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Which Eico do you guys love? | Audiokarma Home Audio Stereo …
2019年2月25日 · I have experience with the hf-81, hf-86, hf-87, st-70 and st-40. The 86 and 87 are amp only, but with level adjustments, the 81, 70 and 40 are integrated with preamps. All would be worth the effort to restore and listen to.
Eico Manuals and User Guides
All-Guides Database contains 79 Eico Manuals (189 Devices) for Free Downloading (PDF).
HF-85 Rebuild advice | Page 2 - diyAudio
2007年2月12日 · The original Eico design of the HF-85 is woefully inadequate in B+ filtering, such that most stock units will exhibit a slight 120 Hz hum in the output as a result. Using a 50/50 uF will help, but the real answer is to split the 10K B+ dropping resistor into two 4.7K sections, and add another filter cap section in the middle where the two ...
Eico HF-52. Is it any good? - diyAudio
2019年5月22日 · The HF-52 is an excellent integrated. Some folks consider the OPTs used in the HF-52 and HF-50 to be even better than the Acro TO-330 used in the HF-60. If I were you, I would strip it of all parts and then rebuild it as just a power amp using the HF-50 schematic.
EICO HF-20 - Rebuild - Questions - Help along the way?
2025年2月27日 · Anyone with experience with the HF-20? Any carbon comp comp resistors out of spec should be replaced. I usually find enough of them out of spec that I've just gotten to the point I replace them all on sight. If a few are put of spec, how long before more become off as well. 5% carbon film or .1% to 1% metal films will do nicely.
Eico HF-81 C23 C24 Value change - diyAudio
2022年12月4日 · WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. the safety precautions around high voltages. Hello all, It's my first post here! C23 and C24 in the Eico HF-81 in question here. Schematic found here: https://www.thetubestore.com/lib/thetubestore/schematics/Eico/Eico-HF-81-Owner …
Eico HF-20 THD Evaluation - Audiokarma Home Audio Stereo …
2021年2月25日 · My bedroom stereo has two monaural integrated Williamson amplifiers. One is an Eico HF-20 and the other was made by Elmat but appears to be an HF-20 clone. The Elmat has the same tube lineup and controls as the Eico but the power transformer appears different. I was curious about the THD of these amplifiers.
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