No subjectFri Oct 13 12:51:02 CDT 2006
capacitors were rated at 20 % tolerance. I have no way of verifying how accurate this 20% rating claim is. I went and checked the old wax capacitors that were originally in my 1962 C3 but there was no tolerance rating written on them. I checked the red mylar caps and transformer coil filters tray ( originally from a 1970 T-300 ) that are now in my C3 and I checked the red mylar caps in my late 60's / early 70's L-143 and these do have a 10 % tolerance rating written on them. Earlier this year I measured the mfd values of the red mylar capacitors that are now in my C3 and all of these capacitors are well within 10 % of their 0.255 mfd and their 0.1 mfd ratings so therefore these red mylar caps would more or less still be properly matched to their transformer coil filters. The ESR is another factor to consider but I am not sure how this actually affects the output levels of the TG notes . From what I have read , the wax caps had higher ESR than the modern capacitors so therefore it would be very interesting to compare the output levels readings if a brand new wax cap with high ESR and a new modern capacitor with low ESR but that both capacitors have an EXACT identical mfd value were tested on TG note filters throughout the various frequencies in the TG notes 49 to 91 range. Has anyone done this or can anyone explain how the ESR factor affects the output levels or the resonance of the filter ? END OF PART 2-A
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