it should not output DC. However, if you measure DC directly after caps, without shunt resistor, there may be a residual voltage present, which should dissapear after connecting to the next stage. Connect the CDP to the amp, with amp disconnected from the speakers, and measure DC offsets then: on amp's input and on amp's output.
If my calculations are correct, using 50k pot in parallel with 22k input shunt resistor and 2uF coupling cap will produce 5Hz cut off freq in worst case (it will also depend on pot setting).
wdavis009 said:Finally got around to finishing the DAC...it's been a very busy winter. Unfortunately, I am having some problems. First, I have 7.35V after R1 but only only 4.25V after R3. Second, is no sound at all. Any suggestions? Amps have been working flawlessly, so all is not bad.
What is the voltage on transformer secondaries?
karma said:looks like audiooasis owns the webpage now. hmm time to remove that link. im sure thay make good money without my help
Audiooasis was always handling AudioZone sales. Personally I'm not impressed by new website either, it does not look professional. Well, they used different services than I did
Re: Re: DAC Trouble Shooting
Hello Peter,
Both secondaries show 9.05V. I am now showing 8.55 and 8.95 after R1 and R3, even though I haven't touched it since last night. Still no sound.
Wade
Peter Daniel said:What is the voltage on transformer secondaries?
Hello Peter,
Both secondaries show 9.05V. I am now showing 8.55 and 8.95 after R1 and R3, even though I haven't touched it since last night. Still no sound.
Wade
Peter Daniel said:Check the voltages on all 3 chips in 4 places. It should read: 3 x 5V and 8V (on DAC)
I have 3 x 5V and 7.45V on DAC.
Peter Daniel said:It still seems like the chip is drawing too much current, as normally, the voltage before regulator should be 11-12V and after regulator 8V (on a DAC).
I noticed that also but wasn't sure if I should be concerned or not.
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