Power

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 severe winter weather a couple of weeks ago (it never materialized, but that’s beside the point) and I noticed that my noise floor had gone […]

Read More

Switch-Mode vs Linear Supplies

Amateur radio transceivers demand power supplies which have a large current capacity. The average 100 watt radio transceiver requires over 20 Amps when in transmit mode. Overview A linear power supply uses a large heavy transformer to step down the input high voltage AC to a level close to the desired output. From there, the […]

Read More

IC-7300 Average SSB power modification

If you Google the title of this post, I’m sure you’ll come across some results which detail a very simple modification you can make to your IC-7300 which some believe increases the RF output power. This is vague and misleading. The PEP (Peak Envelope Power) of the IC-7300 is rated at 100 watts. This would […]

Read More

Handheld Power Obsession

Or, also known as “linear units in a logarithmic world”. Among the cheap handheld radio community, especially after the release of the Baofeng BF-F8HP, there seems to be this huge obsession with RF transmit power. Yes, the BF-F8HP is rated at 8 Watts on its maximum setting, but what do you really get for that […]

Read More

Baofeng UV-5R+ Harmonics

It seems that the ARRL and a number of individuals have been taking a serious look at harmonics and other spurious emissions from various ham transceivers, including the ubiquitous Baofeng range of handheld transceivers. So, a while ago, I decided to take my Baofeng UV-5R+ to work and see what mine looked like. I don’t […]

Read More