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    Rolls HA43 Headphone Amp

    I am waiting on new Audio Technica ATH-A700 cans and noticed they were 64 ohms. Both my amps phone jacks are 100 ohms and my Dad's old Revox A-77 is 200/600 ohms. Noticed the specs on the Rolls 4 Channel Stereo Amp was 51 ohms each channel with 4 separate jacks and volume controls. It was not...
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    Revox A-77 MkIV Dolby Erase Problem

    Hi I have a A-77 Revox MKIV Dolby 10.5 reel to reel machine 4 track I am trying to erase some BASF 10"eels of recorded music that was recorded at 15ips my machie is a 7 1/2 or 3 3/4 . I set it up to record, with no signal coming in trying to erase tapes. This is my first reel to reel...
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    Tape to avoid??

    I just un packed my late Dad's Revox A-77 MkIV 4 track..... his notes say Ampex tape is messy, have to clean heads more ofter. Maxell "EE" tape is hard on the heads. Other maxell was OK... This machine is " Biased" to BASF 10.5" reels 2400 feet tape reels. Pop notes said the longer the tape...
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    Need basic's on Revox 4 Track

    I have my Dad's old Revox A-77 MkIV Dolby 4 track......... it's been 25 years from the last time I used it. It is "Biased" to BASF tape. I purchased a digital to analog converter. Makes good recordings. But how do I record on the other 1/2 of the tape. The book says turn the tape over? Ok...
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