[QuadList] RCA TRT 1 Color vs Non Color versions

[Chill315 at aol.com]

I did some more research.  The first TRTs had a tube type Proc  Amp.  It 
appears from the picture that it was a version of the TA-9 Stab  Amp.  This 
unit does not have any real color controls.  The only one  is the Chroma level 
control.  There were other things that I have  noticed.  Early machines did 
not have frame pulses.  They had field  pulses.  This was changed about 
1960 when the SMPTE standard was  adopted.  The early modulators had a 
different set of frequencies for  color.  Then Low Band color was standardized.  It 
has been interesting  to look at the instruction book.  The only thing that 
is missing is the  capstan servo. But all the rest is there.  I see the 
differences between  the A and B versions.  A lot of improvements.  Some are in  
the RF path but control, servo, power supplies, and MDAs appear to have 
been  improved.  
 
Chris Hill
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