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Post by pahstah on May 19, 2019 4:43:40 GMT -6
Hi everybody! i've recently built a Helios inspired pre/eq for 500 series, it's a working prototype, once everything is finalized i will do a small batch of pcbs. If someone is interested please let me know. some pictures:    input amp  output amp thread at Groupdiy: groupdiy.com/index.php?topic=72521.msg918598#msg918598 |
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Post by kevinnyc on May 29, 2019 10:01:25 GMT -6
I’ll take a couple!
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Post by pahstah on May 30, 2019 14:24:32 GMT -6
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Post by kevinnyc on Sept 3, 2019 8:44:29 GMT -6
How are those PCBs coming along? For some reason I’m in the midst of a Helios obsession 😜
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elcct
Full Member
Posts: 36
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Post by elcct on Sept 3, 2019 17:09:29 GMT -6
I'd love a pair.
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Post by pahstah on Sept 10, 2019 7:05:49 GMT -6
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Post by kevinnyc on Sept 18, 2019 9:35:48 GMT -6
Are those pcbs for sale yet?
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Post by pahstah on Sept 19, 2019 10:23:45 GMT -6
i'm currently doing revision 3, some minor tweaks.
Paolo
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Post by kevinnyc on Oct 23, 2019 10:03:51 GMT -6
All I want for Christmas are some Helios clone pcbs 😂
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Post by pahstah on Oct 29, 2019 1:50:01 GMT -6
the preamp is now in his third revision. is working perfectly. the only tweak that i want to try is to lower the Q of the mid band curves to match those of my original helios 500. there is not a big difference between the two, and maybe an higher Q is preferable, still I want to try.
you can see the plots of the two equalisers compared on group diy under the preamplifier section
Paolo
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Post by matt@IAA on Oct 29, 2019 11:47:02 GMT -6
the preamp is now in his third revision. is working perfectly. the only tweak that i want to try is to lower the Q of the mid band curves to match those of my original helios 500. there is not a big difference between the two, and maybe an higher Q is preferable, still I want to try. you can see the plots of the two equalisers compared on group diy under the preamplifier section Paolo Paolo what software are you using to generate those graphs? |
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Post by pahstah on Oct 29, 2019 13:01:31 GMT -6
REW (short for Room Eq Wizard) through RME Fireface 400 at 88kHz doing a 3 seconds sweep from 0Hz to 50kHz if i remember correctly.
Paolo
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Post by kevinnyc on Jan 17, 2020 7:17:18 GMT -6
I’m dying to hear how this project is coming along 😀
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Post by pahstah on Jan 19, 2020 4:21:06 GMT -6
revison 4 in the making, fingers crossed
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