[BC] Re: Boring versus exciting transmitters

DHultsman5@aol.com DHultsman5
Mon Apr 9 06:38:03 CDT 2007


 
In a message dated 4/9/2007 12:39:24 AM Central Daylight Time,  
Xmitters at aol.com writes:

No more  pretty RF flames with this new fangled solid state stuff. The good 
old  days! SS driven tesla coil, anyone?



*********************
 
MAYBE  No RF flames,  but lots of smoke as combiners get  unbalalnced and 
burn.  Also 50 Volts DC  with a 250 Amp power supply  behind, is also very 
dangerous as it can be essentially a welder.  Have  seen two solid state 
transmitters with combiner problems, lots of stuff can burn  and make a mess.  One of 
them happened because  "engineer?"   jumpered overload circuits to keep station 
on air.
 
The old Continental 315, 5 kW.  with the 3 Phase Full Wave power  supply 
using six 575A mounted behind glass doors was an impressive transmitter  to watch 
at night turn on its internal flourscent lights,  turn on the  built-in 6 inch 
scope sent to monitor modulation,  turn out the building  lights turn up the 
monitor and the 575A's glow changes with the modulation  peaks.
 
I had one transmitter engineer, when our station played a little hard rock  
after 10 PM,  was know to lite up a "doobie" turn out the lites and lite  the 
transmitter and really groove with the music.
 
Dave



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