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Re: Re: Drake 2880 power



As long as people are thinking about the bias Tee for power, perhaps
something could be added to that to provide protection from
transmitting into the converter: perhaps a sacraficial(sp?) cheap
unity gain, low-enough noise, amp?

73, doug

   From: Yoshihiro Imaishi <imaishi@aa.mbn.or.jp>
   Date: Tue, 30 Jan 2001 10:57:26 +0900
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   Hello This is Yoshi.

   At 2001/01/30 03:40:04 John P. Toscano wrote:
   >                    DC Blocking Capacitor
   >                            ||
   >                            \/
   > 
   > IF Radio ====[coax]========)(========*=========[coax]==== Drake 2880
   >                                      |
   >                            C1        (
   >                                       )  <== RF Blocking Inductor
   >                                      (       (Sorry, couldn't figure
   >                                   L1  )      a better way to draw it)
   >                                      (
   >                                      |
   >                                     )|(  C2 - Feedthrough Capacitor
   >                                      |
   >                                +VDC Power Feed
   > 
   <snip>
   > Sorry, I have no idea on the appropriate values of the components.

     This is in my case.

   http://plaza16.mbn.or.jp/~palau/images/mode-s-conv01.jpg
     ( C1:0.01uF Ceramic, L1:0.3mm-Wire 4mm-Dim 15-turn. No C2. )

     After this, I covered all of this circuit with alminum-Foil
   for shield.

   73 de Yoshi JF6BCC/KH2GR

   Yoshihiro Imaishi JF6BCC/KH2GR
   mailto:jf6bcc@jarl.com
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