trinityamps.com

Hi Guys,
I just started my first Trinity kit, and I want to make sure I'm doing this right. I have experience with pedals, and one other amp kit (Mojotone Champ that isn't currently working). I've wired the tube sockets twice now. Do the photos below look okay? Any advice would be greatly appreciated!









Thanks!

Ryan

Looks good so far!

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I have been a bit sidetracked lately and I have hit numerous “snags” in my build.

Problem #1
In populating the turret board, I discovered that one of the capacitor values does not match the layout drawing for the new Plexi. The capacitor goes in the open space here:



The capacitor that came with my kit is a 220uF 50v:



I ordered a 50uF 50v capacitor in case the above capacitor is incorrect. Will this work:





Problem #2
I have been working mostly from the layout drawing, and I failed to twist some of the transformer wires:



Does this now mean that I need to order a transformer and start over? I think the wires are now too short to twist.



Problem #3
Where do I connect the wires on the lamp terminals?



Any advice would be much appreciated, and if you seen something else wrong/weird on the pictures, please let me know!

1. Regarding the cap, the new versions apparently comes with the 220uF which should be the only difference. It thickens up the tone a bit.

I had the same thing and got the answer from Stephen.

So you should be all set with that.

2. The indicator light should have one leg connected to the 117 V on the transformer and the other one to the 0 on the transformer. Upper right on the transformer if you look at the coloured layout. Unless you are using 240v as I have, in that case have a look at my blog to see how I did it.

http://handwired.wordpress.com/2013/09/18/finishing-the-power-transformer/

I have documented more or less every step so you can browse through my build if you would like to compare your build with someone else.

I finished it up last week and it is built on the new black turret board so hopefully it should look similar to yours. It is a combo, not a head as yours but that should not make any difference as far as I know.

3. I believe you should twist the wires. I would twist them and solder on new wires if necessary, put heat shrink on the joint.


Good luck with the build!

Regarding the indicator light you can see on the layout that the black wire is going to the power switch and then continues to the transformer. The white wire is connector via the terminal strip.

Just to be really clear on this

Okay, thanks to thefretrunner (you rock!), I am finished. However, I have some new issues. I followed the power up procedure and was able to get a clean sound out of all 4 inputs (it's too late to crank it up, so I'm not sure if I'm getting crunch). I was not able to get my VRM to work, but I'm more concerned with my voltages.

V1
1. 7.5
3. .9
6. 7.6
8. .9

V2
1. 7.6
3. 1.0
6. 7.6
8. 3.3

V3
1. 7.6
2. .3
3. 7.9
6. 7.8
7. .3
8. 3.3

V4
3. 12.1
7. 355
9. 338

V5
3. 12.4
7. 352
9. 338

V6
1. 312
3. 367
7. 313

Any help would be great!

The plate voltages are way off. Check back from the plates to see where they change from low to high. Maybe you forgot a jumper on the board?

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

Will do! Here are some pics:













Thanks!

I rechecked the board with my DMM. Everything to the right of the boost switch terminals registers normal, but everything to the left of those terminals is way low. The furthest left terminal registered normal. Anyone see anything in the pics that I am missing, or do I need to cut out the board and start rewiring all of the jumpers? On the plus side, I'm getting lots of experience discharging the amp!

Did you install the under board jumper from the 2K2 2W to the + side of the second 16uf filter cap?
Measure the voltage at the + side of the 16 uf cap.

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

I'm getting 66.5. I also tried to jumper the two connections with alligator clips at the turrets and got the same reading.

Did you connect the first +16uF cap to the 2K2 2W resistor? What is the voltage on the other side of the 2K2 resistor?

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

I think you have too many wires coming off your stby switch. If I recall you break the connection to the b+ side of the cap . The wire runs from the switch to the b+ side of the vrm and then from the out side of the vrm goes to the cap.

Don't know if that will help your down stream voltage issue or not

Hi, sorry for the late reply (I was out of town)! I am getting 250 on the other side of the 2K2 resistor. I also disconnected the VRM (which was probably not connected in the right place) from the standby switch and can resistor. Any other suggestions? I appreciate the help!!!!

If you're getting the same voltage on either side of the resistor it sounds like a missing connection or ground on one side of the resistor.

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http://pdfelectronics.com

Something is way off! I measured all of the voltage on the board and here is what I found:



Does anything look right?

Something is wrong near the input (V1). Your voltages there are low and they are brining down the rest of the amp.

Look for wrong resistor values or maybe even a short.

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