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Phonoclone 3
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Old 27th February 2013, 04:51 PM   #721
dimkasta is offline dimkasta  Greece
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Finally I think I am finished with moding my phono...
Last changes are Russian coupling caps (K75-10 at 2.2uF bypassed with FT3 teflon at 0.1uF) and red leds for the indicators.
The red leds where a bit more silent than the super bright white ones, giving a more clear sound.
On the other hand the russian coupling caps were a complete revelation. The difference when replacing the mundorf supreme ones is almost throughout the frequency spectrum. There is way more clarity, detail and energy.
Only the lower bass seems a bit shy at the moment, but they are still pretty fresh from their box. I can t imagine how will they sound when they are properly broken in after the recommended 200 hours... (ouch...) But they already sound terrific...
For the moment the only change I want to do is build a proper chassis for it and replace that ugly aluminum box...

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Old 7th March 2013, 06:03 AM   #722
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Those caps are enormous. They properly belong clamped to the chassis rather than strung off the boards like that.

Bonus points for using the V+, V- I/O pads for LED indicators. I hadn't thought of that. Try to keep the LED currents down below 10 mA though to avoid loading the X-reg unnecessarily.
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Old 7th March 2013, 07:43 AM   #723
dimkasta is offline dimkasta  Greece
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Yeah I know about the caps... not to mention that the case is with PCB up when playing which means the caps are hanging from the thin wire like tarzan....

This is temporary anyway. I just need to find some time to get some wood to build a proper chassis (going to shield it with M3 tape)
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Old 7th March 2013, 09:56 AM   #724
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Every component I've ever built has had the boards "upside down"! It's the natural arrangement when using those cast aluminum project boxes.
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Old 3rd October 2014, 12:46 AM   #725
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Default Phonoclone noise measurements

http://www.diyaudio.com/forums/blogs...surements.html
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Old 25th October 2014, 03:02 PM   #726
buzzforb is offline buzzforb  United States
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Sorry to pop in with possible redundant question, but has anyone tried the LME opamps in this circuit.
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Old 27th October 2014, 01:06 PM   #727
dimkasta is offline dimkasta  Greece
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Have a look at the relevant helpdesk thread. Lots of experimentation there.

The Phonoclone and VSPS PCB Help Desk
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Old 17th January 2015, 05:18 PM   #728
Jamh is offline Jamh  United States
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I finished my case for two boards Richard sent me. It's not the final version since I'm waiting for better caps and an R-core transformer, nevertheless, they already sound much better than my Grado. Here are some pics.

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Old 17th January 2015, 05:18 PM   #729
Jamh is offline Jamh  United States
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Old 17th January 2015, 05:19 PM   #730
Jamh is offline Jamh  United States
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