He-69 build/support thread. PCB's/kits-available!

tomheavybeats

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Dec 11, 2020
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Whoops said:
This project was made by Igor 10 years ago. If you see there's not much activity after 2014.
Igor left this forum in 2013 and unfortunately the last news we had was that he passed away.

There's other Helios projects going on at the moment with "Mic Pre+ EQ" for the 500 series format, much more flexible than this one because this was just the EQ section. People moved on from this the the newer projects.

I wish you all the best for your build, and you should read the info that is already in this thread to help you out but don't expect much activity in this thread

Oh no, really sad news and yes sorry that was my first post here so I’m still getting up to speed.
Many thanks for the heads up, looking forward to this build and hope there’s enough info here to help and will check out the pre+EQ as a next build maybe. Cheers!
 

Whoops

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tomheavybeats said:
hope there’s enough info here to help and will check out the pre+EQ as a next build maybe. Cheers!

If you have all the docs, plus this thread you will be able to build them with no problems

As far as Helios projects with Mic Pre+EQ I think theres at least 2 different ones.

A lof ot info and threads on Helios here in the forum in the last 3 years, just do some deep searches
 

tomheavybeats

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Dec 11, 2020
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I have read through this entire thread and now I’m really worried about building these. I bought 2 sets of PCBs and front panels from frontpanels.de, in and out Lundahl trafos and grayhill switches. Have spent a lot but I’m wondering whether to cut my losses as there really aren’t many successful builds of this and I’m still confused as to the relay issue (some say 5v ones don’t work and need 12v). I would like to know if there’s anyone here with successful build please who can answer the relay question and link to one that works?  Completed builds on this thread seem to teem with issues. Thanks!
 

Rogy

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Jun 3, 2004
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Hi Tom,

I finished assembly of four HE69's just weeks ago.

Everything works as expected and the sound is really nice.

There were a couple of minor changes to get the Carnhill inductors correctly connected, but other than that the assembly was a breeze.

I'll go thru my order list and let you know which relays I used.

Best regards,

Rogy
 

tomheavybeats

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Dec 11, 2020
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Hey Rogy, thats great to hear and would really appreciate it, thank you. You've just inspired me to continue with this project too :D
If you have a mouser cart or similar and don't mind sharing that would be great, I have almost completed mine but would love to double check it against someone else's. I have all the build docs and in Igor's pics he uses a lot of polystyrene caps, did you go this route too as BOM just says to use film caps?

Thanks for the heads up on the inductor, when i get to that stage I will see if I have trouble too and may message you if ok.

Cheers
Tom
 
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