Primex Aerospace 543-1 random noise generator, an aircraft test box with a built-in speaker, PTT and signal jacks, a PWR/PTT switch and a SIG/SPKR output switch. The same part number is sold today under Pacific Electro Dynamics (Astronics).

Condition: it powers on. The front panel is cracked below the power switch (see the close-up). The signal and audio adjustment seals are intact. Last calibrated February 2018 (KELI Labs), so the calibration has expired.

Please note video of power on with audio.

Included, as pictured:

543-1 random noise generator
Apache 1800 hard case with foam
Test leads, as shown
Shop tool catalog sheet

30-day returns: if it isn't as described, return it within 30 days for a full refund.

In stock and ready to ship: ships within 2 business days of payment.

Surplus from an aircraft maintenance shop's tool room in Rome, NY; its tool labels are still on it.

Please read before buying

Sold as-is, where-is: no warranty or guarantee, stated or implied, including of calibration, accuracy, airworthiness or fitness for any particular aircraft or use.
Not calibrated. Any calibration stickers are expired and shown for reference only. Have it inspected and calibrated by a qualified facility before use.
The photos show the actual item. Only what's pictured and listed is included.
I'm not an avionics technician. The description comes from the labels, the paperwork and what I could check myself, so please ask any questions before you buy.
No FAA or traceability paperwork.
Ships within the US only, insured. Orders of $750 or more need a signature on delivery. No package forwarders.
If there's a problem, please message me first so I can help sort it out.

Brand	Primex
MPN	543-1

Primex Pacific Electro Dynamics 543-1 Random Noise Generator Aircraft Test Box

Specifications

Returns Accepted