[Premium-Rx] H-mixer

[Baruch Zilbershatz]

The fets are biased at 30-45 mA per fets.No source resistors.I do not have the needed equipment to make the Ip and spectral purity of the output but I could switch between the two mixers and the H 4*cp651 was supirior to the original collins configuration.I built it 4 years ago and using it today as my main op. radio.
I got good results using U 310 power fets too.
Best wishes 73's
 Baruch Zilbershatz 4z4-RB
       4z4rb at bezeqint.net

  ----- Original Message ----- 
  From: Carcia, Francis A HS 
  To: premium-rx at ml.skirrow.org 
  Sent: Thursday, September 22, 2005 2:48 PM
  Subject: RE: [Premium-Rx] H-mixer


  Hi Baruch,
  I wonder if you put any bias on the gates and did you use any source resistors?   fc



------------------------------------------------------------------------------
  From: Baruch Zilbershatz [mailto:4z4rb at bezeqint.net] 
  Sent: Thursday, September 22, 2005 3:49 AM
  To: premium-rx at ml.skirrow.org
  Subject: [Premium-Rx] H-mixer


  Hi all!
  I managed to build a mixer using 4 crysalonics CP651.
  The mixer is working in my Rockwell-Collins 718U-4 radio in place of the 3x2n4417 collins house number fets.
  It took a while to get it all o work but the results are wee worth the effort .
  I got my fets  on eBay for 4.95 per 4 !
  Best wishes 73's
   Baruch Zilbershatz 4z4-RB
         4z4rb at bezeqint.net



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