Solid States Devices > TPU builders
Deciphering the TPU in 2008
BEP:
BTW:
That disconnect probe enclosed in a metal box....... You may want to put some distance between the tested circuit and your equipment soon.
I have six scopes. Two of them work right now.
Bruce_TPU:
Hi Eldarion,
You may need to build a cage for your controller, and use Shielded Coax for the output, and keep the Controller 6' away from the device. If the controller were tiny, then as BEP said, the center would be best. I earnestly believe that it will not stay in catalyst because of the "noise" that goes to the output signal, and ruins it, as soon as it starts. Shielding, screening, and distance. And juice the mag bias. I think the combo of both.
Progress is sweet,
Bruce
BEP:
@Bruce,
You missed my point. One of the beauties of a simple tube amplifier is that it will incorporate noise and any other close energy into it's output and clean it up in the process.
I wouldn't change any biasing, magnetic or otherwise, yet. Simply place the coil under or above the noisy electronics and see if the DC float is more frequent. If it is then use that unconnected probe to check for a dielectric gradient in and around the coils. There should be a definite pattern.
I suspect higher potential radially than axially.
Bruce_TPU:
--- Quote from: BEP on May 15, 2008, 04:22:12 AM ---@Bruce,
You missed my point. One of the beauties of a simple tube amplifier is that it will incorporate noise and any other close energy into it's output and clean it up in the process.
I wouldn't change any biasing, magnetic or otherwise, yet. Simply place the coil under or above the noisy electronics and see if the DC float is more frequent. If it is then use that unconnected probe to check for a dielectric gradient in and around the coils. There should be a definite pattern.
I suspect higher potential radially than axially.
--- End quote ---
I certainly did misunderstand. ;) I understand what you mean now. A very good experiment idea, indeed. Makes one wish for a simple tube amp about now. But hopefully we can get it to maintain catalyst, and placing the coil above or below will do this. That would be a quick solution.
Progress of great minds endeavoring for one goal,
Bruce
BEP:
My intial experiment, along these lines consisted of a round voice coil sandwiched between two round magnets (the ones with holes in the middle).
I got nothing, of course, until I put a noise source in the center of the coil, also between the two magnets. The noise source is a DC/DC converter for powering Geiger counter tubes. 12 in - 2500 out - nice little blue spark maker. You activate the spark and you have DC from the coil - low voltage but useable current.
My suggestion will just tell me if we are along the same path. If right, we can talk about magnetic fields.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version