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Ted Kendall · 6th Jan 2011, 7:52 pm

Exactly - and I didn't say that the B67 discrete front end drives a 931 - it drove an IC configuration not unlike the A700 rep amp, but the chip in question was the 5534. The 931 was not a particularly happy chip as it turned out, hence Revox's recommendation that it be replaced by a 5532 if it failed. However, the A700 rep amp and one location in the A720 tuner-preamp were not recommended for this mod, the suggestion being that functioning 931s be found elsewhere in the equipment and the substitute IC used in one of the non-critical positions.

6th Jan 2011, 7:52 pm	#18
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,675	Re: Revox A700 repro IC Exactly - and I didn't say that the B67 discrete front end drives a 931 - it drove an IC configuration not unlike the A700 rep amp, but the chip in question was the 5534. The 931 was not a particularly happy chip as it turned out, hence Revox's recommendation that it be replaced by a 5532 if it failed. However, the A700 rep amp and one location in the A720 tuner-preamp were not recommended for this mod, the suggestion being that functioning 931s be found elsewhere in the equipment and the substitute IC used in one of the non-critical positions.