<< Thanks for your prompt reply. I thought about using a 4:1 (150 to 600) matching transformer with the Heil balanced cable with the two wires outside the shild for the PTT. This is what I was thinking at first.
As for the balanced to unbalanced match, well you got me there. I am wide open for any and all information you could give me on this issue.>>
Normally you go from balanced to unbalanced by feeding the two "hot" conductors to the input of the transformer and then run the ground to one of the output leads and use that for the unbalanced ground connection and the remaining output lead as the hot. You could even go to RS and get one of their balanced to unbalanced audio adapters. It does all this in a shlelded case.
<<How would I configure the PTT, this mic does not even have an ON/Off switch. >>
Most mikes in those day came both ways - with or without. PTT is easy - a SPST switch. You can use push button, slide switch, lever switch. momentaty contact. Mount it in the base, use a hand switch, use a foot switch. I use a foot switch for my TS-570, a handheld pushbutton switch on my portable rig and a D-104/TUG8 stand on my new KWM-2A. Personally, I don't like desk mikes. It's hard to get my mouth 2" from them, and that's the best way to work. I use Heil Headsets for the 570 and the portable rig. MUCH better sounding audio and no background noise. On a classic tube AM or SSB rig, a desk mike looks teriffic and that's why the 104 on the Collins.
<<I have thought about using the mic with one of the Mic EQ's made by ND2M. I like to build and it is much cheaper than the W2IHY systems.>>
Don't know beans about that one. Again, personally, unless there is some particular problem to deal with, equalizers on ham rigs are either a waste of money or an ego trip, or both.
With the exception of vintage AM gear, there's no reason to try to sound like a broadcasting station.
Good Luck with the project. I hope I have been of some assistance.
Lon - N3ZKP