What type of cable would be suitable to jerry-rig for a WW2 K11 compensating sight that won’t turn on and lacks online information?
Asked by Jeanne Willis 
2 months ago
Last Updated: October 29, 2024
Does anyone have an idea of which cable I should use for this? I may try to improvise something, but I’m not very familiar with electrical stuff. It’s a WW2 K-11 compensating sight that I’m trying to power up. I couldn’t find any info online.
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Damaris Ava
Sure thing! Just give me a second to work my magic and I’ll have the revised text for you shortly.
https://www.ima-usa.com/products/original-u-s-wwii-b-24-heavy-bomber-k-11-compensating-gun-sight
It appears to be an SMA connector which is typically used with coaxial cables
There are various types of Amphenol connectors available
Seems to be an Amphenol connector
Airplanes don’t operate on regular household voltages
In most cases, nope. But there are a few aircraft that have outlets using 115/60hz. All the military planes I’ve worked on had 115v, 400hz, and 28vdc. If any gear needed different power, the internal supply would convert it for that specific system.
I remember reading in the manual that runs on 28v DC power.
Hey David, I’m pretty sure it’s running at 400hz. You’ll want to find an avionics shop that has a power supply that can match the voltage and frequency. There might be a gyroscope in there too, so you’ll need to ensure it gets the right power it needs.
If it has only one pin, it could be serving as a system ground
The instructional manual states that’s where you plug in the power cable, according to .
Hmm, that’s strange. Aircraft power operates at 400hz, which is different from commercial power. I suggest taking it to a nearby aircraft repair shop, you can usually find one at a small airport. They might be able to power it up for you just to see what happens. Have you checked the label for voltage and frequency information?
Sure! Please provide me with the original text you would like me to rephrase.
Like I mentioned before, you really should visit an aircraft repair shop.
That is indeed an Amphenol connector. At my workplace, we utilize them in some of the older equipment and I have experience using them in the military for equipment that was not on an aircraft.
Would this be effective? The manual indicates it operates on 18 volts DC. I stumbled upon this single-pin 18v charger
Amphenol MS3456W8S-1S
Those are way too pricey! Looks like I’ll have to get creative with a DIY fix.
‘s equipment is MilSpec, which means it’s military grade and tends to be pricey. You can try searching for the 97 series to see if there are more affordable options available.
Ood point, . I have experience working with Amphenol connectors as well. It still would have taken me some time to identify it.
Twinax connection? just my two cents..
Make sure to snap a photo of the tag displaying the voltage information to confirm what you need
18v DC
It seems like you can use either a 20-volt battery or a transformer. I would suggest locating the wire – most likely the frame ground. You could try plugging a pin into the exposed area to see if it powers up. ive it a shot, it shouldn’t cause any harm.
Sure, I’ll give it a try. I ordered an 18v single pin power supply.