Sergey, UR6QW is a ham radio operator in Ukraine who designs and builds excellent audio devices for ham radio operators. I have been a fan of Sergey’s work for years. read more…
Overview A tuning pulser is a device which generates a series of short-duty cycle tone bursts which are applied to the audio input of a transmitter. Instead of tuning up. read more…
You can not make a very good antenna using insulators like PVC tubing, drinking straws, or nylon rope. I think we can all agree on that. Why? Materials like plastic. read more…
In this article, I’m going to cover Noise Figure, Noise Factor, Noise Power, Receiver Bandwidth, and how they can affect overall radio receiver performance. Contrary to popular belief, these metrics. read more…
The RF world is full of esoteric terminology, and not least of these is characteristic impedance, or Z0. Most coaxial cables have a characteristic impedance of 50 or 75 ohms.. read more…
Introduction QUCS, or Quite Universal Circuit Simulator, is a freeware utility that allows you to draw circuit schematics, and perform AC & DC simulation, noise simulation (for S-parameters, and AC. read more…
Antenna tuners seem to be some of the most misunderstood devices in all of amateur radio. In this article, I’ll try to explain what is happening when you use an. read more…
I’ve been using RF sim 99 (aka RFSim99) for over a decade, and it’s proved invaluable again and again during that time, and continues to do so. RFSim99 is a freeware. read more…
Almost everyone has heard of FM, but not everyone has heard of FSK. Frequency Shift Keying is a modulation scheme which utilizes changes in the frequency of the carrier wave. read more…
Maintaining a website such as this can be a chore at times, especially if you have a comments section, or a forum, or open registration. Luckily there is a service. read more…
Please read about how you can help UR6QW in Ukraine here It has arrived! The new version 7 of UR6QW’s processor. Thank you to Sergey for getting it to me. read more…
The South Canadian Amateur Radio Society wins the Hamvention Club Of The Year Award. This event has been held since 1955! Congratulations to all! Please check out the newsletter link. read more…
I usually have a respectable HF noise floor at home, for which I count myself lucky in today’s sea of cheaply made switching power supplies. However, we were expecting some. read more…
While this post is written with the UR6QW processor in mind, it contains information which is widely applicable. There is some concern about connecting dynamic microphones to devices which commonly. read more…
UR6QW
Sergey, UR6QW is a ham radio operator in Ukraine who designs and builds excellent audio devices for ham radio operators. I have been a fan of Sergey’s work for years. read more…
Icom IC-7300 & IC-7610 “Built-In” Tuning Pulser
Overview A tuning pulser is a device which generates a series of short-duty cycle tone bursts which are applied to the audio input of a transmitter. Instead of tuning up. read more…
Antenna Materials & Efficiency
You can not make a very good antenna using insulators like PVC tubing, drinking straws, or nylon rope. I think we can all agree on that. Why? Materials like plastic. read more…
Noise & Receiver Performance
In this article, I’m going to cover Noise Figure, Noise Factor, Noise Power, Receiver Bandwidth, and how they can affect overall radio receiver performance. Contrary to popular belief, these metrics. read more…
What is characteristic impedance?
The RF world is full of esoteric terminology, and not least of these is characteristic impedance, or Z0. Most coaxial cables have a characteristic impedance of 50 or 75 ohms.. read more…
QUCS for Filter Design
Introduction QUCS, or Quite Universal Circuit Simulator, is a freeware utility that allows you to draw circuit schematics, and perform AC & DC simulation, noise simulation (for S-parameters, and AC. read more…
Antenna Tuners, Impedance Matching, and SWR
Antenna tuners seem to be some of the most misunderstood devices in all of amateur radio. In this article, I’ll try to explain what is happening when you use an. read more…
Free RF simulation software
I’ve been using RF sim 99 (aka RFSim99) for over a decade, and it’s proved invaluable again and again during that time, and continues to do so. RFSim99 is a freeware. read more…
Frequency Shift Keying (FSK)
Almost everyone has heard of FM, but not everyone has heard of FSK. Frequency Shift Keying is a modulation scheme which utilizes changes in the frequency of the carrier wave. read more…
Spam, Spam, Spam, Spam!
Maintaining a website such as this can be a chore at times, especially if you have a comments section, or a forum, or open registration. Luckily there is a service. read more…
UR6QW EQ V.7
Please read about how you can help UR6QW in Ukraine here It has arrived! The new version 7 of UR6QW’s processor. Thank you to Sergey for getting it to me. read more…
SCARS News March 3, 2020 | scarsnewsletter
The South Canadian Amateur Radio Society wins the Hamvention Club Of The Year Award. This event has been held since 1955! Congratulations to all! Please check out the newsletter link. read more…
Charger Radiated Emissions
I usually have a respectable HF noise floor at home, for which I count myself lucky in today’s sea of cheaply made switching power supplies. However, we were expecting some. read more…
Baofeng Cemetary
As of the date of this post, you can get a Baofeng UV-5R for $28, or buy two for $50. Dirt cheap. I bought my first Baofeng UV-5R back in. read more…
UR6QW Processor with Dynamic Microphones
While this post is written with the UR6QW processor in mind, it contains information which is widely applicable. There is some concern about connecting dynamic microphones to devices which commonly. read more…