[QuadList] PTL Club--Quad duplication 1974-78--What do you know?

[Glenn Gundlach]

TR-800 audio may have been bad but the TBC was the most pathetic contraption I've ever had to deal with. Set the SCH to 0 at 3pm and it may need adjustment by 3:30. We did come up with a repair that actually fixed the problem by eliminating the XOR phase comparator and replacing it with a charge pump type - ironically built by RCA in the CD4046 PLL chip. After the mod you could set the SCH on Jan 1 and you might want to check it in June. Changing the FF/REW tension from 12 Oz to 9 Oz slowed the acceleration some but got rid of the erratic tendency to snap tapes. The REAL lesson was the the operators LIKED these thing and complained when we got some VPR-6s and BVH-3000s. Video Stockholm syndrome?


G²



________________________________
 From: Ted Langdell <ted at quadvideotapegroup.com>
To: Quad List <quadlist at quadvideotapegroup.com> 
Cc: Del Holford <del.edits at gmail.com> 
Sent: Monday, July 1, 2013 10:14 PM
Subject: [QuadList] PTL Club--Quad duplication 1974-78--What do you know?
 


Greetings from the thermally active West... where the the Central Sacramento Valley was up into the 108+ range today while Pacifica, just south of San Francisco had 60 and a fog-bank around dinnertime.

Had an e-mail from Del Helford, a former Quad operator and later Quad editor at PTL who is trying to help a Univ. of Missouri professor with some history.

He was trying to come up with details about the duplication process a contractor or contractors used to make copies of the shows for bicycle distribution to stations.  He refers to it as high speed and as "magnetic duplication" and believes they "used NET in Washington and the Videotape Company (Atlanta?)" from 1974-78.

What does the collective memory of 150+ QuadList members recall?

I've referred him to the March, 2010 QuadList discussions about the Ampex ADR-150 and to several related SMPTE articles about contact duplication of Quad tape that appeared in the Journal.

Del notes he "was a videotape operator on RCA TR70c's at the PTL Television Network from 1977 until 1979 when I began to edit on a nixie tube RCA/Convergence Time Code Editor."

He adds, "The TR70c was a good machine and one of our engineers made them RS170a compliant for frame accurate editing.  Eventually PTL went to Ampex VPR2b's in 1981 although we had some AVR2's and I used one in 1988 to edit the 3/4" on IHRA Drag Racing for ESPN.  No losses on the dub to Quad or on the layback to RCA TR800 1" type C machines.

The TR800 had the worst audio pre-amps.  They copied Sony's TH1100A's and should have copied the audio section."
Del has more recent ties to Charlotte's PBS station.

Any help would be appreciated, and I've invited him to join the crowd in the tape room, here.

Cheers and stay cool.

Ted


Ted Langdell
Secretary
Skype: TedLangdell
e-mail:ted at quadvideotapegroup.com 



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