First, thanks go to Victor for getting the kit to me so quickly. Your customer service is always top notch.
When I first got the kit, I thought I bit off more than I could chew. But I have gone slowly. Despite that, I caught at least two wiring mistakes during final review and sorted them out prior to applying power.
I have powered it up and nothing has exploded or caught on fire. So far so good.
I am posting my voltages below. As you can see, most everything looks within range. One of my concerns is that I have roughly about a 15% imbalance between the two 12au7s.
Is this a concern? If so, where do I start to try and track it down.
I haven’t tried any music yet to see if it actually works yet. I’d like to sort out the above prior to buttoning it up.
When I first got the kit, I thought I bit off more than I could chew. But I have gone slowly. Despite that, I caught at least two wiring mistakes during final review and sorted them out prior to applying power.
I have powered it up and nothing has exploded or caught on fire. So far so good.
I am posting my voltages below. As you can see, most everything looks within range. One of my concerns is that I have roughly about a 15% imbalance between the two 12au7s.
Is this a concern? If so, where do I start to try and track it down.
I haven’t tried any music yet to see if it actually works yet. I’d like to sort out the above prior to buttoning it up.
Attachments
I think your UP2L and UK2L is below the range..
Can you swap 12AU7 and measure the test points again?
Can you swap 12AU7 and measure the test points again?
Swapped tubes. New readings
Up2l = 200. Up2r = 215.
Uk2l = 7.2. Ukr2 = 8.5
With a different set of tubes
Upl2 = 199 Upr2 = 220
Uk2l = 8.2. Ukr2 = 9.1
Up2l = 200. Up2r = 215.
Uk2l = 7.2. Ukr2 = 8.5
With a different set of tubes
Upl2 = 199 Upr2 = 220
Uk2l = 8.2. Ukr2 = 9.1
Awesome. Thank you Victor.
I’ll get it buttoned up tomorrow and put some music through it. I’ll even be brave enough to put in the WE300b tubes now. I was using cheap tubes to test.
Will report back then.
I’ll get it buttoned up tomorrow and put some music through it. I’ll even be brave enough to put in the WE300b tubes now. I was using cheap tubes to test.
Will report back then.
Well, I couldn’t wait until tomorrow. Plugged it in for a test run. Still haven’t put the good tubes but just had to know if it works.
It is producing music. Man, what a great and fun kit. Can’t wait to get it burned in. Will go back in tomorrow to clean up wiring with zip ties, put the good tubes in and enjoy.
Thanks again my friend. You are a pleasure.
It is producing music. Man, what a great and fun kit. Can’t wait to get it burned in. Will go back in tomorrow to clean up wiring with zip ties, put the good tubes in and enjoy.
Thanks again my friend. You are a pleasure.
Attachments
Hi. I think you are referring to the lite purple wires that go the terminal strip next to the choke.
Those are from the power transformer and are not used in this project.
Be careful with them. They do have high voltage on them.
Those are from the power transformer and are not used in this project.
Be careful with them. They do have high voltage on them.