There are a number of ways to add dB gain to your transmitted signal. But how much difference does 3dB or 6dB make? Is it worth the effort! Peter G3OJV demonstrates using calibrated audio tracks. In this video I deliberately started with a difficult to hear signal that represented 0dB gain and might be ne a typical 100W signal in competition with heavy noise.
Antenna
Vertical Antenna 8 bands trapped (10-12-15-17-20-30-40-80m) with wire radials 1/4 lambda for each one band.
10-40m Full bands coverage. 80m about 120Kc/s RF chocke for electrostatic protection. 2 KW pep SO239 Technical specifications: Height: 11.3 m approxim… Read more
The 2 Meter Coffee Can Antenna
The 2 meter coffee can antenna is easy to make and you’ll have loads of fun making contacts with it! The coffee can antenna is actually a… Read more
Arduino Mega2560 based Antenna Rotator Controller
by Vinod Es “Well after a long time I am back with a new project ! This is an attempt to build an Antenna rotator controller using Arduino Mega… Read more
Stretching Antenna Bandwidths
Often on the HF bands, we find that the quoted antenna frequency bandwidth is not wide enough to cover the whole band. This can be a particular proble… Read more
6-80 Meter Antenna EzMilitary in a 16″ bag with Match & Mount
Alpha Ez-Military Antenna, a complete 1KW PEP system for Military, Emergency Services, or restricted use environments. The 1KW Ez-Military system is a… Read more
Review
Spy Radio & Indoor Antennas – If they can do it, so can you!
Spy Radio & Indoor Antennas – If they can do it, so can you! Read more
Airspy Spyverter – HF Upconverter Features / Demo / SDR
https://www.youtube.com/watch?v=6AvEpIsQHU8 Read more
RFinder HCP1 Hotspot – Hot Chili Peppa! Quad Band Pi-star Hotspot
https://www.youtube.com/watch?v=pMzM1AUHT0w Read more
Heil Sound of Bob Heil explaining the Parametric Audio Systems (PRAS)
The Heil Sound Parametric Receive Audio System (PRAS) is a state-of-the-art audio system that enhances the internal audio systems of amateur radio, sh… Read more
The new Malahit-DSP: A portable all-in-one wideband SDR receiver
Technical Specifications 1 MHz to 1000 MHz. Bandwidth 160 kHz. Modulation types AM, WFM, NFM, LSB, USB. Powered by one Li-ion cell. Consumption up to… Read more
First contact with this new Chinese made FX9B QRP
“My first 20 metre contact on the FX9B with a LZ Station. A little thumbling around in the beginning with some settings . I also had to increase… Read more
A review of the Elad FDM-S2 software defined receiver
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Equipment
Introducing the NEW BCS-200 Speaker Mic by BridgeCom Systems:
BridgeCom Systems, Inc is pleased to announce the availability of the BCS-200 Speaker Mic for the amateur and commercial radio markets. Introducing th… Read more
RF-KIT RF2K-S Amplifier – Legal Limit Solid State PA
General Features: Output Power 1.8 – 30 MHz 2K+, 6m 1K+ Device: 2x BLF189XR Auto Band Selection ICOM®; YAESU® Band data Interface CAT Connectivity LAN… Read more
Introducing the BP-307 High Capacity Li-Ion battery pack
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NanoVNA V2 Plus4
4GHz second generation NanoVNA vector network analyzer, our own design. The V2 Plus4 is the latest hardware version with 4″ display, aluminum ca… Read more
HARDROCK-50 ATU Kit
HARDROCK-50 ATU Kit Additional functions: 60M band coverage. The ATU has a 60M lowpass filter which provides sufficient attenuation of harmonic… Read more
The One Person Antenna Raiser by KL7JR
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MFJ-939I PLUG,PLAY,200W AUTOTUNER, HF – Plug & Play Auto Tuner
Plug & Play Auto Tuner Plug & Play! You won’t even know it’s there . . . MFJ-939I/K/Y automatically tunes your antenna as you tune your radio…. Read more
RFinder B1 HT Radio, Android DMR and FM
RFinder B1 HT Radio, Android DMR and FM This is the device that you have been waiting for! The RFinder B1 is now available for pre-order. Imagine a d… Read more
The post Adding dB Gain to your Transmit Signal. Howe much difference? appeared first on QRZ NOW – Ham Radio News.