[QuadList] Servo Modes

[David Crosthwait]

Trevor,

I too have received many 2" quad edited masters over the years with hand-written notes on them saying "Play in auto to H. mode", usually due to inherent breakup (recorded-in) or known flakey splices. 

On an Ampex side note, here were your VR-1000 w/intersync servo mode choices:




Best Regards,

David Crosthwait
DC Video
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On Aug 23, 2012, at 6:43 AM, Trevor wrote:

> 
> Hi Chris:
> 
> I have a VR-1200 that has a mod so that in H-lock mode, it functions exactly
> as you have described for the RCA LineLock.  It's a small circuit board
> added in the control panel.  Basically an NE555 timer controlling mode
> selection when Play is activated and the servo selector is set for H-lock
> mode.
> 
> Problem tapes often have play back in horiz on the paperwork
> Ok for an Ampex, but for an RCA they are best played in Pixlock
> The RCA servo's or at least the analogue ones are poor at recovering from
> disturbances in Line Lock
> 
> The logic was that Servo lock could be regained quicker if the tape could be
> sycronised with station horizontal reference only 
> Rather than going through the full frame lock loop, and for Ampex that might
> be the case, but for RCA this was not the case 
> 
> Remember this advice is coming from a Pal Country, and may not be the case
> for NTSC
> 
> TrevorB
> UKmember
> 
> 
> 
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