[BC] Re: [BC Differences MW Xmtrs

[dhultsman5@aol.com]

Bill:
 
I am not an expert on "MW" transmitters
 
The MW-50,  50 kW. rig  uses four tubes as I recall  2 each 4CX35,000A, and 2 each 4CX1500A tubes.  The transmitter uses a "Pulse Duration Modulator" tm . The first units had a fifth tube for a damper diode.
 
The MW-5 and MW-10 are similiar transmitters in size and technology, employing, two tubes in each,  the MW-5 has a 3CX2500 and a 4CX3000 PWM  modulator.   I don't recal the MW-10's tube types I am certain someone will chime in here on the old party-line.
 
The MW-1  was a 1 kW. Solid State AM transmitter using "PSM" tm,  Progressive Series Modulation and had no vauum tubes.
 
 
Dave Hultsman

 
 
-----Original Message-----
From: boydsirboyd at aol.com
To: broadcast at radiolists.net
Sent: Thu, 22 Feb 2007 6:47 PM
Subject: Re: [BC] power output formula


 thanks for the answer and the formula, i was the one having a time with a MW50 
harris transmitter here in south carolina. but it's up and running just fine. 
now to fix the kintronics switching unit.
 one other thing, since i got this one up and running so good, what are the main 
differences between the MW50,,,MW10,, MW5,, and the MW1 harris rigs? except the 
output power. i know the cabinets of the MW10 and the MW5 are half the size of 
this baby, but the MW1 is one cabinet correct?
 
 bill
    
 -----Original Message-----
 From: dhultsman5 at aol.com
 To: broadcast at radiolists.net
 Sent: Thu, 22 Feb 2007 7:10 PM
 Subject: Re: [BC] power output formula
 
  P=I squared R,   Where P= Power,  I =  Common Point Current in Amps,   R=  RF 
resistance with zero reactance at frequency. 
Also rember you have a loss factor for DA Common Points.  The method of 
calculating this has been changed so you need to check the R & R.  for 1-5 kW.  
and 10-thru 50 kW.

 
Dave Hultsman
Continental Electronics .
Birmingham, AL
Tel Toll Free (888) 822-1078
Fax (205) 822-6441
 
 
-----Original Message-----
From: boydsirboyd at aol.com
To: broadcast at radiolists.net
Sent: Thu, 22 Feb 2007 6:00 PM
Subject: [BC] power output formula


  ok i need the basic formula to do a power output conformation.
 
 common point meter is 32 amps and the load is 50 ohms to the phaser cabinet.
 
 bill 
  
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