Johnson's TechWorld

@UCxBahEpst_OxQl4KDKocpFg - 4.8K subscribers

Posting amateur radio, space, astronomy and technology topics. I am an amateur radio operator with callsign: VU2JO. Interests in amateur radio include HF, VHF and UHF operations including Low Earth Orbit (LEO) satellite operations. Long back I used to homebrew (DIY) HF radios for personal use. Currently I am homebrewing HF, VHF and UHF antennas for use with my FT-710, IC-2730A and RTL-SDR Blog V4. Trying out various simple electronics hobby projects with integrated circuits, microcontrollers, Raspberry Pi, stepper motor etc. Interested in amateur radio and microcontroller software, including basics of programming. Returning to homebrewing radios once again. Initial plans are 100W HF linear amplifier and a QRP SSB 20/40m radio from a kit.

Home Videos Live Playlists

Spot the antenna from the waterfall challenge!

Spot the antenna from the waterfall challenge! Johnson's TechWorld

13 views - 20 hours ago

Where the canopy meets the airwaves!

Where the canopy meets the airwaves! Johnson's TechWorld

6 views - 1 day ago

Initial Power On of LMR SDR 1.1: Display Up!

Initial Power On of LMR SDR 1.1: Display Up! Johnson's TechWorld

28 views - 1 day ago

16 x 2 LCD Display for LMR SDR 1.1: Why four pins are not used?

16 x 2 LCD Display for LMR SDR 1.1: Why four pins are not used? Johnson's TechWorld

24 views - 2 days ago

Berg Strip, Berg Stick, Berg Connector for LMR SDR

Berg Strip, Berg Stick, Berg Connector for LMR SDR Johnson's TechWorld

12 views - 2 days ago

LMR SDR 1:1 Nearing Completion

LMR SDR 1:1 Nearing Completion Johnson's TechWorld

30 views - 3 days ago

സ്റ്റാൻഡിംഗ് വേവ് റേഷ്യോ (SWR) എന്താണ്?

സ്റ്റാൻഡിംഗ് വേവ് റേഷ്യോ (SWR) എന്താണ്? Johnson's TechWorld

21 views - 4 days ago

LMR SDR 1.1 Homebrewing Update

LMR SDR 1.1 Homebrewing Update Johnson's TechWorld

69 views - 5 days ago

See the Improvement in SWR after 'Servicing' Moxon Yagi for LEO Satellites!

See the Improvement in SWR after 'Servicing' Moxon Yagi for LEO Satellites! Johnson's TechWorld

45 views - 6 days ago

'Servicing' Moxon Yagi for LEO Satellites!

'Servicing' Moxon Yagi for LEO Satellites! Johnson's TechWorld

64 views - 1 week ago

Another 'Lonely' pass of ARISS

Another 'Lonely' pass of ARISS Johnson's TechWorld

31 views - 1 week ago

LMR SDR 1.1: Inductors which look like resistors!

LMR SDR 1.1: Inductors which look like resistors! Johnson's TechWorld

25 views - 1 week ago

Understanding LMR SDR 1.1 Circuit

Understanding LMR SDR 1.1 Circuit Johnson's TechWorld

77 views - 1 week ago

SMD Soldering for LMR SDR 1.1

SMD Soldering for LMR SDR 1.1 Johnson's TechWorld

84 views - 1 week ago

Comparing forward voltage (barrier potential) of diodes for N5ESE RF Probe

Comparing forward voltage (barrier potential) of diodes for N5ESE RF Probe Johnson's TechWorld

35 views - 1 week ago

ARTEMIS II Upadte from N2YO COM!

ARTEMIS II Upadte from N2YO COM! Johnson's TechWorld

56 views - 2 weeks ago

Having a look at the SMD Regulator ICs in LMR SDR 1.1

Having a look at the SMD Regulator ICs in LMR SDR 1.1 Johnson's TechWorld

26 views - 2 weeks ago

LMR SDR 1.1, Step 1.0!

LMR SDR 1.1, Step 1.0! Johnson's TechWorld

84 views - 2 weeks ago

LMR SDR 1.1 Kit is Here! Now for assembling!

LMR SDR 1.1 Kit is Here! Now for assembling! Johnson's TechWorld

104 views - 2 weeks ago

Calibration of Easy BITX using FT 710 as Frequency Counter!

Calibration of Easy BITX using FT 710 as Frequency Counter! Johnson's TechWorld

75 views - 2 weeks ago

Back on Satellite with a Twist!

Back on Satellite with a Twist! Johnson's TechWorld

127 views - 2 weeks ago

Bricked my Easy BITX and 'Recovered' as a 40m Single Band Version!

Bricked my Easy BITX and 'Recovered' as a 40m Single Band Version! Johnson's TechWorld

51 views - 2 weeks ago

Did you know that you can track ARTEMIS II from N2YO.COM?

Did you know that you can track ARTEMIS II from N2YO.COM? Johnson's TechWorld

395 views - 2 weeks ago

Why QRP? Johnson's TechWorld

34 views - 2 weeks ago

Testing Spectral Spread of SSB output from Easy BITX

Testing Spectral Spread of SSB output from Easy BITX Johnson's TechWorld

26 views - 2 weeks ago

Most Popular Videos!

Most Popular Videos! Johnson's TechWorld

87 views - 2 weeks ago

Finally Easy BITX is generating RF output!

Finally Easy BITX is generating RF output! Johnson's TechWorld

58 views - 2 weeks ago

Sudden drop in 40m signals after 8 am: Is a Geomagnetic Storm around?

Sudden drop in 40m signals after 8 am: Is a Geomagnetic Storm around? Johnson's TechWorld

40 views - 2 weeks ago

'Sniffing Out' the Fault in Easy BITX with N5ESE RF Probe!

'Sniffing Out' the Fault in Easy BITX with N5ESE RF Probe! Johnson's TechWorld

181 views - 3 weeks ago

Unboxing of LMR SDR 1.1 PCB

Unboxing of LMR SDR 1.1 PCB Johnson's TechWorld

33 views - 3 weeks ago

Venturing into homebrewing LMR SDR 1.1

Venturing into homebrewing LMR SDR 1.1 Johnson's TechWorld

24 views - 3 weeks ago

Having a close look at the integrated circuits in LMR SDR 1.1

Having a close look at the integrated circuits in LMR SDR 1.1 Johnson's TechWorld

39 views - 3 weeks ago

ഹാം റേഡിയോ പരീക്ഷാ തയ്യാറെടുപ്പ്: ആൾട്ടർനേറ്റിംഗ് കറന്റിന്റെ അടിസ്ഥാന തത്വങ്ങൾ

ഹാം റേഡിയോ പരീക്ഷാ തയ്യാറെടുപ്പ്: ആൾട്ടർനേറ്റിംഗ് കറന്റിന്റെ അടിസ്ഥാന തത്വങ്ങൾ Johnson's TechWorld

17 views - 3 weeks ago

Trying to avoid self oscillation of Easy BITX by reducing bias

Trying to avoid self oscillation of Easy BITX by reducing bias Johnson's TechWorld

100 views - 3 weeks ago

Trying LEO satellites after a long gap, but a snag!

Trying LEO satellites after a long gap, but a snag! Johnson's TechWorld

39 views - 3 weeks ago

Easy BITX has started giving output, but...

Easy BITX has started giving output, but... Johnson's TechWorld

405 views - 3 weeks ago

Setting Gate Bias in IRF510 of Easy BITX

Setting Gate Bias in IRF510 of Easy BITX Johnson's TechWorld

141 views - 3 weeks ago

Simple method to test output of QRP suggested by LB7UG

Simple method to test output of QRP suggested by LB7UG Johnson's TechWorld

118 views - 3 weeks ago

Checking voltages at IRF510 and total current in Easy BITX

Checking voltages at IRF510 and total current in Easy BITX Johnson's TechWorld

70 views - 3 weeks ago

Troubleshooting TX side of Easy BITX with my homebrew N5ESE Classic RF Probe

Troubleshooting TX side of Easy BITX with my homebrew N5ESE Classic RF Probe Johnson's TechWorld

157 views - 3 weeks ago

Improving sensitivity of my homebrew N5ESE RF probe

Improving sensitivity of my homebrew N5ESE RF probe Johnson's TechWorld

32 views - 3 weeks ago

HDMI Selector: First Step Towards LMR SDR!

HDMI Selector: First Step Towards LMR SDR! Johnson's TechWorld

62 views - 4 weeks ago

ATU-100 EXT Automatic Antenna Tuner

ATU-100 EXT Automatic Antenna Tuner Johnson's TechWorld

103 views - 4 weeks ago

Quick Homebrewing of a QRP Dummy Load for Testing N5ESE RF Probe

Quick Homebrewing of a QRP Dummy Load for Testing N5ESE RF Probe Johnson's TechWorld

42 views - 4 weeks ago

QRP Dummy Load for Testing Easy BITX TX!

QRP Dummy Load for Testing Easy BITX TX! Johnson's TechWorld

25 views - 1 month ago

Listening Airnet India on 7150 kHz with Easy BITX

Listening Airnet India on 7150 kHz with Easy BITX Johnson's TechWorld

108 views - 1 month ago

Excellent Signals of CW Net in Easy BITX!

Excellent Signals of CW Net in Easy BITX! Johnson's TechWorld

130 views - 1 month ago

Tuning TOKO bandpass filters in Easy BITX

Tuning TOKO bandpass filters in Easy BITX Johnson's TechWorld

70 views - 1 month ago

Easy BITX has started receiving amateur radio stations, though far from perfect!

Easy BITX has started receiving amateur radio stations, though far from perfect! Johnson's TechWorld

86 views - 1 month ago

Homebrewing N5ESE's Classic RF Probe

Homebrewing N5ESE's Classic RF Probe Johnson's TechWorld

105 views - 1 month ago

Easy BITX: Receiving from my FT-710

Easy BITX: Receiving from my FT-710 Johnson's TechWorld

106 views - 1 month ago

Easy BITX Has Started Receiving a Bit!

Easy BITX Has Started Receiving a Bit! Johnson's TechWorld

53 views - 1 month ago

Easy BITX Troubleshooting: Step 3 TX and RX Rails

Easy BITX Troubleshooting: Step 3 TX and RX Rails Johnson's TechWorld

35 views - 1 month ago

Comparison of noise in half wave dipole with full wave loop antenna

Comparison of noise in half wave dipole with full wave loop antenna Johnson's TechWorld

56 views - 1 month ago

Learning the Easy BITX circuit in detail for troubleshooting

Learning the Easy BITX circuit in detail for troubleshooting Johnson's TechWorld

121 views - 1 month ago

Easy BITX Troubleshooting: Step 2 BFO

Easy BITX Troubleshooting: Step 2 BFO Johnson's TechWorld

190 views - 1 month ago

Easy BITX Troubleshooting: Step 1 VFO

Easy BITX Troubleshooting: Step 1 VFO Johnson's TechWorld

94 views - 1 month ago

Where did I go wrong - local AM station on 20m and 40m bands?

Where did I go wrong - local AM station on 20m and 40m bands? Johnson's TechWorld

59 views - 1 month ago

Close look at the Raduino board in Easy BITX

Close look at the Raduino board in Easy BITX Johnson's TechWorld

92 views - 1 month ago

Checking output of audio amplifier of Easy BITX and more!

Checking output of audio amplifier of Easy BITX and more! Johnson's TechWorld

89 views - 1 month ago