Avionic Instruments

Avionic Thermostatic Switch
(SWH) G4-1
United Controls avionic thermostatic switch. Duct therm switch. All chrome plated, copper construction. 1.75"D flange. Sundstrand. New-Surplus. Made in 1959.
NSN: 5930-327-8019.
$650 each
Undervoltage Relay
(KO) 402SX
Wilmar Electronics undervoltage relay with adjustable drop-out point. One normally closed & one normally open contact, 2 amp. 120 vac, 400 Hz. 3-1/2" x 3" x 3"H. 3.9" x 3.5" base plate.
$150 each
Left-Right Bendix
Indicator Compass
(MTR) 1N4A
Sparton left - right Bendix indicator compass. Requires 3-1/8" diameter hole. 2-5/8" behind panel depth. Made in the 1940s - 1950s. New, unused!!
$109 each - $89 (3+)
Dual LED Bar Graph
(MTR) SB202-BXXX
Build your own aircraft carrier...well its a start. Dual LED bar graph. Dynamic and static "Commanded Hook Touch Down Point" indicator. Dual, 100 light LEDs to show distances in feet from starting point. Driven by three SN74145 BCD to decimal ICs and a Motorola SC404000P. The unit consists of a driver board for each LED row that plugs into the dual display board. NOTE: 2 BCD values will select and light 1 LED in a row. New, unused. NSN: 6350-01-311-6625.
$150 each
Bendix Amplifier
115v / 400 Hz
(EQP) 12077-1A
Bendix amplifier. 115v, 400 Hz. Used, removed. Sold as-is.
$25 each
Bendix Radio
Antique Loop Azimuth Indicator
Collector's Item
(MTR) MN-22A
Bendix Radio compass faces "Loop Azimuth Indicators" have a fixed 0-360 degree scale on the outer ring, a movable center ring 0-360 scale that rotates with large knob on lower right (7 o'clock) of face. 5-1/8" across and 2" deep. Side aluminating 28v lights (10 and 5 o'clock) can be changed from top.

Dial is driven at recessed gear as shown on detail. Originally syncho motors accomplished this. New in the box. Dated Feburary 16, 1944.
$99 each
Air Force / Army
Aircraft MPH Gauge
(MTR) 814-37F2
Bendix air force / army aircraft MPH gauge. 0 - 700 MPH. Type F-2. P/N: 1426-37F-A6. 3-1/4" high x 3-1/4" wide. 1-3/4" behind panel depth.
$65 each
Landing Light Canopy
(LMP) B3847
Landing light canopy. Aluminum. 8" diameter. NSN: 6220-00-225-1732.
$35 each
Grimes Landing Light
28 vdc
(LMP) 50-0076-1
Grimes landing light. 28 vdc. 8" diameter. Re-conditioned. NSN: 6220-00-397-6823.
$150 each
400 Hz Transducer
(MTR) 3188
400 Hz transducer. Converts @ 0 - 115 vac, 380 - 420 Hz input to a 0 - 1 madc output signal to drive a standard panel meter. 10 - 32 stud posts in / out. 2-5/8" diameter x 3" high. Useful for any avionic or other 400 Hz power user to monitor line voltage.
$15 each - $13 (3+)