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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
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Old 28th March 2019, 07:01 PM   #1
Greg Stewart is offline Greg Stewart  United States
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
Default IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...

I've had a bunch of the goodies from Ian's latest and greatest Group Buy on hand for a bit over a week now, with various combinations making music since this last Monday. NONE of it is broken in yet and I have a LOT of combinations and variations to try still... so no impressions to post YET.

BUT I'm starting this thread as a way to gather impressions and info about his GB RPi goodies... the FiFoPi, various DACs and I/V / output stages along with the ESS DAC controller, the LiFePO4 supply, the updated IsolatorPi, and a bunch of supporting accessories.

Anyone got any sonic impressions or tips they'd like to share.

Me, I'd like to get through a few more of the permutations I'm planning to try before starting to share how they work. PLUS I still have bits and pieces arriving... LL1544a's AND LKS discrete opamps both delivered today. A few more orders are yet outstanding. AND a few more to get in.

I'll update at some point what I've got and what I'm trying.

In the meantime, post away!

Greg in Mississippi

P.S. Anyone got any good alternative clocks worth trying? I have 22/24 & 45/49 Crysteks AND various NDK's... 22/24 & 45/49 SDAs, selected 90/98's from Acko, and a TON of standard SDs. Anyone got a good source for high-grade Connor-Winfield's or other possible alternatives?
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Old 28th March 2019, 08:30 PM   #2
wealas is offline wealas
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You just missed a GB here The Well Tempered Master Clock - Group buy but Laptech had more 22/24 and 45/49 crystals left (The Well Tempered Master Clock - Group buy) and Andrea probably has more boards so you can probably build yourself some clocks.
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Old 28th March 2019, 08:33 PM   #3
wealas is offline wealas
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Also, the ESS chips seem to support direct crystal connection rather than clocks so it would be interesting to see if a really good crystal provides any improvements over clocks.
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Old 28th March 2019, 09:50 PM   #4
Forane12 is offline Forane12  Bulgaria
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What about a group buy from Magicxtal in Russia? I think MOQ was 5 clocks, might get even more with all the people on the GB.
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Old 28th March 2019, 10:02 PM   #5
wealas is offline wealas
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The MXOC series looks really nice, I'll be up for some 22.xx/24.xx clocks.
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Old 29th March 2019, 09:19 AM   #6
jacklee is offline jacklee  Hong Kong
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I'm interested in the Magicxtal clocks as well. Those clocks look like the Pulsar Clocks btw.
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Old 29th March 2019, 01:36 PM   #7
TioFrancotirador is offline TioFrancotirador  Poland
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I did not tried ll1544, but I tried ll1684 amphorous core. It was great! Unitll I hooked up teramoto finemet Can't go back to amphorous now.
I also tried lifepo4. Same again here, it was great until I hooked up supercaps
Pity that pulsar clocks are no more available
I am also interested in magicxtal.
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Old 29th March 2019, 04:47 PM   #8
simon dart is online now simon dart  United Kingdom
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Quote:
Originally Posted by TioFrancotirador View Post
I did not tried ll1544, but I tried ll1684 amphorous core. It was great! Unitll I hooked up teramoto finemet Can't go back to amphorous now.
I also tried lifepo4. Same again here, it was great until I hooked up supercaps
Pity that pulsar clocks are no more available
I am also interested in magicxtal.
How much? Meanwhile back on planet earth....

I am super impressed with the way Ian makes his stuff, its so well thought out and user friendly but I have one suggestion/tweak.

I added a couple of plastic spacers to my baseplate for supporting the middle of the LiPo4 pcb. There is quite a lot of weight when loaded and I thought it would help the mechanical integrity as it is just supported round the edge. They just bear on the bottom of the board in a couple of places between the copper and take some load.

Obviously.... DON'T USE METAL if you do the same.
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Old 29th March 2019, 05:49 PM   #9
iancanada is offline iancanada  Canada
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
@simon dart

That's a very good point. I'll try to make some improvement for this on LifePO4 MkII.

Regards,
Ian
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Old 30th March 2019, 08:58 AM   #10
Supersurfer is offline Supersurfer  Netherlands
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I just assembled one battery supply and have a question: the supply only works when connected to the mains. Is it not possible to use it off the mains as a portable battery supply?
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