[QuadList] Tape Delay Systems

[David Crosthwait]

Tony Quinn's posting which included the picture identified as "abchot" was similar to NBC Burbank's VTR 13-15 delay for live shows such as "Real People", a once a week program feeding the East from studio 4. This delay was about 7 seconds long. Two RCA TR 70B's side-by-side had a loop that went basically vertical the entire length of the rack IIRC. If Standards and Practices didn't like something said, it could be deleted (at least audio wise) or with a cutaway shot if visual. I think NY had something similar.


Best Regards,

David Crosthwait
DC Video
www.dcvideo.com


On Apr 14, 2012, at 9:26 PM, Bill Carpenter wrote:

> Hi Folks,
> 
> I think the best engineered and best looking delay was produced by a San Francisco VHF station (I think it may have been a Westinghouse station?) where they used a pair of AVR-3's and cut a slot in the frame and the right side panel of the record machine and the left side of the play machine. 
> The machines were anchored and mechanically connected and the tape exited the record machine went around a roller guide (Idler) and then went up to the high ceiling and then across a couple of feet to the proper spot above the play machine and then back down to a similar roller guide where the tape made the 90 degree turn into the supply side of the play machine. The roller guides were used at each tape turn point. It was a precision designed system and worked well.
> I believe the goal was a 7-10 second delay for a live street interview that came in by microwave every weekday in the late afternoon.
> The controls for the two machines were integrated using the extensive remote editor controls that were part of the AVR-3's
> 
> I explained this system to Dave Rodahl (reel servo designer) and Al Trost (VPR-3 Project Engineer) in 1982 and we proved that the VPR-3's could be easily used as a similar tape delay system. I don't know it anyone ever tried it, but I knew it would work.
>  
> Bye for now, Bill & Gewyn & Ginger (whoof...whoof)
> From: Tony Quinn <tony at tqvideo.co.uk>
> To: quadlist at quadvideotapegroup.com 
> Sent: Saturday, April 14, 2012 7:33 PM
> Subject: Re: [QuadList] Quad mystery photo quiz of the week
> 
> In message <F6BA545D-47E5-411B-B6AE-ACB4DF59A089 at dcvideo.com>, David 
> Crosthwait <david at dcvideo.com> writes
> >Hi Bill,
> >
> >That's an interesting Compact Video story about that VR-3000/VR-1000
> >setup. Wish I could have seen it. Unfortunately that is not the machine
> >in the picture. The answer is coming tonight. It does remind me of a
> >story I was told last weekend over dinner by a friend who used to work
> >at WJZ channel 13 in Baltimore. He told me they had a tape delay rig
> >that recorded on a VR-1000 flat top feeding tape vertically to a
> >VR-1200. I would have loved to have seen that in operation!
> 
> Well before my time, but
> 
> http://www.vtoldboys.com/hotline.htm
> -- 
> "Remember how stupid the average person is, then realize that half of them are
> stupider than that.  - G. Carlin"
> 
> Please trim posts to relevant info when replying.
> 
> Change subject to reflect thread direction. Thanks.
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