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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Troubling comment from Mike Sanders (Quicksilver Audio) posted by audiophile121 on August 31, 2005 at 11:52:56:
Audiophile121,The manufacturer of tube equipment has a choice of various circuit board materials, as well as the copper weight in ounces.
Dynaco used cheap phenolic boards which will burn and scorch. And they used thin copper. Copper plated circuit boards are available in microscopic (i.e., ditigal cameras) thicknesses, to 2.0 ounce copper plate.
I personally use only the best grade of epoxy board, and heavy 2.0 ounce copper.
One poster mentioned that the traces can't handle as much current as a wire can. This is not true. A properly designed circuit board trace can handle virtually any current. Some manufacturers take the low road, and, to save money use the thinnest traces they can.
And there is another advantage: A well designed circuit board has a heat sink effect. Unlike point-to-point wiring, a tube will dissipate heat from the socket pins to the copper trace. The cooler the tube pins, the longer the life of the tube.
One final thought: Regardless of one's opinion of point-to-point wiring versus circuit boards, keep in mind that engineering plays a vital role in the reliablity of audio equipment. The world is full of electronic lemons.
Regards,
Mike
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Follow Ups
- Re: Troubling comment from Mike Sanders (Quicksilver Audio) - Septarnebula 13:56:17 08/31/05 (1)
- The amount of heat dissipating through tube pins is negligible. - sser2 18:07:28 08/31/05 (1)
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