trinityamps.com

I guess I am working a little backwards here but I built a couple of amp monitor cabinets for a friend of mine out of canary wood. In the end I ended up keeping the second one which led me here. I decided to convert it to a guitar amp. Woodworking is my primary hobby but I do have a little electronics experience. Last night I spent a couple of hours building a jig for the build. I have the torret board populated. I will post pictures of of the jig and what I have completed shortly. Now I need to install the hardware into the chassis. My first newb question is on the sockets. Is a socket specific to a tube so does it matter which socket I install in each slot? The reason I ask is on the blank section with no terminal there is a number. Does this translate the the tube?

If it's a Trinity kit then all the tubes are the 9 pin type and all are the same.
Stew

So I finally found the time to finish soldering the TMB kit. As I went through the build I was using a tester to make sure my connection had 0 Ohms (no resistance) between the two connected points. I was assuming this was a good indicator of whether my solder joints where good or not. I have already tested the power transformer voltages and it looks good.

Now I want to test the tub socket plate voltages. Just so I am clear. You do NOT install the tubes, I turn the Stand By switch on and turn on the power? For this test do I need to connect the speakers? I assume not.

Follow the startup procedure in the manual.
1. No tubes - power on measure AC voltages.
2. Install rectifier tube - power & standby on, meausre DC , B+ voltages
3. Install remaining tube - Connect Speaker, Vol at minimum, power & standby on, meausre DC voltages.

etc.

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

When I first took meter readings of the DC voltages I found the readings to be high. I was not getting any sound out of the amp on any channel so I reheated all connections to make sure all the joints had good contact. My next round of meter readings were much better. I connected a guitar to the clean channel and it works like a charm

The problem I have is still no sound on the other channel. I pulled the inputs out and re-soldered the joints. When I checked the group points I was reading zero resistance so they checked out. When I plug in a cord to the low input and turn up the volume this is a little bit of noise and when I touch the other end of the cord there is a faint buzz. The high input has a much louder noise at high volume and when I touch the other end of the cord there is a much louder buzz.

Here are my DC voltages:

V1 12AX7
Pin 1: 140 (155)
Pin 3: 1.00 (1.0)
pin 6: 143 (155)
pin 8: 1.00(1.0)

V2 12AX7
Pin 1: 148 (180)
Pin 3: 0.003 (1.5)
pin 6: 264 (272)
pin 8: 148 (180)

V3 12AX7
Pin 1: 207 (220)
Pin 2: 51.1 (52)
Pin 3: 74 (75)
pin 6: 214 (217)
pin 7: 52 (62)
pin 8: 74 (75)

V4 EL84
Pin 3: 12.26 (12)
pin 7: 348 (345)
pin 9: 336 (340)

V5 EL84
Pin 3: 12.29 (12)
pin 7: 347 (345)
pin 9: 336 (340)

V6 EZ81
Pin 1: 311 (292)
Pin 3: 359 (350)
pin 7: 305 (292)

Any suggestions?

No suggestions? I ordered a couple of new tubes so I will give that a try. I may also replace the two resisters on V2 in case they are damaged.

V2 12AX7 - Pin 3: 0.003 (1.5) is too low. Check that the ground on the cathode resistor/cap is connected to ground. I suspect not.

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

I replaced the 100 and 470ohm resistors on V2 and here are my voltages:

Here are my DC voltages:

V1 12AX7
Pin 1: 166 (155)
Pin 3: 0.085 (1.0)
pin 6: 143 (155)
pin 8: 1.00(1.0)

V2 12AX7
Pin 1: 146.7 (180)
Pin 3: 0.092 (1.5)
pin 6: 268 (272)
pin 8: 146 (180)

V3 12AX7
Pin 1: 215 (220)
Pin 2: 49.9 (52)
Pin 3: 72.6 (75)
pin 6: 217 (217)
pin 7: 50 (62)
pin 8: 72 (75)

V4 EL84
Pin 3: 12.3 (12)
pin 7: 350 (345)
pin 9: 338 (340)

V5 EL84
Pin 3: 12.33 (12)
pin 7: 349 (345)
pin 9: 337 (340)

V6 EZ81
Pin 1: 305 (292)
Pin 3: 362 (350)
pin 7: 308 (292)

When I plug in the guitar cord to the dirty channel and touch the other end the hum sound decreases. On the same channel is I turn the master volume all the way up and the second volume control to 3/4 this is a whining sound. The clear channel still works great.

Any suggestions?

I reviewed the wiring for the TMP input jacks and I found my error.
After rewiring it it is working like a charm. We have ignition..