The shutters or sliders are to cover the tuning lamps. The brass tube is most likely a dessicator, some rigs have it, some don't. The four holes at the extreme corners are for covers or lids that protect the panel and controls. Older transmitters use a cover with thumb screws, later ones use spring snaps to hold the cover on. I have seen at least these two versions over the years. Mine have the spring snaps, be careful, the springs are strong and ready to sting your fingers.
B. Gentry, KA2IVY
Hi Hue:
1. Antenna tuning lamp
2. maybe G1, vibrator?
3. Don't know
https://prc68.com/I/GRC109.shtml
-- Have Fun, Brooke Clarke https://www.PRC68.com axioms: 1. The extent to which you can fix or improve something will be limited by how well you understand how it works. 2. Everybody, with no exceptions, holds false beliefs.-------- Original Message --------
Date: Sun, 16 Mar 2025 01:33:58 +0000 From: Hubert Miller <[email protected]> To: "[email protected]" <[email protected]> Subject: [Milsurplus] Questions about the T-784 / GRC-109 Message-ID: <PH0PR20MB43741D34C7D0A1CFAAD559AFE4DC2@PH0PR20MB4374.namprd20.prod.outlook.com> Content-Type: text/plain; charset="us-ascii" I have a lone GRC-9 transmitter. Some questions i have about this: 1. the device just below the power cable on front panel left, what is it ? It looks like some sliding cover requires manipulation, or what ? 2. the brass tube in the cabinet, left side, is that a dessicant holder ? 3. The 4 larger screws in the four corners of the front panel, these are Philips of what size ? I am guessing the previous dimwit owner removed these 4, found these didn't allow opening the set, and then of course, lost the screws. Thanks ! -Hue Miller
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