Below are files that can be quite useful in converting these surplus boxes for narrow band 10,368 operation. There is nothing overly difficult about the conversion but you would be well advised to proceed with caution. The margin of error is fairly small. Take your time and fully read the directions a couple of time and mentally think through the step you are about to do before you even start. Read, think and plan, then read, think and plan again. Then go slow. You should be rewarded with a great 10 GHz transverter at fairly low cost. One word of extra caution, when soldering or unsoldering connections on the circulators, use as little heat as possible. If your soldering iron temperature is too high the traces will simply vaporize. You don't want that to happen.
You also need to know that there are at least two different versions of the Whitebox available. The conversion information will not match up exactly if you do not have the same unit described in the article. That does not mean the article is of no use. You just need to be careful and proceed with extra caution. Or simply use the another conversion article.
If you also purchased one of the crystal oscillators to supply the 106.5000 MHz signal to the Phase Locked Oscillator you have saved yourself a step. It might be best to also change some of the special connector M/A Com used, such as the reference signal input to SMA connectors. That way you can avoided using those special connectors. The IF in and out can also be changed to SMA fairly easily. These mods just make life a little simpler in the end.
Good luck. See you on 10,368.
A whitebox conversion article by Peter Day, G3PHO 814K
A whitebox conversion by Dave Glawson, WA6CGR. Very comprehensive and big file - 2837K