[Heathkit] Dx100 and 100B difference

[Glen Zook]

The DX-100B came with the continuously variable antenna loading whereas the DX-100 had fixed capacitors switched with a much smaller variable capacitor.  Heath came out with a modification kit for the original DX-100 to change to the completely variable loading.  DX-100 transmitters such modified were sometimes called a DX-100A.


The DX-100B has only 1-crystal position and that is activated by a slide switch accessible through the door in the top of the cabinet.  The DX-100 had 4-crystal positions that were switched from the front panel.


There were 3-capacitor values changed (minor differences) in the 10-meter section of the 5763 driver stage.  This was done to increase drive on the 10-meter band.  There was an article in QST giving details on changing those capacitors in the original DX-100 transmitters.


Otherwise, electrically the same.

 Glen, K9STH Website: http://k9sth.net

      From: "w5sum at comcast.net" <w5sum at comcast.net>
 To: heathkit at mailman.qth.net 
 Sent: Saturday, September 24, 2016 2:01 PM
 Subject: [Heathkit] Dx100 and 100B difference
   
Can anyone tell me what the difference was between the DX100 and the DX100B besides the cabinet?

Thanks