| Author |
Message |
Steve Guidry
Guest
|
 Posted:
Sun Oct 02, 2005 6:16 pm Post subject:
VTR Losing servo lock |
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I recently shot a VHS tape (no sneers, please) (grin) with my ooooolllld
camera and its JVC RS-s411 dockable. The room was hot and humid.
I didn't get a dew indication or shutoff, but periodically the camera was
surging and then re-locking. This was accompanied by a picture breakup and
re-lock on the video coming out of the video confidence spigot. This is a
new one for me . . .
Is there any way to defeat the auto-sensing speed control of a playback deck
to minimize this problem ? (I'd like to play it at the same constant speed,
and ignore the speed fluctuations on the playback.) And is this likely to
accomplish a smooth playback ?
Do you have any other suggestions ?
--
Steve Guidry
Video Works, Inc.
Live events for TV and Video
www.videoworksinc.com
800.844.4404
--
Steve Guidry
Video Works, Inc.
Live events for TV and Video
www.videoworksinc.com
800.844.4404
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Richard Crowley
Guest
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| Posted:
Sun Oct 02, 2005 6:54 pm Post subject:
Re: VTR Losing servo lock |
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"Steve Guidry" wrote ...
| Quote: | I recently shot a VHS tape (no sneers, please) (grin) with my
ooooolllld
camera and its JVC RS-s411 dockable. The room was hot and humid.
I didn't get a dew indication or shutoff, but periodically the camera
was
surging and then re-locking. This was accompanied by a picture
breakup and
re-lock on the video coming out of the video confidence spigot. This
is a
new one for me . . .
|
Hot and humid doesn't necessarily mean trouble if the
equipment was properly "acclimatized". But moving
quickly between cool/dry and hot/humid is what causes
condensation.
Are you sure what you saw was condensation and not some
other problem (like dirty/damaged tape path, etc.)?
| Quote: | Is there any way to defeat the auto-sensing speed control of a
playback deck
to minimize this problem ? (I'd like to play it at the same constant
speed,
and ignore the speed fluctuations on the playback.) And is this
likely to
accomplish a smooth playback ?
|
Some of the specialty dubbing places might have rigged
a tape deck to run at a ~constant speed and ignore temporary
perburberances of the control track, but this might be a long-
shot? Sounds worse than any normal TBC can handle. |
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Pat Horridge
Guest
|
| Posted:
Mon Oct 03, 2005 4:33 pm Post subject:
Re: VTR Losing servo lock |
|
|
"Steve Guidry" <steveguidry@earthlink.net> wrote in message
news:85R%e.7026$vw6.3709@newsread1.news.atl.earthlink.net...
| Quote: | I recently shot a VHS tape (no sneers, please) (grin) with my ooooolllld
camera and its JVC RS-s411 dockable. The room was hot and humid.
I didn't get a dew indication or shutoff, but periodically the camera was
surging and then re-locking. This was accompanied by a picture breakup
and
re-lock on the video coming out of the video confidence spigot. This is a
new one for me . . .
Is there any way to defeat the auto-sensing speed control of a playback
deck
to minimize this problem ? (I'd like to play it at the same constant
speed,
and ignore the speed fluctuations on the playback.) And is this likely to
accomplish a smooth playback ?
Do you have any other suggestions ?
--
Steve Guidry
|
The problem is that during record if the servo lost lock and speeded up or
slowed down the rate of frames captured on the tape would now be wrong.
Playing back at a contant rate probably wouldn't help.
In fact the video heads writing onto tape during those wrong tape speeds
will be very difficult if not impossible to re-create at playback.
Sounds like a servo fault on the VTR section to me. |
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Steve Guidry
Guest
|
| Posted:
Mon Oct 03, 2005 8:46 pm Post subject:
Re: VTR Losing servo lock |
|
|
I agree that it was a servo problem in teh record section. The predecessors
to these decks (the 410's) were notorious for this problem. BUt this is the
first time I noticed it on these.
How about using some keyframe stabilizer or tracking feature of Photoshop or
some other program ? Will this work ?
Steve
"Pat Horridge" <pat@remove-spam.vet.co.uk> wrote in message
news:dhr4t2$rmq$1$8300dec7@news.demon.co.uk...
| Quote: |
"Steve Guidry" <steveguidry@earthlink.net> wrote in message
news:85R%e.7026$vw6.3709@newsread1.news.atl.earthlink.net...
I recently shot a VHS tape (no sneers, please) (grin) with my ooooolllld
camera and its JVC RS-s411 dockable. The room was hot and humid.
I didn't get a dew indication or shutoff, but periodically the camera
was
surging and then re-locking. This was accompanied by a picture breakup
and
re-lock on the video coming out of the video confidence spigot. This is
a
new one for me . . .
Is there any way to defeat the auto-sensing speed control of a playback
deck
to minimize this problem ? (I'd like to play it at the same constant
speed,
and ignore the speed fluctuations on the playback.) And is this likely
to
accomplish a smooth playback ?
Do you have any other suggestions ?
--
Steve Guidry
The problem is that during record if the servo lost lock and speeded up or
slowed down the rate of frames captured on the tape would now be wrong.
Playing back at a contant rate probably wouldn't help.
In fact the video heads writing onto tape during those wrong tape speeds
will be very difficult if not impossible to re-create at playback.
Sounds like a servo fault on the VTR section to me.
|
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| Back to top |
|
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Steve Guidry
Guest
|
| Posted:
Mon Oct 03, 2005 8:47 pm Post subject:
Re: VTR Losing servo lock |
|
|
I don't think it was dew or moisture. My best guess it that some belts were
slipping or maybe a component in the speed control section was
intermittently failing because of the heat.
Steve
"Richard Crowley" <rcrowley@xpr7t.net> wrote in message
news:11jvplkue3ee04@corp.supernews.com...
| Quote: | "Steve Guidry" wrote ...
I recently shot a VHS tape (no sneers, please) (grin) with my
ooooolllld
camera and its JVC RS-s411 dockable. The room was hot and humid.
I didn't get a dew indication or shutoff, but periodically the camera
was
surging and then re-locking. This was accompanied by a picture
breakup and
re-lock on the video coming out of the video confidence spigot. This
is a
new one for me . . .
Hot and humid doesn't necessarily mean trouble if the
equipment was properly "acclimatized". But moving
quickly between cool/dry and hot/humid is what causes
condensation.
Are you sure what you saw was condensation and not some
other problem (like dirty/damaged tape path, etc.)?
Is there any way to defeat the auto-sensing speed control of a
playback deck
to minimize this problem ? (I'd like to play it at the same constant
speed,
and ignore the speed fluctuations on the playback.) And is this
likely to
accomplish a smooth playback ?
Some of the specialty dubbing places might have rigged
a tape deck to run at a ~constant speed and ignore temporary
perburberances of the control track, but this might be a long-
shot? Sounds worse than any normal TBC can handle.
|
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|
| Back to top |
|
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Toby
Guest
|
| Posted:
Wed Oct 05, 2005 7:33 pm Post subject:
Re: VTR Losing servo lock |
|
|
What about a TBC? I guess it has limits, but it might worth a try.
Toby
"Steve Guidry" <steveguidry@earthlink.net> wrote in message
news:4nc0f.8894$q1.1768@newsread3.news.atl.earthlink.net...
| Quote: | I agree that it was a servo problem in teh record section. The
predecessors
to these decks (the 410's) were notorious for this problem. BUt this is
the
first time I noticed it on these.
How about using some keyframe stabilizer or tracking feature of Photoshop
or
some other program ? Will this work ?
Steve
"Pat Horridge" <pat@remove-spam.vet.co.uk> wrote in message
news:dhr4t2$rmq$1$8300dec7@news.demon.co.uk...
"Steve Guidry" <steveguidry@earthlink.net> wrote in message
news:85R%e.7026$vw6.3709@newsread1.news.atl.earthlink.net...
I recently shot a VHS tape (no sneers, please) (grin) with my
ooooolllld
camera and its JVC RS-s411 dockable. The room was hot and humid.
I didn't get a dew indication or shutoff, but periodically the camera
was
surging and then re-locking. This was accompanied by a picture breakup
and
re-lock on the video coming out of the video confidence spigot. This
is
a
new one for me . . .
Is there any way to defeat the auto-sensing speed control of a playback
deck
to minimize this problem ? (I'd like to play it at the same constant
speed,
and ignore the speed fluctuations on the playback.) And is this likely
to
accomplish a smooth playback ?
Do you have any other suggestions ?
--
Steve Guidry
The problem is that during record if the servo lost lock and speeded up
or
slowed down the rate of frames captured on the tape would now be wrong.
Playing back at a contant rate probably wouldn't help.
In fact the video heads writing onto tape during those wrong tape speeds
will be very difficult if not impossible to re-create at playback.
Sounds like a servo fault on the VTR section to me.
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