Aleph J illustrated build guide

[ItsAllInMyHead]

Sounds like you're on a great path. If you have trouble finding the sizes for anything, feel free to ask. The spec sheets for most parts have a technical drawing also.

Andy can confirm, but he may be referring to something like this re: pin connectors.

https://www.amazon.com/gp/product/B07XBLGPCY/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&th=1

Enjoy your build.

 

[Russellc]

I highly regard direct soldering and or shrinked needle pins instead of fastons. Not as flexible, but ensures tight sleep every night

Same here. Most of those plastic covered ones I grab with needle nose, hold it in flame and scrape the plastic off. Solder, cover with shrink wrap.

Russellc

 

[Toadroller]

I'm curious what a needle-pin is as a connection. Could someone share a picture?

I used a lot of fast-on connections in my builds. Bought lots of crimp-on connectors in various sizes (20awg, 16awg, etc.) from Amazon

 

[andynor]

I'm curious what a needle-pin is as a connection. Could someone share a picture?

I used a lot of fast-on connections in my builds. Bought lots of crimp-on connectors in various sizes (20awg, 16awg, etc.) from Amazon

 

[Toadroller]

Thank you.

looks like some are soldered fast-ons and some are wires soldered into the board.

Do some have a physical pin in them?

 

[Zen Mod]

 

[Extreme_Boky]

Thank you.

looks like some are soldered fast-ons and some are wires soldered into the board.

Do some have a physical pin in them?

I used a Mogami W3101 4mm² (#12AWG) cable and heavy-duty pure copper Terminals PIN WIRE 16-14AWG (Mouser):
https://au.mouser.com/ProductDetail/TE-Connectivity/165045?qs=HjC056NR38F9ygYZj8ieGw==&countrycode=AU&currencycode=AUD

Check the picture I attached. That 4mm² (#12AWG) wire can almost fit... the remainder can be carefully spread on top of the pins and then soldered. You'll need a 60 - 80W soldering iron.

 

[andynor]

Thank you.

looks like some are soldered fast-ons and some are wires soldered into the board.

Do some have a physical pin in them?

Yes, it looks that way but is not. I used pins looking like the ones MZM posted, but without isulation. First presoldered the wires, then machanically shrinked the needle pins, then solder it all together with a bunch of flux and a huge solder tip. Then soldered that to the board. So four processes. Not going anywhere

 

[andynor]

Presoldered=tinned
Shrinked=crimped

Up in the middle of the night, travel, words lost

I used copper pins from Mouser, tinned. Can’t remember/find the part nr now.

btw: purely MZM’s recipe.

 

[Toadroller]

I ask, you explain, I learn.

Thanks, all!

 

[ElliJ]

I had all the bits to make an AJ, was waiting for the DIYaudio Store to get some boards in and got bored. So I looked at some layouts, learnt KiCAD and got a few PCB’s made in china. Just finished stuffing my first board and hopefully get the second done tomorrow. I still need to sort out my heatsinks and power supply. Should have magic smoke or an amp in a couple of weeks. Never made an amp from scratch so fingers crossed

 

[Mark Johnson]

Congratulations! If those are your first PCB layouts, you've got quite a talent for this kind of work!!

 

[ElliJ]

Thanks Mark. They are unproven and like I said, I looked at few other layouts ( I copied some bits ).

 

[e_fortier]

Congrats, very nice work.

I like the EKG heart monitor, cool ❤️

 

[Vunce]

Nice job ElliJ, your boards look great!
Hopefully no magic smoke🤞

 

[Zen Mod]

what a Joy, what a Joy!

 

[rikiheck]

Post the boards if they work?

 

[Toadroller]

Good for you! I love this. Nice touch:

 

[adason]

Reminds me La Linea cartoon.
https://www.google.com/search?q=la+...O4CmYQ_AUoAnoECAIQAg&biw=412&bih=718&dpr=2.63

 

[JeyDee]

I had all the bits to make an AJ, was waiting for the DIYaudio Store to get some boards in and got bored. So I looked at some layouts, learnt KiCAD and got a few PCB’s made in china. Just finished stuffing my first board and hopefully get the second done tomorrow. I still need to sort out my heatsinks and power supply. Should have magic smoke or an amp in a couple of weeks. Never made an amp from scratch so fingers crossed View attachment 1082788

Sweet!!🙂

I really like the placement of the placement of the +/- 24V solder points. The heart rate monitor is a added bonus cool touch 😎👍