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Re: [softrock40] Re: New version of my Antenna Tuner project

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  • Sid Boyce
    Both vacuum capacitors and vacuum relays are very expensive and luckily I got them while they were going cheap as ex-equipment items. In my higher powered PA s
    Message 1 of 10 , Mar 27, 2013
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      Both vacuum capacitors and vacuum relays are very expensive and luckily I got them while they were going cheap as ex-equipment items.

      In my higher powered PA's AN762 and EB104 I use vacuum relays.
      73 ... Sid.

      On 27/03/13 12:13, pu2clr wrote:
       

      Yes Sid,
      It is really expensive.
      I found some vaccum capacitors (5-100pF) on eBay costing $70 plus $40 for shipping to Brazil.

      73. PU2CLR.
      Ricardo.

      --- In softrock40@yahoogroups.com, Sid Boyce <sboyce@...> wrote:
      >
      > OK Ricardo,
      > Quite a few years ago vacuum capacitors were a reasonable price at ham
      > radio rallies so I bought 2.
      >
      > The latest 10KV one I got about 3 years ago from
      > http://www.mgs4u.com/RF-Microwave/vacuum-variable-capacitors-1000.htm
      >
      > The one that smashed was Jennings UCSL-1000-3D345 which now costs
      > $239.00 and I got mine at a rally for ~£20.00 UK.
      > 73 ... Sid.
      >
      >
      > On 26/03/13 21:42, pu2clr wrote:
      > >
      > > Hi Sid.
      > > Yes, Undoubtedly a Vacuum capacitor is the best choice for this kind
      > > of Antenna.
      > >
      > > Keep me posted about your project.
      > >
      > > 73.
      > >
      > > --- In softrock40@yahoogroups.com
      > > <mailto:softrock40%40yahoogroups.com>, Sid Boyce <sboyce@> wrote:
      > > >
      > > > Thanks Ricardo,
      > > > I have got all the bits together but have not yet got around to
      > > building
      > > > the controller.
      > > >
      > > > When the weather improves I'll put my 13' diameter loop up again, this
      > > > time hopefully to withstand 100+ MPH winds.
      > > > I am thinking of placing the large and heavy vacuum capacitor at the
      > > > bottom of the loop to lighten the wind loading.
      > > > 73 ... Sid.
      > > >
      > > > On 20/03/13 20:57, pu2clr wrote:
      > > > >
      > > > > Hello everybody,
      > > > >
      > > > > I would like to share the new version of my Antenna Tuner project.
      > > > >
      > > > > Who enjoy QRP and liked the video "Magnetic Loop Antenna
      > > controlled by
      > > > > Arduino
      > > > > and infrared", will appreciate my last one.
      > > > >
      > > > > Now I inserted an encoder to increase the possibilities to handle the
      > > > > antenna
      > > > > tuner. I also changed the stepper motor by a servo.
      > > > >
      > > > > To watch my video, access this link: http://youtu.be/zD-wKD19_8U
      > > > > If you do not feel comfortable in accessing the link above for
      > > > > security reason,
      > > > > please try look for "Arduino, IR and Encoder controlling Magnetic
      > > Loop
      > > > > Antenna
      > > > > Tuner" on Youtube page.
      > > > >
      > > > > Little by little I am improving the documentation (schematic, source
      > > > > code and
      > > > > text) to share it to everybody.
      > > > >
      > > > > 73.
      > > > > PU2CLR,
      > > > > Ricardo.
      > > > >
      > > > >
      > > >
      > > >



      -- 
      Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
      Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
      Senior Staff Specialist, Cricket Coach
      Microsoft Windows Free Zone - Linux used for all Computing Tasks
      
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