The stock antenna for the GRC-106 in a M151 is a AN/GRA-50 It has three MS-116A, a MS-118A and MS-117A mast Sections and uses a AB-652 base.
The GRC-106 has two antenna connections, the first is a N connector for 50 Ohm loads and the second is a high impedance connection for use with that antenna. There is a lot of misunderstanding about the antenna tuner in the 106, by design
it only works with fifty Ohm or that one type of antenna and was never intended as a broad antenna tuner. The whip antenna settles down and works well on high frequencies but can be squirrely on the low bands like eighty meters.
Ray F/KA3EKH
From: Scott Pastor <[email protected]>
Sent: Tuesday, October 24, 2023 8:46 AM
To: Ray Fantini <[email protected]>
Cc: [email protected]; [email protected]
Subject: Re: [MRCA] Able Archer 83 AAR
Ray,
Thanks for the excellent AAR. Can you share more information on the 14-foot vertical on the MUTT?
Thanks and 73
Scott, kc8kbk