HAM RADIO STATION OH8LQ

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HAM Projects

  • LDMOS amplifier HMI
  • 3 kW LDMOS linear amplifier
  • GU84 autotune amp
  • 80 m Shorty Yagi
  • Winkeyer + SO2R box
  • Skimmer divider for FTdx101MP
  • 2x BLF188 HF-linear amps
  • 4 Square Phasing box
  • Galvanic isolator (kalvanoitu erotin;))
  • SONY WH-CH720N headset
  • BPF project
  • Relay box heater
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Skimmer divider for FTdx101MP

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 10 December 2022
Hits: 2583

SDR_FTdx101.jpg

 

 

 

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Winkeyer+SO2R

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 10 December 2022
Hits: 2546

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SO2R box with winkeyer and analog switch.

Schematic

80 m Shorty Yagi

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 10 December 2022
Hits: 2658

 

 

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80 m 2 el yagi and 40 m 2 over 2  

 

 Capasitance hat

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Element support ropes

 

 

 

 Improved construction

 

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 Tuning coils and match coil

So nice weather make antenna works. (small snowstorm)

 

Service at 40 m level.

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In the foregroud is a memory from Ice Age!

 

Esa OH8KTN climp up to tower

 

Base bearings

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 10 December 2022
Hits: 20615

 Various mast base bearings.

2013 10 23 14.17.09 

 

 

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Tapered roller bearing

 

 Old OH8QD thrust bearing repair parts

 

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Mast foundation and bearing. Attached to concrete

 

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 Assembled

 

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Ready mast sections

Rotators

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 10 December 2022
Hits: 20938

 

 

 

 

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Rotator with junk yard worm gear

 

 rotator6.jpg

 Worm gear and motor

  

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Wrom gear and axle to tower base 

 

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 More engineering and development

 

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Adjustment of two gears to each other

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 Axle inside of the tower

 

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Three phase motor control box

 

  1. Guy rings
  2. Make towers
  3. Build antennas
  4. Solar power plant

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VIDEO

  • Tower works at OH8LQ
  • Solder LDMOS
  • 42 m tower goes up
  • Ice droppin by drone PART I
  • Ice droppin by drone PART II
  • LDMOS amplifier GUI

Other projects

  • Solar power plant
  • 22 kW diesel generator project
  • Forest trailer
  • Harbor trailer

Presentations

  • LDMOS linear amplifiers (Finish)
  • SDR and CW Skimmer
  • OH Contests (kesäleiri 2022)