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Re: 20 Meter Bandpass filter capacitor placement of c32b and c33b

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  • Hank
    Bruce, Thanks, that is an excellent idea to check w/o the BPF in place. I should have thought of that myself. Will verify the top and bottom cap are the same
    Message 1 of 6 , Feb 25, 2013
      Bruce,

      Thanks, that is an excellent idea to check w/o the BPF in place. I should have thought of that myself.

      Will verify the top and bottom cap are the same value as well.

      73,

      Hank - wz3hmt

      --- In GenesisRadio@yahoogroups.com, "Bruce KF1Z" <kf1z@...> wrote:
      >
      > Yes, I assume you would see a difference.
      >
      >
      > Just be sure what you have before removing anything!
      >
      > If you look at the pictures.... you'll see there are 4 caps right next to the relay for each band.
      > The "top" and the "bottom" caps, must be the same value.
      > ( these are the input and output caps for the filter.)
      >
      > But easy way is to go by the pictures, and component designator.
      >
      >
      > You can check by removing the 3 wire cable K4.
      > This bypasses the BP filter section.
      >
      > You should not see more than 1 or 2 db difference in signal strength
      > with it connected, compared to disconnected.
      >
      > Bruce
      >
      >
      >
      >
      >
      > From: Hank
      > Sent: Monday, February 25, 2013 12:24 PM
      > To: GenesisRadio@yahoogroups.com
      > Subject: [GenesisRadio] Re: 20 Meter Bandpass filter capacitor placement of c32b and c33b
      >
      >
      > Bruce,
      >
      > I caught this post and happened to have my G59 opened up to replace the power and transmit LED's. I checked mine first G59 which was a Mark II board and noticed that I had installed C33/C32 opposite of the picture. 20M works for me but do you think I would notice an improvement if I switched the CAP's to what they should be.
      >
      > It's pretty tight in there with all the caps installed. I am thinking to order replacement caps first before I try if you thought it would be worth the effort. You know if it work's don't fix it.
      >
      > 73,
      >
      > Hank - wz3hmt
      >
      > --- In mailto:GenesisRadio%40yahoogroups.com, "Bruce KF1Z" wrote:
      > >
      > > Go by the picture on the website.
      > >
      > > Ignore the silkscreen in this case.
      > >
      > >
      > > The tag was changed on the picture, instead of changing the component list value
      > > ( I guess it was easier at the time?)
      > >
      > >
      > > The picture tags used with the component designator list , is correct.
      > >
      > > Bruce
      > > kf1z
      > >
      > >
      > >
      > > From: the_13th_saint_at_your_bidding
      > > Sent: Saturday, February 23, 2013 6:05 PM
      > > To: mailto:GenesisRadio%40yahoogroups.com
      > > Subject: [GenesisRadio] 20 Meter Bandpass filter capacitor placement of c32b and c33b
      > >
      > >
      > > Hello all,
      > >
      > > Can I get confirmation of which is correct placement for the 20 Meter bandpass capacitors for the mark 3 G59? the silkscreen and the picture for c33b above c32b are conflicting.
      > >
      > > phase 7, http://www.genesisradio.com.au/G59/phase7.html
      > > -> http://genesisradio.com.au/G59/pictures/g59_134.jpg
      > >
      > > This silkscreen says c32b is above c33b, but the picture shows c33b above c32b.
      > >
      > > BOM says:
      > > c32b is 220pF
      > > c33b is 4.7pF
      > >
      > > Thank you!
      > >
      > > Daniel
      > > KE6PQV
      > >
      >
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