where is the bias pin in my rebuilt dynaco st-70?
Posted: Sun May 27, 2012 9:20 pmHi all,
I'm totaly noob to tube. Recently I bought dynaco st 70 which is not stock one but rebuilt by Will Vincent. I want to replace the jj el34 with new kt77 tubes.
But the strange problem is that when I opened my front cover of my dynaso st 70, the bias pin on front socket, to which I will connect the wire of my multimeter, is not there. And the bias pin it not in the back or in the upper chassis also.
So how do I measure volt of my newly replaced kt77 tube?
You can see the image below (it's not mine but very as same as mine).
http://cdn.head-fi.org/7/74/7462d91c_dyna70.jpeg
Please help me. I need your help. Thank you.
I'm totaly noob to tube. Recently I bought dynaco st 70 which is not stock one but rebuilt by Will Vincent. I want to replace the jj el34 with new kt77 tubes.
But the strange problem is that when I opened my front cover of my dynaso st 70, the bias pin on front socket, to which I will connect the wire of my multimeter, is not there. And the bias pin it not in the back or in the upper chassis also.
So how do I measure volt of my newly replaced kt77 tube?
You can see the image below (it's not mine but very as same as mine).
http://cdn.head-fi.org/7/74/7462d91c_dyna70.jpeg
Please help me. I need your help. Thank you.
