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In Reply to: Re: why teflon insulation? posted by The Bastard with The Hammer on March 26, 2007 at 05:27:40:
Waaaay back in the ancient days ca. early 1970's Walt Jung and Dick Marsh published a two-part article in AUDIO magazine (now defunct) titled "Choosing Capacitors for Audio". In that article they established a hierachy of the efficacy of various types of insulation. Teflon was at the top of that hierachy. They also commented on the supremacy of teflon insulation because it absorbed the smallest amount of the charge (signal) exposed to it, They stated that all insulations were plagued by "dielectric absorbtion", the dielectric being the type of insulation under consideration, wherein a wire or other type of conductor's insulation absorbed a portion of that charge and later gave up that charge in stages similar to tossing a rock into a pond, the resulting continuing ripples (my analogy) representing the dielectric giving up the charge it had stored (dielectric absorbtion). This resulted in adding distortion to the signal somewhat like a continuing echo. Since teflon had the lowest dielectric absorbtion it obviously became the best insulation. However, teflon is available in a number of D.A. grades. The lowest I know of is D.A. of 1.0, but is rare and very expensive. A D.A. of 2.0 is a good choice and tap dances on FR4 pcb material which, electrically, is garbage. Some time after reading that article I was building a preamp featured in Audio Amateur which had a rather small main pcb. After completing the unit using the standard glass/epoxy FR4 pcb I bought some teflon pcb material that was double clad copper D.A. 2.0 and built a second unit etching off the top layer of copper (BIG MISTAKE I later learned). The 2 units were identical except for the pcb material. The teflon pcb unit smoked the FR4 unit in sonics. A number of months later I saw one of the top tier commercial preamps was being offered in an "A" unit and a "B" unit. The "A" unit cost $200.00 more (in 1980 dollars) than the "B" unit. The diference ? The "A" unit had teflon phono stage pcbs. Free Tip : if any of your equipment has a wiring harness seperate the wires of the wiring harness as far apart as space allows (I have used notched popsicle sticks to hold the wires apart) and you wil be amazed at the improvement in sonics and resolution of fine detail.Happy Insulating !
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Follow Ups
- Re: why teflon insulation? - pkell44 12:34:17 04/18/07 (0)
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