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Antennas : K9AY- K9AY 160m 80m receiving loop antenna
- A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN
[ Hits: 987 | Votes: 1 | Rating: 7 ]
- Z-Match Antenna Tuner project
- This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch.
[ Hits: 1173 | Votes: 0 | Rating: 0 ]
- MikroTik
- MikroTik is a Latvian company which founded in 1995 to develop routers and wireless ISP systems. Wifi Routers, router boards, switches, interfaces and enclosures.
[ Hits: 342 | Votes: 1 | Rating: 10 ]
- Transmit Key Function fir TR-7
- Useful Function for the Drake TR-7(A) \"Store\" Switch
Add A Transmit Key Function
[ Hits: 235 | Votes: 0 | Rating: 0 ]
- Computer Controllable Stepper Switch
- A stepper switch controller made with arduino by N3OX
[ Hits: 526 | Votes: 0 | Rating: 0 ]
- Arduino automated antenna switch
- This Arduino project decode ICOM CAT frequency information and switch antennas according to preset values. RX and TX antennas can even be different, a project by ON7EQ
[ Hits: 3009 | Votes: 4 | Rating: 9.75 ]
- RF Coaxial Switch
- An interesting rf coaxial switch project capable of handling 800-1500 W. This is a cheap home made RF coaxial switch in use by PA0FRI
[ Hits: 422 | Votes: 2 | Rating: 4.5 ]
- Using Bipolar Transistors As Switches
- While transistors have many uses, one of the less known uses by amateurs is the ability for bipolar transistors to turn things on and off
[ Hits: 329 | Votes: 0 | Rating: 0 ]
- Headset Adapter and Footswitch
- This project fills the need for a 706 mic/headphone/PTT adapter.
[ Hits: 441 | Votes: 1 | Rating: 1 ]
- Headset Adapter and Footswitch
- A push-button and mic-headphone jacks for your radio by KV5R
[ Hits: 949 | Votes: 0 | Rating: 0 ]
- The Egg A Plumbers PTT Switch
- A PTT switch from Home Depot parts
[ Hits: 484 | Votes: 0 | Rating: 0 ]
- Homebrew Dow-Key
- Homemade an external T/R switch for your vintage RTX by KB8OJH
[ Hits: 353 | Votes: 0 | Rating: 0 ]
- AVR Butterfly Keyer
- The Atmel AVR Butterfly is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.
[ Hits: 682 | Votes: 0 | Rating: 0 ]
- Switching Regulator Basics
- Switching Regulator Basics By Mike Martell N1HFX
[ Hits: 432 | Votes: 0 | Rating: 0 ]
- Modifying HP Proliant Server Power Supplies
- This article documents the modification of 2 types of Hewlett Packard switching power supplies to enable their use as power sources for ham radio equipment
[ Hits: 1716 | Votes: 3 | Rating: 7.1 ]
- Repairing switchmode power supplies
- Notes on the Troubleshooting and Repair of Small Switchmode Power Supplies
[ Hits: 540 | Votes: 1 | Rating: 2 ]
- Converting PC Power Supply
- Converting a PC Switching Power Supply to 13.5V by AA3SJ
[ Hits: 1139 | Votes: 4 | Rating: 7.25 ]
- QRP NESCAF Kit
- The New England QRP NESCAF Kit Switched Capacitor Audio Filter by N5ESE
[ Hits: 473 | Votes: 0 | Rating: 0 ]
- Switched Capacitive Audio Filter
- NEScaf: A Switched Capacitive Audio Filter
[ Hits: 403 | Votes: 0 | Rating: 0 ]
- N5ES - Outboard T/R Switch
- N5ES Outboard T/R Switch For QRP Separates
[ Hits: 495 | Votes: 1 | Rating: 5 ]
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