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<DIV>To pick up on the two previous emails.</DIV>
<DIV> </DIV>
<DIV>I just realized that the model numbers of RCA mics started with the
numbers, like in 77DX and 44BX while cameras started with the letters like
TK-41.<BR>
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<DIV>
<DIV><BR class=Apple-interchange-newline>Best,</DIV>
<DIV>Park</DIV>
<DIV> </DIV><FONT size=2 face=Arial>
<DIV><FONT size=2>Park,</FONT><BR>I think the distinction with RCA model numbers
is older gear vs newer -- <FONT size=2>Pre mid 1950s vs </FONT>post mid 1950s.
Earlier gear such as the iconic 76 consolette, or the 50D or 5D transmitters,
the 86 limiter, had numbers with postscript letters. For example my RCA
consolette is a 76B5. So most of the famous RCA microphones fall into this
group, the 44A<FONT size=2>,</FONT> B, BX, the 77A, B, C, D, DX, the 72 series,
etc. after the mid fifties, they went to a system with letter<FONT
size=2>s</FONT> followed by a number, BC for consoles, B<FONT size=2>T</FONT>A
for AM transmitters, <FONT size=2>BTF for FM transmitters, </FONT>TT for TV
transmitters, SK for microphones, <FONT size=2>BA for broadcast audio devices
such as limiters, monitor amps, </FONT>etc. It's confusing because they didn't
change the model number on existing products, but continued to list them with
their original numbers side by side with the new lines using the new number
scheme.</DIV>
<DIV>Bob Bruner</DIV>
<DIV>WTTW retired <BR></DIV>
<DIV> </DIV>
<DIV>It has always been a bit of a mystery to me how RCA decided on the model
numbers. </DIV>
<DIV> </DIV>
<DIV>T probably stood for Television. K for Camera. Possibly the
German version of the word? R for Recorder. S for switchers. G for
generators. M for monitors. P for projectors and film items.
</DIV>
<DIV> </DIV>
<DIV>So why some other names. WP for power? W something for other
items. TO for some scopes and WR for others. </DIV>
<DIV> </DIV>
<DIV>Many items just had an MI number which was the master index
number. </DIV>
<DIV> </DIV>
<DIV>So any help from a former RCA person that can explain the
nomenclature?</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV></FONT></DIV></SPAN></DIV></SPAN></DIV></SPAN></SPAN></DIV></SPAN></DIV></SPAN></DIV></SPAN></DIV></SPAN></DIV></DIV></DIV></FONT></BODY></HTML>