G7UHN has built a very useful additional display for the FT-817/818 transceiver.

 

Andy,  G7UHN has built a very useful additional display for the FT-817/818 transceiver.

T-817 Display Accessory 

SDR Software Tutorial

This is quite interesting as it shows how software is written for SDR radios. It is from the AC2CZ web.

SDR Radio Software Tutorial

High Voltage Transformer Winding Information

High Voltage Transformer Winding Information

Transformer winding

KF8OD has some examples of homemade transformers.

Transformer Build

Amateur Radio Magazine from the American Radio Relay League - Early Issues

Scanned QST issues covering 191 to 1949.

https://www.americanradiohistory.com/QST.htm

RFI Site Survey Using an SDR by NK7Z

NKZ uses an SDR monitor a wideband width over 24 hours to determine possible sources of RFI.

RFI Site Survey Using SDR by NK7z.net

Simple Field Strength Meter VE7SAR

A simple way to make a FS meter using a DVM.

VE7SAR Simple Field Strength Meter

How to Put a Bitx40 on 60M by ND6T

"60 meters in the U.S. is pretty limited, currently only 5 fixed channels and limited to 100 watts effective radiated power, and so it is seldom addressed in commercially built gear. It has good propagation for nearby communication and there is a possibility that a new segment (not channels!) will soon be authorized for QRP operation. The BITX would be perfect since it is easy to program for new allocations."



Bitx on 60 meters

http://www.nd6t.com/bitx/bitx60.htm