Tag: equipment

New antenna analyzer available from DG5MK

If you thought about buying an FA-VA4 but were put off by its upper frequency limit of 100 MHz, you’ll be pleased to know that an FA-VA5 is now available for about $200. Michael Knitter’s (DG5MK) latest antenna analyzer kit has an upper limit of 600 MHz (the lower limit…

INRAD Microphones

INRAD Desk Microphone System is an exciting line of great sounding microphone models. Each INRAD microphone has an attractive stage-style body and a unidirectional cardioid element with unique audio characteristics to accommodate every operator’s voice, radio and preferences. INRAD micrpohones can be connected to most popular amateur radio transceivers, including ICOM, Yaesu, Kenwood, FlexRadio, Elecraft, Ten-Tec products.

“Buried” Coax

I’ll be installing a Hygain AV-640 in the next 2 days and it will be in the backyard about 50 ft behind the house. I was just going to dig a shallow trench and put it in there. However, I was wondering if it is OK to bury coax underground [su_button url=”https://forums.qrz.com/index.php?threads/buried-coax.617020/”]Read the Original Article[/su_button]

A 1-rig solution

400 watts at home; 20 watts portable I received my new transceiver in the mail today, only two days after ordering it. My hopes are that it will be a one-box replacement for the FT-891, KX2 and maybe even my Flex 6300. The radio is a SunSDR2Pro from Russia (via…

Video: Flex 6300 vs. RSPduo

In this corner…weighing in at $265 – the (insert dramatic reverb) RSPduo from SDR Play (end reverb!). With all the ingredients on hand I couldn’t resist pitting David against Goliath. For the few weeks I’ve had the RSPduo, I’ve used it mostly to copy FT8 on various HF bands and…

74HCT240 transmitter

I’m working on a new QRP transmitter based on the 74HCT240 octal buffer, the circuit has been described on many places, even in ARRLs books. Read the Original Article https://forums.qrz.com/index.php?threads/74hct240-transmitter.614973/

Yup – It’s Another Si5351 VFO

To many, this will be just another Si5351 VFO project, with nothing to distinguish it from the others. In fact, that’s exactly what it is. The “how to” of connecting an Arduino board to an Si5351 board, wiring up a display, and loading the firmware, is straightforward, and well established. To…

An Experimental Q Meter

Technical Reference/Test EquipmentThe article describes Q factor, methods of measuring Q factor, inductance and capacity using a Q meter and the design of an experimental Q meter unit.
The Q factor or quality factor of an inductance is commonly expressed as the ratio of its series reactance to its series resistance….