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4270Re: Balanced Antenna Amplifiers

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  • mhatlau
    Nov 20, 2007
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      The reason, as I understand it, is that the U-310 has better linearity
      at high drain current than the J-310. This results in a higher IM2
      and IM3 figures in the resulting amplifier.

      --- In loopantennas@yahoogroups.com, Paul Birke <nonlinear@...> wrote:
      >
      > the noise is slightly better with the U310 but only slightly than
      the J310h at 450 MHz the delta is about 0.3 dB
      > nothing to write home about!
      > Chris may know other variables that could be better
      >
      > Also, I notice Dallas Lankford tends to use these U310 JFETs over
      the J310 JFETs and I don't know why!
      > p
      >
      > ----- Original Message ----
      > From: jr_dakota <SG2112@...>
      > To: loopantennas@yahoogroups.com
      > Sent: Tuesday, November 20, 2007 12:17:01 AM
      > Subject: [loopantennas] Re: Balanced Antenna Amplifiers
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      > How about a U-310, they are supposed to be better than a J-310 even
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      > though they use a similar die, I'm curious just how much better
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