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<DIV><STRONG><FONT color=#0000ff>Replies inserted
below....</FONT></STRONG></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ted@quadvideotapegroup.com
href="mailto:ted@quadvideotapegroup.com">Ted Langdell</A> </DIV>
<DIV style="FONT: 10pt arial"><FONT size=3></FONT> </DIV>
<DIV>He also had something to do with pairing the VR-3000B with the Ampex
TBC-900 for a portable broadcast system:</DIV>
<DIV>
<DIV><A
href="http://www.chuckcolby.com/portabroadcast.html">http://www.chuckcolby.com/portabroadcast.html</A></DIV>
<DIV><BR></DIV>
<DIV>Anyone have a TBC-900?</DIV>
<DIV> </DIV>
<DIV><STRONG><FONT color=#0000ff>The article is a bit hard to read, but the
interesting thing about the TBC-900 is that as the article indicates, it's
much more than a TBC, including most of the signal system of the AVR-2.
The interface cable from the VR-3000B provides the 4 "raw" individual RF
channels to the "TBC" which then provides EQ, switching and demod. The
VR-3000B transport and servo function as usual.</FONT></STRONG></DIV>
<DIV> </DIV></DIV>
<DIV>What I don't remember seeing when I first visited (after it went into
bankruptcy a few years later) are the pair of </DIV>
<DIV>Type A machines in the background of this photo:</DIV>
<DIV><A
href="http://www.sbe124.org/Tours/Sacramento/KMUV/KMUV_tweaking_1974_400X600.jpg">http://www.sbe124.org/Tours/Sacramento/KMUV/KMUV_tweaking_1974_400X600.jpg</A></DIV>
<DIV><BR></DIV>
<DIV>I'd guess these were fully decked out VR-7900's? Wonder where they
went.</DIV>
<DIV><BR><STRONG><FONT color=#0000ff>Those are VPR-7950 or VPR-7950A
machines. The 7900 series was the first to go to the VPR prefix.
The 7900 is the "portable" version and the 7950 is the console version.
The difference between the 7900 and 7900A is the TBC. The 7900 was
equipped with a TBC-790 while the 7900A had the TBC-800. Without seeing
the lower doors open, you can't tell if these are 7950's or 7950A's. The
monitor bridges appear to have mono video monitors and a waveform
monitor. Fully configured, they would have had Tek 650 monitors and both
waveform and vector monitors. Those were really the only
options for the 7950 console machines while the 7900 had many
configurations.</FONT></STRONG></DIV>
<DIV><STRONG><FONT color=#0000ff></FONT></STRONG> </DIV>
<DIV><STRONG><FONT
color=#0000ff>Don</FONT></STRONG></DIV></BLOCKQUOTE></BODY></HTML>