[MRCA] TRC-77 transceiver XMITTER power "ON" indicator mod

KA1LHZ sboard.ka1lhz at gmail.com
Fri Jun 27 10:17:09 EDT 2025


Why would you want to jump out of a perfectly good airplane? I 
understand if a wing was shot off or it's on fire etc...

73

DE KA1LHZ

Former F-15 avionics specialist

On 6/21/25 2:50 PM, Dave Merrill wrote:
>
> In the 1980s I considered joining the Army Reserve and I went to visit 
> a unit close by. They were a Special Forces outfit and I remember 
> seeing TRC-77s there. I don't know if the SF normally used them or if 
> the Army just unloaded them to reserve units since they were obsolete.
>
> They offered me lunch at the mess hall and that meal alone convinced 
> me that I should walk away. Plus I would have had to go to jump school.
>
>
> --... ...-- Dave N9ZC
>
>
>
> On Sat, Jun 21, 2025, 12:37 PM Anthony Clare <n3kcb at usa.net> wrote:
>
>     Tim,
>
>     It's OK. You used an existing hole. I call that an approved
>     modification.
>
>     n3kcb
>
>
>     ------ Original Message ------
>     *Received: *Sat, 21 Jun 2025 01:47:11 PM EDT
>     *From: *Tim <timsamm at gmail.com>
>     *To: *Army-Radios at groups.io, "mrcg-west at groups.io"
>     <mrcg-west at groups.io>, MMRCG <MMRCG at groups.io>, MRCA
>     <mrca at mailman.qth.net>
>     *Subject: *[MRCA] TRC-77 transceiver XMITTER power "ON" indicator mod
>
>
>     TRC-77 Ops:  I hate mods (I know, I know) but this problem has
>     drained my battery too many times.
>     When the radio is switched to XMIT there is no other
>     indication that the HVPS and filaments are powered waiting for a
>     Key closure in QSK/Break-in mode.  It draws 2 amps while waiting. 
>     So I added a simple LED indicator that shines through an existing
>     panel hole to alert me that I left it in XMIT mode by mistake or
>     accident.  Dumb!
>     Other details here, about halfway down the article:
>     https://www.n6cc.com/trc-77-hf-cw-transceiver/
>
>     IMG_7404-1536x1152.jpg
>     Flame Shields Up !!
>     FYI, Tim
>     N6CC
>
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