[Walston]

Here are a couple links to information on your SG-7 and instructions on the SG-8. The operating instructions are missing in the SG-7 link but they are the same. The way I tested out my old signal generator is with using a modern digital receiver. That way I was able to confirm the signal it was putting out was in line. I took the signal output and coupled it to the antenna input on my receiver, set the AM in an are where there was no station and adjusted the generator to a low value of output and tuned it until I hear the maximum output on the modern receiver. In my area 800 KC is pretty empty so I started there. This worked very well. Turned out that my generator was quite accurate. I did several in AM and FM to confirm the generator was accurate. I suggest doing this first to ensure when you use it to align the 18 you know it is working properly. It is actually quite easy to do. If this is not clear, let me know.

http://pdf.textfiles.com/manuals/SCANNER...t-SG-8.pdf
http://tubularelectronics.com/Heath_Manu...7/SG-7.pdf