Reply #30 on: February 18, 2014, 02:33:46 PM
Once I have a little more time I will move the components as you have suggested Grainger and report back. Thank you for your continued input, it's much appreciated. Fabian, in answer to your question....I have both, hiss and hum even with the volume control at minimum settings. As far as I can remember, the amp was dead silent (at the speakers) at lower volume settings. The hum/hiss seemed to become audible at the speakers at about the 100 hour mark or so. The amp has just under 200 hours on it now. What perplexes me most at this point is the continued hum at the transformer, which disappears when you touch the transformer bell (not the transformer laminations). Nothing is loose. Additionally on startup a humming noise is heard through the speakers for about six to eight seconds then abruptly drops to a much lower level. I've obviously stuffed something up on the build...I'm determined to find it and fix it.
Jeff
Jeff Hullin
Stereomour(2A3), Eros, Crack/Speedball, Thorens TD160 MKII, Grace F9E, Sennheiser HD600's, Frugelhorn 3's, DIY 8" Subs.
If at first, the idea is not absurd, then there is no hope for it.