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Old 01-11-2017, 09:33 AM
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Kamakiri Kamakiri is offline
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RCA TCR-100 Videotape Cartridge System, amazing!!

Check this out! Was this ever the "norm" for TV stations?

https://www.youtube.com/watch?v=wM_2upiGUO0
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Old 01-11-2017, 12:10 PM
Retspin Retspin is online now
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Quote:
Originally Posted by Kamakiri View Post
Check this out! Was this ever the "norm" for TV stations?



https://www.youtube.com/watch?v=wM_2upiGUO0


I think they were quite common. The first TV station I ever visited had one and was amazing to watch.
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Old 01-11-2017, 12:18 PM
centralradio centralradio is online now
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Thanks. This reminds me of the Drake Chenault automation systems at radio station in the 1970's.
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Old 01-11-2017, 02:28 PM
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Yes, quite common. Either that or the competing similar unit from Ampex until Sony's Betacart came out in the '80's which used 1/2" Betacam tapes.
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Old 01-11-2017, 03:25 PM
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Thanks. This reminds me of the Drake Chenault automation systems at radio station in the 1970's.
Indeed. We used the IGM automation system @ K-105 and ran Drake Chenault's XT-40 in the 70's.
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Old 01-11-2017, 03:30 PM
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Only a few of the 2" cart machines found their way to the UK for use by the ITV companies. Their main use was for playing out commercials so the BBC had no use for them.

There's an interesting snippet at the end of that video showing the facilities at ITN, London. At 8:37 you can see the huge analogue PAL<>NTSC converter. This was built by Pye to a BBC design. The BBC prototype, the world's first all electronic field store converter, was available just in time for the 1968 Mexico Olympics. THis was the first that had the possibility of live worldwide coverage.

The converter occupied 7 full height 19" rack cabinets. The storage medium was quartz delay lines, each giving 3.2ms delay. Like a monstrous version of the commonplace PAL delay lines. They were multifaceted quartz polygons, the signal being transmitted by a transducer on one face and bounced around many times until it reached the receiving transducer. They were in temprature controlled cabinets to keep the delay constant.

The line rate conversion was handled by a pair (one each for Y and C) of linestores. These were based on the earlier BBC analogue 625 to 405 converter. In very crude terms these were a pair of electronic multiway switches connecting to a bank of 576 capacitors, one for each pixel (except the term pixel hadn't been invented at the time).
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Old 01-13-2017, 08:08 AM
kf4rca kf4rca is offline
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Our station had 2 TCR's

RCA won an emmy in'69 for the invention. Turner had 6 Ampex ACR25's at one time.
Actually the networks edited their commercials into the playback tape. This way they were able to time the whole show and send TWX's to the stations as to the exact time a spot would air. Also there would be no surprises due to mechanical malfunction. This only made sense because the spots airing were going for maybe $100K for 30 seconds. As you might expect, the networks were rolling in the dough. They EVEN paid for the microwave link from AT&T to get the signal into the affiliates.
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Old 01-14-2017, 12:05 PM
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These were amazing! Our stations had them, and they performed very well!
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Old 01-14-2017, 04:05 PM
kf4rca kf4rca is offline
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There were more TCR100's out there than Ampex ACR25's. The reason was cost. As I recall the TCR's were about $160K where the ACR25's were $250K. Also the TCR parts were interchangeable with the existing RCA machines (TR70, TR60, TR600 etc.) The Ampex ACR25's were not compatible with other Ampex quads.
The TCR took 2 seconds to lock up.where the Ampex ACR was 300 milliseconds. The TCR carts would only hold 3 minutes of tape where the ACR carts held more. it was no surprise when MTV went on the air they chose Ampex.
Three companies made compatible TCR carts (RCA, 3M, and Calico Video) and Ampex carts were only made by them.
The ACR jammed more often than the RCA going into "test" mode which was really jam mode.
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