I looked up the battery.  Fair Radio sales has some for sale.  They said the battery is 3 lbs.  So, if I read what you wrote correctly there are three batteries total with the KY-38 and Prc-77 for a total of nine lbs.  Not counting the weight of the crypto unit and the PRC-77 themselves.  Had to have a strong back to carry that thing around.

Glad I was a sailor and the only time I used a PRC-? was when we were on an operation to take some scientists to a ship full of nerve gas being sunk off the coast of NC/SC.  It was heavy, but it just sat in the bottom of the boat.  I was an ET and was assigned this duty as they thought if something broke while out in the motor whaleboat, I could fix it.  yeah right!

George

On Wed, Nov 2, 2022 at 6:25 PM Tim <timsamm@gmail.com> wrote:
Hi George - part of the weight/cubes it that the KY-38 is powered by two BA-4386 batteries, Big battery box... it's a battery hog.... The same battery the PRC-77 uses...times one..
Tim
N6CC

On Wed, Nov 2, 2022 at 5:03 PM George Sliney <gjsliney48@gmail.com> wrote:
I noticed the mistake after I sent the message.  My bad.  Even so, the KY-38 looks rather large and I know the PRC-77 is also heavy.  Tough to lug around in the jungle.

Thanks for the clarification.

George

On Wed, Nov 2, 2022 at 3:42 PM Mike Morrow <kk5f@earthlink.net> wrote:

The photo shows the TSEC/KY-38 connected to the RT-841/PRC-77.

 

The TSEC/KY-28 is NOT shown.  That is the NESTOR crypto unit for AIRCRAFT applications.  Many KY-28s were installed on Vietnam-era Army helicopters for use with their AN/ARC-54 or AN/ARC-131 tactical FM radios.

 

Mike / KK5F

-----Original Message-----
From: George Sliney <gjsliney48@gmail.com>
Sent: Nov 2, 2022 12:42 PM
To: <kk5f@arrl.net>
Cc: Rob Flory <farmer.rob.flory@gmail.com>, milsurplus <milsurplus@mailman.qth.net>
Subject: Re: [Milsurplus] NESTOR: AN/PRC-77 with TSEC/KY-38 *CORRECTED PHOTO*

 

Wow!  That Ky-28 unit looks as large and heavy as the KY-8 units I had aboard my ship.  What contributed to the size and I assume the weight of the KY-28?  I sure did not want to try and lug around a KY-8.  Luckily, all my issues with my KY-8's were from the key insertion device.  The RM's had a lot of difficulty in setting up the slides and inserting the device into the KY-8.  I normally would be in the crypto room "assisting" with the setups.

On Wed, Nov 2, 2022 at 10:18 AM Mike Morrow <kk5f@earthlink.net> wrote:

CORRECTED MIRROR IMAGE PHOTO

 

Attached is a photo of the Vietnam-era man-pack AN/PRC-77 (top) with TSEC/KY-38 NESTOR voice encryption unit (bottom). Plus soldier and M14 rifle. :-)

 

State of the Art in 1968. Dainty ain't it?

 

Mike / KK5F

 

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