In my opinion hardware differences are insignificant, especially if
you use the Inrad #352 600 Hz roofing filter in the original
Orion. The primary difference is firmware. Orion can use v1 or v2
firmware but Orion II can only use v2 firmware. IMHO v1.373b5 in
Orion is better than the v2 firmware, but I sold my unit before John
Henry's latest versions became available. The v2 display driver is
much better however. Hopefully John will eventually take the best
parts of v1 and v2 and give you the best of both worlds!
Ten-Tec made a very wise move in bringing John Henry back!
73, Bill W4ZV
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