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Old July 6th, 2009, 04:10 PM   #8 (permalink)
Wally
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Join Date: Mar 2003
Location: Lubbock, TX
Posts: 6,010
Dave, if you have checked the serial number against that info on the site to which I linked you; then you will know that that SR is from no earlier than the mid-'70's. The push/pull MV is the giveaway there. IF you read 70 watts under the speaker jack, then it is an ultra-linear model from 'the late '70's.
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