“Nestled deep in the Chequamegon-Nicolet National Forest in Northwest Wisconsin is the small town of Clam Lake. Clam Lake is best known for the excellent hunting and fishing in the area, and of course the herd of elk that roam the countryside. But the elk population is more of a side effect of what I’m going to talk about today. At one time this area was home to a military base and in fact, world war three could have been signaled from its location. I’m talking about Project ELF, the Navy’s program to send messages to submarines deep under water. Let’s explore Project ELF, a cold war relic that still has an impact today.”
Antenna
How I designed the Nebula eXtreme Multiband 18m DX Commander Antenna
eXtreme Multiband 18m DX Read more
Cushcraft A4S Yagi Beam Triband 4 ele. 10,15,20M
Cushcraft A4S A4S Four Element Beam – 10, 15 & 20 Meters A4S is the true, high performance tribander. Precisely tuned high-power traps, c… Read more
Center Loading the Wolf River Silver Bullet 1000
“Wold River Coils has a new accessory for Silver Bullet 500 & 1000 coils called the UAFI or You Asked For It kit. The UAFI is a pair of exte… Read more
Folding Hexbeam
The design The folding Hexbeam is a 2-element directive antenna for five amateur bands (20/17/15/12/10m band, 6m band optional). It cons… Read more
Kojinsha – KA1-DP – 7-50MHz – HF Antenna
Model KA1-DP Gain/Size Frequency Range 7-50 Element 1 Number of Elements for Each Band 7-50MHz DP Longest Element（m） 10.4 Power Rating 7/10MHz 1.2kW S… Read more
BALCONY ANTENNA MOUNT – MFJ-1907
MFJ Heavy Duty Balcony Antenna Mount Use this MFJ-1907 to safely and securely mount an antenna to your balcony in your apartment or condo. Go portable… Read more
The Mighty Rhombic, the King of Antennas
“There was a time, back in the 1930s and 1940s, when the rhombic antenna was the king. A remarkable antenna that had phenomenal directivity and… Read more
Review
Stellar x2 vs RE20 vs RE27ND Microphone Review
“We compare the Stellar x2 vs RE27 vs RE20 from Electrovoice. I was amazed with this Microphone and as soon as the new Mixer arrives, we’l… Read more
Icom IC-705 with the mAT-705 Portable Tuner
“Today I operate the Icom IC-705 at my hunting lease as a portable radio with an End Fed Random Wire antenna from Nelson Antennas, and the mAT-7… Read more
From the Array Solutions Lab: OM Power 2500A amplifier Selecting Antennas and Filters
Showing how the OM-Power Automatic amplifiers like the OM-2500A, OM-4000A, can control the selection of up to ten antennas driving an antenna switch a… Read more
My Favorite Amateur Radio & Video Gear Of 2020
Wrapping up 2020 with a recap on my favorite things! This list includes both gear for ham radio and video creation. I hope you enjoy it! Read more
Wireless, Off-Grid, No-License Communication For $27.99 (LoRa Meshtastic)
The LoRa Meshtastic T-BEAM device are small battery powered devices that will mesh with other T-BEAM and send messages and other data from your phones… Read more
Equipment
21st Century Transceiver Design: The K4 High Performance Direct Sampling SDR
The Elecraft K4 High Performance Direct Sampling SDR Read more
XR44COPA – Copa América 2015
XR44COPA – Copa América 2015 Special Call celebrationof Copa América Chile 2015 Team Chilean Pacific Dx Group worked : XR44COPA 2015 CE3MMT -CE3… Read more
Expert Electronics SunSDR2-MB1 Transceiver
The DUC/DDC transceiver SunSDR-MB1 – this is a new generation of amateur radio. Transceiver combines a classic design, accumulated many d… Read more
Radio Shield RS-UV3
The HobbyPCB RS-UV3 radio module is a 144/220/450 MHz FM transceiver board. The RS-UV3 is a low cost transceiver solution for Packet Radio, repeaters,… Read more
The Yaesu FT-891 | Specifications
Yaesu FT-891 HF/50MHz 100W All Mode Transceiver – FT-891 · Rugged construction in an ultra-compact body 6.1” x 2.0” x 8.6” (152 x 52 x… Read more
Ailunce HS1 HF SDR HAM Transceiver
Ailunce HS1 Description: Spectrum Dynamic Waterfall Display Multiple Working Modes：Receive Mode, Transmit Mode, TUNE Mode, VFO Mode, SPLIT Mode DSP Di… Read more
Italab Rfbroadcast – HERCULES 1500 – HF RF POWER AMPLIFIER (1.8 – 30 MHz )
Italab HERCULES 1500 – HF RF POWER AMPLIFIER (1.8 – 30 MHz ) Extremely robust HF RF POWER amplifier, the RF section is equipped with 2 DUA… Read more
The post The history of communicating with submarines underwater appeared first on QRZ NOW – Ham Radio News.