V4lve lover's free Gerbers thread

[v4lve lover]

Plain irf840 will do

 

[fredeb]

Will NTE2387 also work ?

 

[krca45]

Thanks

Just looked if Mouser has some BUZ80 and they directed me to this one :

STP4NK80Z

https://www.mouser.co.uk/ProductDetail/STMicroelectronics/STP4NK80Z?qs=mLGruWOCTdGUnJ7D0K4D2Q==

 

[krca45]

V4lve Lover thank You very much - IRF840 is standard item, have them.

 

[HAL2000]

Plain irf840 will do

Works as you show on sketch for resistors and IRF840. Thanks this tread is best, Sharing knowledge is what in what I believe. 10x

 

[zoom777]

View attachment 1255102

Hello @v4lve lover , can you please provide some guidance on the selection of R3 values?
I assume it is selected base on load current, but if you can provide an approximate gauge and range, i would really appreciate your help.

 

[zoom777]

Ive nearly finished my last batch of 6.3VAC to 6.3VDC supplies. Therefore I am posting the gerbers for these very convenient PSU modules.

Sorry for the Use of MELF resistors, but there was no other way of building these as compact as they are.

Be aware that the main filter capacitors are 22.5mm snap-in types, not 25mm. And these are quite hard to source. Mouser-nr. 871-B41231A3159M000
Fet: 512-RFP12N10L
Controller: 998-MIC5156YN
Cooler is a SK129-38 available from TME or Reichelt.

I will still build these upon request and a minimum of 4PC.

@v4lve lover ,
Thanks for the design and gerbers. Although you have mentioned that they can do 2.5A, I have only tested them on 1.5A load due to capacity of my transformer. And i think 1.5A verified is more than sufficient for most applications and the heatsink is within comfortable temperature. They work very stable and nice. Thanks again.

 

[v4lve lover]

you're welcome.

 

[Bas Horneman]

Indeed. Thanks v4lve lover! I have tested them to 2.4A (2*6W6 heaters)

 

[v4lve lover]

I think they will be good up to 3A the diodes being the limiting factor.

 

[WntrMute2]

@v4lve lover ,
Thanks for the design and gerbers. Although you have mentioned that they can do 2.5A, I have only tested them on 1.5A load due to capacity of my transformer. And i think 1.5A verified is more than sufficient for most applications and the heatsink is within comfortable temperature. They work very stable and nice. Thanks again. View attachment 1306735

Question regarding your trimmers. Do you have series numbers/manufactures for those trimmers with extended knobs? They would be very helpful for my application!

 

[grovergardner]

Indeed. Thanks v4lve lover! I have tested them to 2.4A (2*6W6 heaters)

I've been running 4 6SN7s in my Aikido preamp for over 6 months now with no problem.

 

[zoom777]

Question regarding your trimmers. Do you have series numbers/manufactures for those trimmers with extended knobs? They would be very helpful for my application!

Hi I bought it from Alixpress. Bought quite a few times for my various projects, they are of good quality and reliability, as per what a handful of buyers have mentioned :
https://vi.aliexpress.com/item/1005...dafDQN7D&mp=1&gatewayAdapt=glo2vnm#nav-review

 

[nerdorama]

Regarding the 6.3VAC to 6.3VDC regulator boards as shown in post 167 above:

What is the intention for the 6V aux output? Looks like I could build the boards without these extra parts if I don't need it. Just wondering.
Thanks,
John

 

[grovergardner]

I'm not sure what you mean. There's 6VAC input on one end, and 6VDC output on the other, that's all.

 

[nerdorama]

If I'm looking at the correct schematic, there is also a 6V aux, as it is labelled. It includes a small DIP size bridge rectifier and the filter components. At the top of schematic is the aux circuit.
https://www.diyaudio.com/community/...ree-gerbers-thread.359636/page-7#post-7116710

edit: is it just for the LED?

 

[zoom777]

It is necessary. Explained in the datasheet. It goes to pin 4 of the controller chip.

 

[nerdorama]

Thanks, I didn't notice the connection for it on the controller chip.

 

[v4lve lover]

I have four of these boards remaining. all parts fitted except for the controller and the main filter capacitors, heatsink and fet are also in stock.