[Premium-Rx] WJ DRO units?

[Geoff Greer -home]

Hi, 

  The DRO333A (full rack), DRO 309B (half rack)  will work with most receivers.  The LO offset is programmable via diode packs.  You can roll your own.  The service manual has enough details. The control lines (rear connector selectable by a switch on the rear panel)  tell the DRO which offset to use.  There are nixie versions of these units but they are much less common than the LED units. 

  The later versions (333A & 309B) are more desireable due ot the fact that they use IC prescalers for the 490 - 1000 mhz range as opposed to the discrete ring counters used in the earlier ones.  The late ones cover a wider range and are more stable.

Geoff  





  

 
  ----- Original Message ----- 
  From: Eugene Hertz 
  To: premium-rx at ml.skirrow.org 
  Sent: Tuesday, September 06, 2005 10:04 PM
  Subject: [Premium-Rx] WJ DRO units?


  Hi all. Been reading about the DRO units from WJ.  Does anyone know if a DRO-333A could be used with any reciever? OR does it use special control signals from WJ equipment only? I have a radio with 21.4 and 60mhz IF and was wondering if this could be used for digital read out from the LO output of the radio?

  Second question. If these WJ units are usable with other gear, anyone ever see a nixie version of these units? There were several. I would be interested in locating one that can handle 21.4 and 60, optionally 455khz and 3.955mhz if possible

  Anyone have any experience with these DRO units?

  Thanks



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