VHF-and-above

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Last updated
3:02
Easy to make enclosure for your power amplifier, demonstrated in this 23/24 cm ATV power amplifier
By Chrix
  • 214 views
2:58
Homemade HB9CV antenna for the 2 mtr band: good performance for a very short boom
By Chrix
  • 2.3K views
9:54
Homemade 3 elements yagi for the 2 mtr. amateur band
By Chrix
  • 5.3K views
4:15
Measuring a SPF5189Z PCB and more possibilities with the NWT6000
By Chrix
  • 1.9K views
2:26
Twice a year smoke coming from your satellite dish?
By Chrix
  • 819 views
5:33
Log Periodic Array: the wideband directive antenna containing of many fed dipoles
By Chrix
  • 392 views
5:30
1: DIY experimental 6 meter (50 MHz) SSB transceiver. Could also be adapted for other bands
By Chrix
  • 5.1K views
10:28
2: DIY experimental 6 meter (50 MHz) SSB transceiver. Audio, frequency generator and mixer
By Chrix
  • 2.6K views
6:28
3: DIY experimental 6 meter (50 MHz) SSB transceiver bi-amp, crystal filter and mixer
By Chrix
  • 1.2K views
8:20
4: DIY experimental 6 meter (50 MHz) SSB transceiver, bandfilter and pre-amp
By Chrix
  • 1.3K views
8:48
5: DIY experimental 6 meter (50 MHz) SSB transceiver, transmitting circuits an filtering
By Chrix
  • 786 views
3:58
Home made 6 mtr transceiver in the 50 MHz IARU R1 SSB contest weekend 2022
By Chrix
  • 515 views
12:08
DIY 6 meter (50 MHz) VHF lineair power amplifier
By Chrix
  • 2.4K views
5:07
Vox (voice operated tranmitter) circuit for digital modes like FT8
By Chrix
  • 1.7K views
6:26
Extend your actual antenna with an easy 6 meterband (50 MHz) dipole
By Chrix
  • 219 views
10:21
Return loss bridge, some theory, how I made mine and some demonstration
By Chrix
  • 1.2K views
9:55
Cheap and easy 5 elements 70 cm yagi antenna building considerations
By Chrix
  • 3K views
3:18
Yagi performance test with help of a WebSDR
By Chrix
  • 246 views
6:17
DIY simple X-yagi for 70 cm satellite design and construction considerations
By Chrix
  • 1.2K views
4:31
Easy DIY 10 el yagi for 70 cm band, use of a balun, design and construction considerations
By Chrix
  • 1.4K views
0:52
X-yagi on an experimental satellite tracking system for Low Orbit satellites with my cross yagi
By Chrix
  • 273 views
8:50
1: Bow-tie broad band antenna, web calculators and antenna simulation/scaling by MMANA-GAL
By Chrix
  • 4.7K views
6:41
2: Bow-tie antenna performance, built two versions and compared with a dipole
By Chrix
  • 1K views
8:01
(How) does an RF choke work, is it needed and how to make an effective one
By Chrix
  • 6.9K views
3:00
Inverted-V antenna, 50 Ohm, example for the 6 mtr band
By Chrix
  • 435 views
7:33
70 cm to 10 mtr transverter by using a standard vintage module
By Chrix
  • 253 views
2:55
Small beacon as signal source for antenna or receiver tests
By Chrix
  • 191 views
9:11
Easy to adjust DIY Delta loop antenna for 50 MHz (6 meter band)
By Chrix
  • 14K views
11:04
Antenna radiation pattern: simple way of measurement and plotting
By Chrix
  • 1K views
4:31
A simple horizontally polarized quad antenna for 2 mtr that can easily be sticked out of the window
By Chrix
  • 456 views
8:11
(Un)reliable SWR Power meter, did 'calibration' help? Heathkit HM2102
By Chrix
  • 373 views
3:15
1: Amateur television repeater, start of PI6ATV (later PI6ATS) in Hilversum (1987 - 1990)
By Chrix
  • 162 views
11:09
Amateur television repeater PI6ATS latest current version (2013 - 2023)
By Chrix
  • 216 views
5:21
2: Amateur television repeater, from PI6ATV (Hilversum) to PI6ATS (Soest) (1990 - 2013)
By Chrix
  • 164 views
7:21
Alford Slot, horizontally polarized omnidirectional antenna for 23/24 cm and 13 cm band
By Chrix
  • 285 views
6:43
13 cm slot waveguide antenna, as used on various ATV repeaters and beacons
By Chrix
  • 174 views
10:08
6 cm slot antenna, assembling with the receiver and video of field tests via PI6ATS
By Chrix
  • 327 views
4:30
Halo antenna for the 2 meter band, used with PI6ATV, later PI6ATS
By Chrix
  • 341 views
4:17
Box antenna, horizontally polarized round radiating antenna for 70 cm
By Chrix
  • 154 views
3:51
DIY 23/24 cm FM Amateur Television transmitter
By Chrix
  • 907 views
15:07
DIY OCXO design, building and results (oven controlled crystal oscillator)
By Chrix
  • 733 views
3:18
Doppelquad or biquad explanation and examples
By Chrix
  • 1.6K views
4:05
Simple DIY 13 cm FM Amateur Television transmitter
By Chrix
  • 1.2K views
4:17
DIY 13 cm ATV transmitter frequency locked with steps and readout
By Chrix
  • 348 views
6:29
Pre-emphasis and de-emphasis in FM television, what is it? Explained in a simple way.
By Chrix
  • 651 views
5:31
DIY 9 cm FM Amateur Television transmitter
By Chrix
  • 214 views
7:49
3: Bow tie antenna for reception of WCBS 608 MHz
By Chrix
  • 262 views
6:10
DIY charger 'stand' for a handheld transceiver
By Chrix
  • 214 views
4:27
Construction ideas for an easy 70 cm band antenna (yagi) to stick out of the window
By Chrix
  • 196 views
10:15
DIY Lightweight Moxon wire antenna for the 2 meter band to stick out of the window
By Chrix
  • 728 views
5:10
Cheap small frequency counter 50 MHz - 2.4 GHz
By Chrix
  • 483 views
2:37
DIY 6 cm, 5.8 GHz Amateur television video transmitter without plumbing
By Chrix
  • 606 views
8:35
DIY easy 6 cm Amateur Television (video) transceiver
By Chrix
  • 316 views
6:47
DIY coaxial relay instead of buying a very expensive one
By Chrix
  • 1.1K views
7:08
DIY simple control circuits for a coaxial relay for HF, VHF or UHF
By Chrix
  • 812 views
4:50
Antennas for the 6 cm Amateur Television station
By Chrix
  • 340 views
5:47
Measure yourself the performance of your antenna, how about the DIY 5 elements Yagi
By Chrix
  • 226 views
3:38
Performance and radiation pattern of the 10 elements Yagi for the 70 cm band
By Chrix
  • 94 views
2:16
Moxon antenna performance measured in the two meter band
By Chrix
  • 239 views
3:54
Cheap video cameras for analogue Amateur Television (ATV)
By Chrix
  • 1.3K views
4:32
1: What distance could you bridge with a small ATV or drone transmitter in the 6 cm band?
By Chrix
  • 401 views
4:24
2: At what distance will the transmitted signal be blocked by earth or other obstruction?
By Chrix
  • 235 views
3:55
Repair of a HP Thermistor Mount 478A in case of expected damage caused by too high power
By Chrix
  • 278 views
5:42
3: Refraction will extend the distance of the VHF, UHF or SHF signal much further then the horizon
By Chrix
  • 179 views
8:54
DIY Good functioning GPS antenna
By Chrix
  • 3.1K views
5:34
4: Obstructions could help to increase the distance in VHF, UHF, SHF: reflection and diffraction!
By Chrix
  • 96 views
5:35
How I built my 24 GHz FM ATV transceiver
By Chrix
  • 496 views
6:25
DIY how to expand a spectrum analyzer with 24 GHz
By Chrix
  • 214 views
13:39
How to get predictions and nice plots for your own experiments: Radio Mobile tutorial
By Chrix
  • 89 views
7:44
What to do with a defective battery pack of your handheld
By Chrix
  • 129 views
6:10
Things that could go wrong with a simple Bias Tee circuit
By Chrix
  • 1.4K views
4:54
Cheap 10 GHz addition for your (SDR) receiver or spectrum analyzer
By Chrix
  • 242 views
5:23
Alternative replacement for defective battery of a handheld
By Chrix
  • 577 views
3:40
Why does the sketch of the DIY GPSDO project stop?
By Chrix
  • 358 views
3:42
How bad is it if the dipole is not in the same plane as the other elements of the Yagi?
By Chrix
  • 125 views
5:39
How to measure sensitivity of ATV FPV receivers in the 6 cm band
By Chrix
  • 187 views
8:45
Frequency correction of a PLL FM demodulator in an Amateur Television FPV receiver
By Chrix
  • 183 views
11:39
DIY Horn Antenna as dishfeed for 24 GHz
By Chrix
  • 450 views
4:57
Self resonance of RF chokes, bad or helpful?
By Chrix
  • 240 views
4:32
5: VHF UHF SHF propagation up to 800 km, Troposcatter!
By Chrix
  • 152 views
11:04
Simple DIY HF or VHF antenna to hang in a tree or stick out of the window in a PVC tube
By Chrix
  • 8.9K views
7:49
How to build a horn antenna as a reference with known gain and some construction ideas
By Chrix
  • 918 views
5:59
Simple way to get gain from your wire or rod antenna by adding a simple wire
By Chrix
  • 378 views
7:31
Velocity factor for antenna materials measured in the 70 cm band
By Chrix
  • 393 views
6:59
How to increase the distance between PMR446 stations while the antenna is not detachable?
By Chrix
  • 533 views
8:11
DIY old school FM Amateur Television (ATV) receiver for the 23/24 cm band still a challenge?
By Chrix
  • 411 views
5:47
DIY simplest FM ATV transmitter oscillator for 23/24 or 13 cm band
By Chrix
  • 4.3K views
10:30
DIY FM Amateur Television (ATV) or analogue satellite receiver with cheap tuner SAT5601 and SL1452
By Chrix
  • 2.5K views
10:06
Most radio amateurs started with this simple FM transmitter for their own pirate radio station
By Chrix
  • 20K views
7:39
What about the modulator for the simple one transistor FM broadcast transmitter?
By Chrix
  • 386 views
13:55
Sudden sensitivity decrease of my receiver, measurements, diagnostics and repair
By Chrix
  • 668 views
8:43
Goedkoper een portofoon als radio in het noodpakket voor gebruik bij noodsituaties?
By Chrix
  • 11K views
6:18
Why do different PMR handhelds not hear each other? What to do about it?
By Chrix
  • 176 views
4:07
Receive and decode images from space yourself!
By Chrix
  • 478 views
4:10
(When) does it make sense to point the antenna upwards and how many degrees?
By Chrix
  • 160 views
5:27
DIY squelch circuit to get some silence in your shack (or in the field)!
By Chrix
  • 2.9K views
7:13
A cheap pointcontact diode or PIN diode as HF switch? What's the differents? Measurements!
By Chrix
  • 546 views
9:01
DIY FM TV satellite reception in the 11 GHz band in the early days
By Chrix
  • 7.5K views