Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #20 on: September 02, 2018, 01:36:27 PM »
In my excitement about this project, I've been tinkering with Inkscape and have mocked up a meter insert which more or less reproduces the original Altec design. Fonts aren't perfect, though I'd say it's pretty close. I've sized it to match the Honeywell meters I've got set aside for the project - as far as I can tell, these are the same style & model used on the 436. 

Attached as an SVG - hopefully it will be useful to somebody (you'll need to trim and resize to fit what you're working with).

Thanks a lot! Cheers


Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #21 on: September 09, 2018, 04:23:21 PM »
First I made the gate sta level, then the federal nu 864.

waiting for good news about this project.

I love you ;)

petermontg

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #22 on: September 23, 2018, 03:40:59 PM »
Fun project,

Put me down for a set B.

Best
Peter

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #23 on: September 30, 2018, 02:36:20 PM »
Very excited for this. Any idea when pcbs will be available?

etheory


bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #25 on: November 12, 2018, 02:46:12 AM »
We have a prototype running and do various tests right now.  The circuit is working fine so far, a few things need to be checked again before we can release the pcb.  Stay tuned.
Bernd

vitopower

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #26 on: November 20, 2018, 04:14:07 PM »
Again with the vari-mu..this looks like a great project 8)

bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #27 on: December 15, 2018, 11:10:24 AM »
Updated first post. Made a short video of the working prototype .
Cheers
Bernd

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #28 on: December 15, 2018, 11:17:25 AM »
In for a set once they are ready. Been wanting to build a vari mu for a while  :)

TwentyTrees

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #29 on: December 15, 2018, 11:27:16 AM »
Ditto!   ;D


bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #30 on: December 16, 2018, 06:55:07 AM »
PCBs available right now!!!
See first post or go directly to Zayance white market thread
https://groupdiy.com/index.php?topic=53011.0

petermontg

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #31 on: December 19, 2018, 06:37:17 AM »
That is brilliant news. Thanks for the work B

Best
Peter

groselicain

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #32 on: December 24, 2018, 11:40:27 PM »
Forgive me if this is a dumb question—is this a stereo unit? I noticed in the BOM that there's only a single input and output transformer listed but it looks like there are two input transformers on the PCB.

mysticmerlin

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #33 on: December 24, 2018, 11:43:35 PM »
Yes Its stereo. I ordered the sowters. Watch the video maybe

brndvnrdn

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #34 on: January 15, 2019, 04:29:03 AM »
Looks really nice this project  :D

bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #35 on: January 15, 2019, 04:33:07 AM »
In fact it is! I’ll upload additional files (schematic, BOM, frontpanel, etc.) soon. I’m a bit busy right now but won’t forget you.
Stay tuned!
Bernd

etheory

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #36 on: January 15, 2019, 08:23:31 PM »
My PCBs have arrived safely and look beautiful. Thank you so much! Looking forward to getting stuck into this build.

bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #37 on: January 21, 2019, 12:45:32 PM »
full schematic and universal frontpanel design added. (2nd and 3rd post)
Cheers
Bernd

TwentyTrees

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #38 on: January 21, 2019, 01:46:48 PM »
Thanks Bernd!

full schematic and universal frontpanel design added. (2nd and 3rd post)
Cheers
Bernd

etheory

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #39 on: January 21, 2019, 09:23:16 PM »
Hi all,

This is awesome. Thanks for the schematics, but could you additionally please make some comments about:

1.) The choice of input transformers. There are 1:1 and 1:4 suggestions, under which circumstances would you suggest using those options? (i.e. for use as a line-input tracking/mastering compressor vs a mic-amp or whatever).

2.) The choice of output transformers (even if you just provide, as a suggestion, what you built it with so we have a starting position).

3.) The choice of tubes. On the schematic, the tubes aren't labelled, even though they are for the heater schematic (it'd be great for completeness to add that to the .pdf schematic in the first few posts). I'm curious about the choices, when on one of the "original" threads, the 6ES8 was suggested for the input/gain tube, and the 6CG7 for the output. You guys have clearly suggested other tubes, but is this for reasons of availability, or do we need to modify the other parts for different tube choices?

Thanks!


 

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