I have as extra the correct mic adapter to use the Ten Tec 708 eight pin mic with the Orion I four pin. This allows you to use the Ten Tec 708 on the Orion I. If interested, please email me direct at N0LYW at ARRL.NET I purchased the adapter new last week and it works perfectly on the Orion I using the Ten Tec 708 mic. Thanks and 73, Lee N0LYW 970-234-8989