Concur with Wayne. Certainly Type 12. The UHF frequencies were via a transverter driven by T-11 and T-13 VHF transmitters. I've never seen that many UHF channels in a Type 12 setup. The USAF T-37s used the transverter but not with that many channels. Anyway, it's all ARC equipment.

K3HVG

On 05/16/2023 8:37 PM EDT [email protected] wrote:

Rather reminds me of a radio installation I saw in an early model OH-13 in the South Carolina Military Museum. Inside a box mounted atop the instrument panel clearly what was a ARC Type 12 installation, not just the control box but the whole set..

By the way, the ARC Type 12 VHF transmitter was used as a back up transmitter in later Army helicopters such as the UH-1H.

Wayne

WB5WSV

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