bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #40 on: January 22, 2019, 02:30:00 AM »
Unfortunately, we can’t give any recommendations concerning specific brands. It’s up to your personal taste and of cause to your budget, which tube brand you want to use.  Same applies to the choice of transformers. Any decent 1:1 input transformer with center tap will work fine. The output transformer from Sowter is certainly  first choice in terms of quality and availability.  I used  transformers from AVD Audio. He is a member of this forum and makes decent transformers. Search in the white market.

I suggest you to build the NU Varimu 436 with easily available parts. Later you can tweak the unit and test various tube and also transformer brands according to your personal taste.
Cheers
Bernd


Unit-8

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #41 on: March 13, 2019, 02:11:50 PM »
Hi Bernd,

I found an error on Motherboard  + Control board  components list where R10A-B and R11A-B the value is 10k while on schematic is 18k.
Also R10, R11, R13 has the same Mouser ref code.
Could you please double check on MB + CB list, PSU list and schematics?

Thank you!

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #42 on: March 13, 2019, 07:29:33 PM »
whats the estimate price for all parts, PSU, PCB and case in total?

weiss

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #43 on: March 20, 2019, 06:37:07 PM »
Same question here..
Also are there pcb's in stock?

zayance

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #44 on: April 05, 2019, 05:13:53 AM »
Same question here..
Also are there pcb's in stock?

PCB's are in stock no prob, in terms of pricing, Bernd can maybe give an idea? The answer always depends on what you'll choose and use etc... as you all know.


Best,


T.

zayance

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #45 on: April 05, 2019, 08:17:24 AM »
Hi Bernd,

I found an error on Motherboard  + Control board  components list where R10A-B and R11A-B the value is 10k while on schematic is 18k.
Also R10, R11, R13 has the same Mouser ref code.
Could you please double check on MB + CB list, PSU list and schematics?

Thank you!

Hi There,


Sorry for the long reply time, me and Bernd are pretty busy with life, so having a hard time doing our part on these lately.
Anyway,

R10A & B is 18K
R10-11-13 is just me doing copy paste on refs when doing the BOM, thanks for pointing that out, BOM updated.

Don't hesitate to come back here if you find something wrong on BOM, always nice to have a second view by members.


Thanks a lot.


Best,


T.

Kid Squid

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #46 on: April 05, 2019, 08:21:35 AM »
Gorgeous !

Deffo thinking of doing a case for this Beauty.

It is not the same as 4+12, nor is it the same as 4+8, but 4+12 IS the same as 4+8+12....

http://www.facebook.com/LazyLizardLabs

Unit-8

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #47 on: April 09, 2019, 11:18:15 AM »
Hi guys,

On control board BOM I found R120 A & B and R9 A & B have their values reversed compared to silkscreen on the boards and also on the schematics.
There is also the HTRLED value on the BOM is 24.9k and on board and diagram is 47k.
No others errors found so far.
I have finished to populate the PCBs and I would like to know about measuring points and voltages readings.

Cheers

bernbrue

Re: [BUILD] NU VARIMU 436 build & help thread
« Reply #48 on: April 09, 2019, 11:36:00 AM »
Man, you are fast! Thanks for spotting these errors. I’ll do detailed measurements when I’m back home from holiday in about two weeks.
Cheers
Bernd

zayance

Re: [BUILD] NU VARIMU 436 build & help thread New
« Reply #49 on: April 21, 2019, 11:22:31 AM »
Hi guys,

On control board BOM I found R120 A & B and R9 A & B have their values reversed compared to silkscreen on the boards and also on the schematics.
There is also the HTRLED value on the BOM is 24.9k and on board and diagram is 47k.
No others errors found so far.
I have finished to populate the PCBs and I would like to know about measuring points and voltages readings.

Cheers


Thanks for that.
Use 24.9K value for LED Resistor, since we need a 250VDC supply, and a 10mA at LED, then you spotted
a minor errata on value for the Schematic PSU & PCB.
47K won't do here....

Best,


T.
« Last Edit: April 21, 2019, 02:13:36 PM by zayance »


 

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