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« on: April 13, 2011, 10:54:50 PM »
Hey jeri.
I actually have all three units running. The 100A was fixed and calibrated and it's the quietest of the three, probably due to calibration. It has all new caps. It's not suited for mixing of a processed and unproccessed signal because the 2 channels probably use the same section for the dolby. The 100's are different and they have separate channels for dolby. The 100 I got last week looks like it was well cared for and I see a number of parts were replaced individually. I just finished recapping the other 100 and it seemes to be OK. I'll be sending it off to be calibrated in the future.
The manual mentions that one of the side effects of dolby, high frequency loss, can be a benefit in some cases. It says it can be used as a high filter. That's basically what I'm doing by mixing the dolby and non-dolby sound through a mixer.
I don't know about the Barclay Crocker and Ampex Dolby Tapes but I would think these Advents can be useful to anyone interested in tapes. They bring out low overtones in a nice way and they sound much better than low eq boost, to my ears anyway.
Atlas Audio repair did an excellent job.