Here is a nice MFJ artificial
ground. You will find, and be able to download, the manual here
This 931 is still being produced by MJF and this one works
100%. As you can see in the pictures, there are no signs of
burning, arcing, etc. There are a couple of very small scratch
marks on the top. Otherwise it is in excellent condition. The
price is $75.00 which INCLUDES shipping.