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Started by Clyde, June 16, 2015, 06:41:20 PM
QuoteI'm seeing more & more posts in various forums about owners in search of replacements for whatever reason.
Quote from: J M Fahey on August 14, 2015, 10:41:52 PMEDIT: in a nutshell:a) they originally use 8 ohms speakers, (or 2 x 16 ohms) so if you have original speakers or replaced them with other brand 8 ohms ones, fine, you have changed nothing except improve sound quality.b) the amp design and parts used stands way more, I have personally loaded them with 4 ohms and got around 20V with no ill effects.The transformers I tested were fine, warm but not *hot* .Same with heatsinks.c) in theory you can turn that amp into a 50W or more one, *if* you provide better supply (beefier transformer and higher voltage electrolytics) and mount transistors in a "real" extruded finned heat sink, and adjust dropping resistors values to still feed +/- 15V to preamp.I haven't modded original ones but straight built new ones, with the beefed up supply and heatsinking I mentioned, for killer 50/60W combos.
Quote from: pinkjimiphoton on August 31, 2021, 01:02:18 PMsince i can't seem to get a reading for any voltages at pins 4 and 8, and no output after the 1458, should i assume the opamp is toast? a shorted opamp would make it so i get no voltage readings anywhere, wouldn't it?