AMB Laboratories DIY Audio

[amb]

There was one other question in the last post and I hope it doesn't come to this but "I only hope that the SSRs do not cause any of them [transformers] to hum, if they do could I use a [pair of] G8P-1A2T-F-DC12 instead and a higher rated 12v transformer for this purpose?"

Yes, that will work.

[wobblebonk]

So the transformers should arrive early next week... hopefully the chassis will be soon to follow.

I suppose this is kind of just a picture of the pcbs but you can kind of see my EL30 collection behind them ;p


Part of the unregulated power supplies...


My LED wires. I decided to just have led1, led2 and the led from the s22 on the front panel of the chassis. This photo caused me to notice a clump of crap stuck to one of the through holes and it kind of bothers me, but I wonder if anyone else can even see it.

[wobblebonk]

So I guess my pictures were too large, I see maybe half of them unless I open them in a new tab.

[amb]

D7 - D10 don't need to be quite so "high" -- too easy to short circuit this way. 5mm is enough for heat dissipation purposes.

[wobblebonk]

Okay, I have taken your suggestion and shortened them to about 5mm off the board.

[amb]

So I guess my pictures were too large, I see maybe half of them unless I open them in a new tab.

Yeah, resize them to no more than 1024 pixels wide to fit most screens, and the pics will look less grainy too.

[wobblebonk]

Changed the links to smaller pics which were conveniently 1024 pixels wide.

[wobblebonk]

Small update... my transformers arrived and everything seems to be working as planned so far. I still need to hook up the SSR to check for a mechanical hum but the S22s put out approximately +-36.05v and +-35.69v. Pretty sure this is fine for my purposes. In other news I was running out of standoffs and couldn't get the sizes / threading I wanted cheaply so I wound up ordering 500 small al standoffs (to stack to my desired heights) through amazon. They charged me once but double shipped my order. What the hell am I going to do with 1000 aluminum standoffs? That said I wish more of my problems were of this nature.

[wobblebonk]

They live...


... please excuse the mess of wiring and such, as nothing is even attached to the chassis yet besides the things on the heat sinks...

The chassis came with some mini bulgin switches that have 24v leds, unfortunately the contacts just switch whether they are connected or not when you press the button so i might need to drill the opening a little bigger and use my other power buttons. Is there any way I could use this type of button for the e24 even if the led is not going to work (there's already 3 on the front...)?

I got the offset somewhere around 3mv or less (3-2ish on one board and <1 on the other) on all 4 outputs. I guess now I just work on finishing the casing. I am thinking I might forego the internal psu platform to save money because all the walls are 4mm or thicker and my transformers are a bit smaller than in the single chassis builds. Also the case came with some 16mm high aluminum feet so the 24mm missing internal height was 4mm of top and bottom and 16mm of feet.

[amb]

Not sure what you mean by "contacts just switch whether they are connected or not". Which contacts?