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jac,
First off, Im glad that you're back home, Buddy. Second , nice job on the wiring. I've looked at the wiring around the tranny and I can't see anything obviously askew.
However , from the pics, I noticed that the black primary that is going to common (I think) looks as if the insulation has bubbled a bit.
Here's what I'd try. (But, only if you feel like it. Your healing is more important right now, and the amp can wait. ) Remove the tubes. Unplug the power. Then set your meter to resistance (continuity) . With one lead on ground , check for continuity on pins 4 & 5 on the rectifier tube socket. You should get no reading.
Next check for continuity on pins 1 & 7. Since they are center tapped to ground they should give the same reading in ohms. Also check the two green heater wires in reference to ground. They are also center tapped and should give equal readings. We are looking for an obvious short in the windings of the tranny. Also since the two green wires feed heater current to so many tubes, you need to triple check the heater wiring on each of your pre and power tube sockets. A short there can cause problems in your tranny. Really look closely for stray strands of wire or splashes of solder. Your eyes are probably like mine and don't work as well as they once did. I put on two pairs of readers when I need to see closely.
Get back to me here when you have a chance to check it. We'll work it out together slowly, okay.

LeeMo

Yes, sounds like a short. If you're disconnecting wires, it's a good time to also test the PT with nothing connected to it except 120V.

Then add in the amp connections.

But be very careful with the high voltages.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Hey leemo,
Been a tough road, but thatt's life.
Pins 4&5 have continuity. Pins 1 & 7 DO NOT. What gives, my wiring is right..
Now what?Does this mean a new transformer, that would suck, since I just turned it on. and with a variac.
Hey Stephen, thanks for the reply.
Jac
edit:

oops:
no continuity on either pins. 4 & 5 and 1& 7.
6.3v (green wires) has continuity too ground

... is not good. two greens to 6.3V; green-yellow to ground. check the greens on the terminal strip are not on a lug that is connected to grond.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Hmm,

I'm wondering if I'm doing this right.
My meter has continuity with a buzzer.

Pins 4&5 have no continuity, nether do 1&7. The 6.3 line has continuity, but I can read 6.3v thru the sockets. Haven't done this before, obviously.
Thanks

The 6.3v's just went silent. Tranny fried. Sucks.
Stephen email me but use jerryrigstudio@gmail.com.
Thanks,
Jac

hmm,

what do you mean, if the greens are connected to ground? The terminal strip is attached to the chassis. So it's definately grounded. Should ib not?
Thanks

Opps,
I see as long as the 6.3v't aren't attached to the center lug, there is no ground connection. Back to it's fried.

jac,

You should have this document if Stephen sent you a kit.
http://www.trinityamps.com/ForumGallery ... g_v3.3.jpg
In the top righthand corner you'll see a scemo of the tranny.
The green/yellow is grounded. If you attach one lead of your meter to ground and set the meter on ohms / resistance, you should be able to put the other probe on each of the green wires and get approx .5 ohms on either one. That shows continuity thru that coil on the secondary. If you get zero , you have a short to ground . If you get nothing, you have an open circuit.

I'm reading 85ohms and 88ohms on the red wires with the ez81 in the socket and UNPLUGGED.
The yellow and the white both show no connection to ground.

If you get anything other than that , let us know. All of these measurements are with the amp unplugged and off.


LeeMo

hey Leemo,

Measured up and got this:
Green wires: 0.5 and 0.6
Red wires: 70.9 and 72.2 (EZ81 installed)

Thanks again for the help.
And I lucked out on my eyes, I have 20/20 with my glasses off (near-sightedness is bad though) and all I use in addition is the magnifying flouresent lamp. Good to go with that.

Lol, it's just the rest of my 90 year old body that's doing me in. Too bad I'm only 48.
Oh well, nice to be trying on the amps again.
I'm going to have to reread alot of books again. My memory keeps getting robbed. That sucks and is frustrating. So, again, Thank you.
Jac

jac,
Good to know that your secondaries are okay. Hmmm, I wonder why it was smokin' when you brought it up with the variac. Is there any signs of heat? Melted wires, brown paper?

LeeMo

what do you mean brown paper? I have brown paper sort of popping up at the sides.
The smoke is coming from the 110v black lines. Remember I was using the wrong version of the high voltage diagram. The one that showed the lines in reverse. My mistake but sucks.
Anyway the smoke came out of those 2 lines dead center.. Really never even got passed 90v on the power-up, smoked that bad.
Jac
Opps, just saw the heat.

The transformer's hot as hell. Don't touch the paper

Jac,

Reversing the wires wont hurt it - that's just line & neutral. there has to bea sgort in there somewhere. Disconnect the amp from the tranny and retry.

Good thing you have a variac!

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Well the paper surrounding the coils is brown. What I meant was DARK brown , as in a hot spot which would indicate a short in the coils.
Right now I'm speculating that there's a short in the primary , from what you've told us.
With the amp unplugged, I'm reading 3.5 ohms from the black lead to the black/white in the primary.

LeeMo

When the trasnformer was installed, it can be a tight squeeze to get the wires through. Is there any chance and of the wires are shorting to chassis?

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Hadn't thought of that Coco, I'm about to desolder the tranny. Let's find out.

Also, go figure, I finally figured out the new camera..
New pics up and Coco if you can't see these, time for new glasses.

http://jpritchard.photosite.com/

Time to make this amp sing, one way or another.

By the way, I'll have to put up a pick of my new guitar to go with the 18watt. Plays like butter.

here's an interesting thought.

For this build I've been using these small brass nut and bolt's (I like brass alot). Waht if they aren't grounding? Hmm, I think I'll switch to what you sent me Coco.

Jac

Can't hurt

btw' how's the pics?

Should make a difference really.

Pics are better, just havent had time to analyse yet.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

alright, I'll switch all brass back to what you sent.

Jac

leemo,

where'ed ya go

Eek , Should NOT make a difference really.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps