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Old 5th July 2010, 01:38 PM   #1661
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Malka, thanks for your listening impressions. Nice to know there are still improvements to do with this buffer.. We will wait for your results, and knowing if it worth to put a diode bridge or to balance CCS currents.

Is there any picture of your assembly?

Regards,
Regi
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Old 5th July 2010, 10:03 PM   #1662
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For the Mezmerize, does the selector ground go the pole?
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Old 5th July 2010, 10:05 PM   #1663
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The single pin of the selector (the one that you would use as 'out' if it was signal selection) goes to ground last one on the right, and each position pin goes to each relay's number on the selector marked strip on the pcb.
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Old 5th July 2010, 10:07 PM   #1664
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Quote:
Originally Posted by Salas View Post
The single pin of the selector (the one that you would use as 'out' if it was signal selection) goes to ground last one on the right, and each position pin goes to each relay's number on the selector marked strip on the pcb.
Ok, just wanted to be sure...
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Old 7th July 2010, 05:41 PM   #1665
Malka07 is offline Malka07  England
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Today i removed the 200ohm resistor, to go back to 50ma in one channel and 60ma in the other. There was absolutely no difference in sound to when it was balanced. I could'nt hear any difference, so Salas you was correct, such a little bit of imbalance in the ccs makes no difference, and so i must credit the improvment of sound i heard, to swaping the diode bridge supplying the Optical volume control with 4 mur120's...could a simple change like this bring about such an improvement in sound??? Well i definitely heard an improvement...so i think yes.

As requested here are a few pics of my Dcb1


And this is the Diode Bridge that i swaped out for 4 Mur120's


Next up, i will hotrod it...I have found this place for the heatsinks.

Heatsinks, Custom Heatsinks, Boardmounting Heatsinks, Anodised Heatsinks

Would someone be kind enough to suggest what heatsinks i should get? I intend to take the current to about 200ma per channel.

Thanks

Alon
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File Type: jpg 2.jpg (373.2 KB, 357 views)
File Type: jpg 3.jpg (498.1 KB, 354 views)
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File Type: jpg 5.jpg (538.2 KB, 188 views)
File Type: jpg 6.jpg (302.4 KB, 196 views)

Last edited by Malka07; 7th July 2010 at 05:44 PM.
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Old 7th July 2010, 06:47 PM   #1666
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There are so many variables you can play with Alon...but a component at a time is a good way to do it. One easy thing to try is with a 9V battery as supply for the LDR...assuming the LDR ps regulator can take 9V input, you can try 4 batteries in parallel. I have that for almost 2 months now and is not about to slow down yet at 8.66V (started at 9.63V). The LM317 can take up to 7V before I see a drop-off in the 5.5Vout supply that my LDRs require.

Thanks for your subjective opinions...I hear the same. Try Diana Krall...
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Old 7th July 2010, 06:50 PM   #1667
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You got a DCB1 too? Or just the optivol?
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Old 7th July 2010, 06:55 PM   #1668
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Now I can see the pictures more easily and it looks like it's with the DCB1...please try without too.
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Old 7th July 2010, 11:08 PM   #1669
Malka07 is offline Malka07  England
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Quote:
Originally Posted by Blues View Post
There are so many variables you can play with Alon...but a component at a time is a good way to do it. One easy thing to try is with a 9V battery as supply for the LDR...assuming the LDR ps regulator can take 9V input, you can try 4 batteries in parallel. I have that for almost 2 months now and is not about to slow down yet at 8.66V (started at 9.63V). The LM317 can take up to 7V before I see a drop-off in the 5.5Vout supply that my LDRs require.

Thanks for your subjective opinions...I hear the same. Try Diana Krall...
Hi Blues,

Thanks for the suggestion...i currently use 12v transformer and after the rectification i get 13.3v dc so dont see a problem with using a 9v battery to supply the optivol...i'll give it a try.

Alon
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Old 7th July 2010, 11:24 PM   #1670
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OT. Are those Seas 10 inchers like in Dynaco A25 lossy box? DIY speakers?
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