Horizontal lines in VCR picture

[larry moe 'n curly]

With some of my damaged tapes I get horizontal lines, anywhere from
1/4" to 2" thick, that slowly move down the screen.

With some VCRs, like a Panasonic PV-V4521, those lines look like white
static, but with others, like the last standalone Sanyo I could find,
the lines are merely distortions in the picture.
How did Sanyo do that? Both of these VCRs are hi-fi stereo and have
4- video heads.

 

[Arfa Daily]

With some of my damaged tapes I get horizontal lines, anywhere from
1/4" to 2" thick, that slowly move down the screen.

With some VCRs, like a Panasonic PV-V4521, those lines look like white
static, but with others, like the last standalone Sanyo I could find,
the lines are merely distortions in the picture.
How did Sanyo do that? Both of these VCRs are hi-fi stereo and have
4- video heads.

Possibly because the dropout compensator is a more sophisticated design
using memory rather than a delay line ??

Arfa

 

[hr(bob) [email protected]]

Possibly because the dropout compensator is a more sophisticated design
using memory rather than a delay line ??

Arfa

I agree.

H. R.(Bob) Hofmann

 

[b]

With some of my damaged tapes I get horizontal lines, anywhere from
1/4" to 2" thick, that slowly move down the screen.

With some VCRs, like a Panasonic PV-V4521, those lines look like white
static, but with others, like the last standalone Sanyo I could find,
the lines are merely distortions in the picture.
How did Sanyo do that? Both of these VCRs are hi-fi stereo and have
4- video heads.

I remember when VCRs appeared with the 'HQ' tag and being amazed at
how few comet tails and dropouts there were compared to machines from
only a couple of years earlier... presumably those had much better
dropout compensators.
-B