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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BPF project

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 05 January 2025
Hits: 395

 

BPF Project

 

Parallel resonance circuit

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BPF testing with a thermal camera!

 

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More information later in the future...

 

 

Input attenuator

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 05 October 2024
Hits: 5187

 

 

 

Schema

BOM

Assembly

SONY WH-CH720N headset

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 17 November 2023
Hits: 1976

Heil BM10 boom Mic added

 

Galvanic isolator (kalvanoitu erotin;))

Details
Written by: Jari Ojala
Category: Uncategorised
Published: 17 October 2023
Hits: 2328

 

Galvanic stereo Isolator/

"galvanoitu erotin"

The galvanic isolator works up to approx. 100-4000 Hz. The transformer characteristics limit the bandwidth.

 

BOM/LAYOUT

 

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Parts

 

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Complete isolator at 3D printed case

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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)