My Yeti-clone build

[Reeltarded]

You have wired the lamp in front of the switch and have it.. Uhh something else is going on. Pics please.

The hum is one of a pair of tubes is dead. It will heat and show light but one is dead, probably the other in the pair from the dead one you removed. The one that shows nothing at bias. HMMMMMMMMMM yes.

Don't put tubes in until you have followed a known startup plan and verified expected close voltages until you get awesome like me. (That was a joke, never do it)

[Mr Wright]

it is super messy.

[IMG1936]http://i.imgur.com/jyHJA0f.jpg[/img]

[IMG1936]http://i.imgur.com/UKgzYLb.jpg[/img]

[IMG2592]http://i.imgur.com/Tz4gIg2.jpg[/img]

[IMG2592]http://i.imgur.com/lo27iSh.jpg[/img]

also plate voltage came out around 508.

[Reeltarded]

Oh my word. Enough wire for three amps buddy. This is going to take me a while. Hopefully others help out.

I am looking at switch end. Let's all split up and meet back here.

[Reeltarded]

Looks like you have the amp wired ON across the bulb, first thing.. Hard to see but that is not right.

Be back.

[Mr Wright]

i forgot to add that those were before i fixed the switches and cut the light out completely.

also the bias testers weren't connected at that point.

[Reeltarded]

The scheme crashes my browser. Honestly I can see a lot that needs work. I am a little concerned with the added complexity of external bias points and split bias for a beginner, just to start with. It's layers above what it takes to make it work.

Does anyone have something they can use to unembiggen the scheme?

I don't have 40M pixels available.

[Mr Wright]

I worked mostly off of the layout on ceriatone's website and mirror some things incorrectly as far as physical location. That, laziness, and my drive to get the damn thing finished are what caused the excess sloppy wiring.

[Reeltarded]

This thing is going to howl like a wolf when it gets running.. so much gain and so many antenna runs over and across signal with voltage and vice versa.

Speaking of which.. you had this on a speaker load when you started it up? Please say yes, I had it plugged in with all controls at zero.

Right? The first thing to do is pull all tubes and start with the switching, the power, then the bias.. everything else is after that. Any unexpected voltage and we turn it off to snoop for that problem, then move on..

[Mr Wright]

Yes sir it had a speaker load and all controls at zero.

[Reeltarded]

Excellent.

Please do this. I know that it's only similar, but go over to Geroge's Metroamp sales sight and look into those chassis. The ones he builds. Starting at the switch end you should go through it one connection at a time and tidy all of that up. Problems will be self-evident, mostly.

By the time you get to the input, and it really won't take all day if you hammer it, it will probably crank up without tubes then we can talk about voltages.. but until it's cleaned up I don't think I can see what is going on, personally. I have crap eyes and stuborn glasses that refuse to wear me.

[MrHaroldA]

it is super messy.

[IMG1936]http://i.imgur.com/jyHJA0f.jpg[/img]

This is my "work in progress" ...

[img:800:600]https://lh3.googleusercontent.com/-MlOo ... 220258.jpg[/img]

... and I'm deeply worried my sloppy wiring will cause oscillation.

[Mr Wright]

Should I just start over in a bare chassis?

If I don't, what jumps out at you guys apart from my absurdly long runs of wire?

[Colossal]

Should I just start over in a bare chassis?

If I don't, what jumps out at you guys apart from my absurdly long runs of wire?

Well that's your call dude. Honestly, if it were my choice, yes, I would redo it; at the very least the wiring runs. FWIW, how you run the wiring in the amp (aka "lead dress") is a very important part of the equation. This cannot be understated, especially for a high gain amp like the Yeti.

It's kind of tough to help you troubleshoot but given the larger issue of wiring, even assuming your circuit and connections are actually fine, the wiring might give you no end of misery trying to keep the amp from oscillating or dealing with hum.

This build will certainly demonstrate that patience is paramount. If you've got a neat amp with a well thought out layout and you do run into a problem, it's much easier to troubleshoot.

[matt h]

(deleted)

[Smokebreak]

If I don't, what jumps out at you guys apart from my absurdly long runs of wire?

It looks like you have the board in backwards, or upsidown i.e. if you flipped it over it would be correct..it appears all the runs to the sockets are having to cross back over the board, same with the pot connections..
I think yeti uses full wave rectifier, I can't see the under board but it appears you have a bridge and that could be a problem depending on how the HT is connected.