Ray

I have one like you describe, but have never run it, I noticed the difference, but didn’t give it much thought.  I bought it as a spare for my GRC-122 setup.  I’ll drag it out and evaluate, especially if it is quieter!

Scott W7SVJ

From: [email protected] <[email protected]> On Behalf Of Ray Fantini
Sent: Thursday, June 15, 2023 18:21
To: MMRCG <[email protected]>; [email protected]
Subject: [MRCA] AN/GRC-106A

Been doing a couple more GRC-106 set up and found something completely different! I am use to the AM-3349 amplifier having a case with the top section removable from the rest of the case and two access panels on the top, one for 2A6A1 the inverter and the other for 2A6B1 the blower assembly. Have two amplifier cases that are all welded and only have a removable 2A6A1 inverter and no panel for the blower. They both are General Dynamics manufacture and arrived with relatively late production RT-834 with 1974 date codes. The big thing is that when running the amplifier, it is noticeably quieter then the two part non welded amplifier that I am use to. My 1990 TM 11-5820-520-34 only shows the two-plate version of the amplifier and not the welded amplifier case. Anyone have any ideas?

Ray F/KA3EKH