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paulsherwin · 17th Apr 2018, 10:35 am

The correct way to set the speed is to use a commercially produced test tape and frequency counter, but I didn't have access to those, so this what I did.

Generate some suitable tone on a computer, and burn it to an audio CD. Record the CD onto a cassette using a known good cassette deck. Play the cassette in the deck to be adjusted listening on one ear of a pair of headphones, while playing the CD over speakers. Adjust the motor speed until the tones are the same, and then adjust for zero beat.

You probably don't need to worry about this with your TP79 unless the speed is grossly out, and it may not be easily adjustable anyway, but I normally do it with hifi decks.

17th Apr 2018, 10:35 am	#19
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,931	Re: Bush TP79 cassette The correct way to set the speed is to use a commercially produced test tape and frequency counter, but I didn't have access to those, so this what I did. Generate some suitable tone on a computer, and burn it to an audio CD. Record the CD onto a cassette using a known good cassette deck. Play the cassette in the deck to be adjusted listening on one ear of a pair of headphones, while playing the CD over speakers. Adjust the motor speed until the tones are the same, and then adjust for zero beat. You probably don't need to worry about this with your TP79 unless the speed is grossly out, and it may not be easily adjustable anyway, but I normally do it with hifi decks.