The statment was correct. A head tracks one field and B head ,the other field,together one full frame of video is produced. If you have any Panasonic vcr manuals from the late 70's there is a full and accurate explaination of VHS princples in those manuals.Very useful to a new tech interested in learning the basics of VHS recording...Most of us have probably thrown them out by now..Kerry,KER-TEK ================================= Help make your TechAssist database better! Submit your fixes here: http://circuitwork.com/techassist/tip/#tips ================================= To UNSUBSCRIBE your email address, click here: mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe