Power Chokes
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Power Chokes: Large Transmitter Applications

UTC Swinging Power Choke
0.4 Hy @ 1.75 amps
0.7 Hy @ 0.15 amps
(CPW) E7770
UTC swinging power choke. 0.4 Hy @ 1.75 amps, 0.7 Hy @ 0.15 amps. DCR = 0.9 ohm. 1500v Hipot. 5-3/4"D x 7-1/8"H. Used, removed. Only one available.
 

UTC Swinging Power Choke
0.7 Hy @ 1.10 amps
1.1 Hy @ 0.10 amps
(CPW) E7773
UTC swinging power choke. 0.7 Hy @ 1.10 amps, 1.1 Hy @ 0.10 amps. DCR = 4 ohm. 8kv Hipot. 5"D x 5-1/2"H. Used, but in excellent condition. Only 2 available.
$195
 
$155 each

Power Choke Reactor
0.6 Hy C.T. / 2.5 amps / 115v

(CPW) 9893-406014
Power choke reactor. 0.6 Henry C.T., 2.5 amps, 115 volts, DCR: 6 ohm. NSN: 5950-00-795-5549.

• Dimensions: 3-1/2" x 4" x 6"H
 

Power Choke
1 Hy / 1.0 adc

(CPW) BE10426001
Basler Electric power choke. 1 Henry, 1.0 adc. 21 lbs. Made for Gates / Harris broadcast transmitter. Gates P/N: 476-0298-000.

• Dimensions: 6-1/4" x 4-5/8" x 5-1/4"H
$125 each
 
$125 each

Hitran Inductor
0.75 Hy / 4.5 adc
(CPW) AP0475
Hitran inductor. 0.75 Henry, 4.5 adc, 12 kv test. 9" x 5-1/4" base, 8-1/4" high. Catalog #: AP0475. Alt. P/N: AP0194-1. Used, excellent condition.
 

Hitran Inductor
1.4 Hy / 1.5 adc

(CPW) AP0476
Hitran inductor. 1.4 Henry, 1.5 adc, 12 kv test. 9" x 5-1/4" base, 8-1/4" high. Catalog #: AP0476. Alt. P/N: AP0195-1. Used, excellent condition.
$375 each
 
$275 each

Power Choke
1.3 Hy / 1.5 adc

(CPW) 476-0264
Basler Electric power choke. 1.3 Henry, 1.5 adc. 22 lbs. Made for Gates / Harris broadcast transmitter. Gates P/N: 476-0264-000.

• Dimensions: 5-1/4" x 5-1/2" x 4-1/2"H
 

Transformer Choke
2.5 Hy / 700 ma

(CPW) 21656
Freed transformer choke.  Hermetically sealed. 2.5 Henry, 700 ma, 100 / 120 cycles. DCR: 23 ohm, 1 kwv. NSN: 5950-00-647-7936.

• Dimensions: 3.18" x 3.40" x 5.2"H
$135 each
 
$117 each

Transformer
2.6 Hy @ 4 amps / 6 ohms DCR
(CPW) 8494093-1
Kenyon Transformer Co. transformer. 2.6 Hy @ 4 amps. DC resistance = 6 ohm. 6-1/2" x 9" base, 8-1/2" high. Weighs 69 lbs. Alt. P/N: S-501348.
 

Filter Reactor
3 Hy @ 15 dca @ 1200v / 380 cycles
(CPW) 10125
Magnatran filter reactor. 3 Hy @ 15 dca @ 1200v, 380 cycles. DC resistance = 6.6 ohm, operating volts = 25 kvdc. 59 gallon oil (may contain PCB). 36" x 59" max dimensions. New, never used. Made for Gates Radio. Harris P/N: 476-0339-000. Catalog # 10125, Diag. A91-10125.
$435 each
 
$9,500

UTC Swinging Choke
3 Hy @ 414 ma
15 Hy @ 50 ma
(CPW) F3584
UTC swinging choke. 3 Hy @ 414 ma, 15 Hy @ 50 ma. 875 wv. 4-3/8" diameter x 5-1/2"H. NSN: 5950-00-647-7098. Only one available.
 

High Voltage Choke
4 Hy @ 850 ma / 10 kv
(CPW) 949430
Electro Engineering high voltage choke. 4 Hy @ 850 ma, 10kv. RCA transmitter. 5" x 5" x 7"H. 26 lbs. Alt. P/N: E12873. Used, clean.
$265
 
$225 each

Power Filter Choke
4.4 Hy @ 675 ma / 3 kv / 30 ohm DCR
(CPW) AC3138
American Magnetics Corp. power filter choke. 4.4 Hy @ 675 ma, 3 kv, 30 ohm DCR. Hermetically sealed. Base mount flanges. Top terminals. 4-1/4" x 4-1/4" x 5-1/2"H. Made for Harris Transmitter. Harris P/N: 476-0160-00.
 

UTC Swinging Power Choke
2.5 Hy @ 0.65 amps
5.7 Hy @ 0.10 amps
(CPW) E7772
UTC swinging power choke. 2.5 Hy @ 0.65 amps, 5.7 Hy @ 0.10 amps. DCR = 16 ohm. 2000v Hipot. 4-3/8"D x 5-1/2"H. Used, removed. Only 4 available.
$85 each
 
$109 each

Filter Choke
8 Hy @ 550madc
60 Ohms / 6,000v test
(CPW) 25C94
Thordarson filter choke. 8 Hy @ 550 madc. 60 ohms, 6,000v test. Sealed, bottom terminals. 5-3/8" square x 4-5/8"H. Weighs 15 pounds.
 

High Voltage Choke
10 Hy @ 600 ma / 4 kv wkg / DCR = 55 ohms
(CPW) 949430
Electro Engineering high voltage choke. 10 Hy @ 600 ma, 4kv wkg, DCR = 55 ohms. RCA transmitter. 6" x 6" base, 8"H. Alt. P/N: RCA B 3462668. Used, clean.
$149 each
 
$375 each

Swinging Choke
12 Hy @ 1.1 amps
5 Hy @ 1.7 amps
(CPW) CS13879
Also removed from Wilcox transmitters just like his brethren above. A perfect match for the TP-43074 plate transformer. 5kv test voltage. 21 ohm DCR. Made by Thermador Electric for Wilcox. 6-1/4" x 8-1/4" x 9-3/4" high (w/ insulators).
 

Swinging Choke
15 Hy @ 60ma
3 Hy @ 6 amps
(CPW) CS13892
Removed from Wilcox transmitters, these bad boys are looking for a new job. An ideal power supply choke for that brute supply. 3kv test voltage. Made by Thermador Electric for Wilcox. 5-1/4" x 6-1/4" x 8-1/4" high (w/ insulators). DCR is 111 ohms. Wilcox P/N: 38057.
$350 each
 
$195 each

Filter Choke
15 Hy @ 600ma
(CPW) 38058
Companion choke to swinger above. 15 Henry @ 600 ma. Removed from Wilcox transmitters. 3kv test voltage. Made by Thermador Electric for Wilcox. 5-1/4" x 6-1/4" x 8-1/4" high (w/ insulators). DCR is 111 ohms.
 

Basler Choke
1 Hy / 4.5 amps / 1.6 kvw
(CPW) 510-0503
Basler made this beauty for Continental Electronics. DCR of only 10 ohms. 1 Henry, 4.5 amps, 1.6 kvw. Epoxy coated. Basler part number BE10325-001. 6-1/4" x 6-1/2" x 7-1/2" high. New.
$195 each
 
$325 each

Filter Choke
2 Hy / 4.2 amps / 8 kv
(CPW) 1415A01
Broadcast transmitter salvage. Has lots of life left. Magnatran filter choke removed from 20kw RCA transmitter. 25 kv test voltage. 6 ohms DC resistance. 2 Henry, 4.2 amps, 8 kv. 10" x 13" x 16".
 

Power Choke
1.65 mH / 40 amps / 2500 wv
(CPW) 61-64036
Regional Mfg. power choke. 1.65 mH, 40 amps, 2500 wv. Measures 4-1/2" x 5-1/4" x 3-3/4"H. Weighs 14 lbs.
$199 each
 
$75 each

Power Reactor
4.4 mH / 70 amps / 1kv Test
(CPW) 312509-1
Power reactor. 4.4 mH @ 70 amps, 1kv test. DC resistance: Too low to measure. Terminal strip connection. 0.118" square copper winding (9 AWG). 6" x 4" x 6" high. Weighs 13.5 lbs. NSN: 5950-01-177-9491.
 

Open Frame Power Choke
10 mH / 13 amps / 0.125 ohms DCR
(CPW) 204679
NJE Corp. open frame power choke. 10 mH, 13 amps, 0.125 ohms DCR. 3-1/4" x 3-3/4" x 4-1/4"H. NSN: 5950-00-941-5538.
$150 each
 
$75 each
 

Filter Choke
Series: 80 mH @ 2.5 adc, 0.60 ohms DCR
Parallel: 20 mH @ 5 adc, 0.15 ohms DCR
(CPW) C-2691
Stancor filter choke. 1500v RMS. Series: 80 mH @ 2.5 adc, 0.60 ohms DC resistance. Parallel: 20 mH @ 5 adc, 0.15 ohms DC resistance. 3-1/4" x 4" x 3-3/4"H.
 
 
$45 each
 

Power Choke
11 mH / 50 amps / 2.5 kvw
(CPW) 61-64061
Regional Mfg. special made a handful of these power chokes for Ballantyne. 11 mH, 50 amps, 2.5 kvw. 3/16" square copper wound. 6-1/2" x 11-1/2" x 8" high max dimensions. Weighs 68 lbs. New.
 

Power Choke
85 mH / 22 amps
(CPW) 37420
Power choke. 85 mH, 22 amps. DC resistance = 0.3 ohm. Dimensions: 5-1/2" x 6-1/4" x 8"H.
$250 each
 
$125 each

Power Choke
145 mH / 6 amps
(CPW) 37419
Power choke. 145 mH, 6 amps. DC resistance = 0.6 ohm. Dimensions: 5" x 6" x 6"H.
 

"Retard Coil" Power Choke
800 mH / 1.4 amps

(CPW) KS8784
Western Electric "Retard Coil" power choke. 800 mH, 1.4 amps operating current. 4 ohms DCR. Hermetically sealed. 1/4" - 20 corner studs. 6.719" x 5.188" x 6.5"H. Some boxes are packed with January 31st, 1945 NY Times, but most were stored without boxes and have scratches.

Early Western Electric audio amplifier designs from the 20’s, used through the 50’s, implemented the Retard Coil, later known as a plate choke.  In the early days these were low current and very high quality.  This coil is actually made by Western Electric.  Hard-to-find gems like this are harder for us to find. NSN: 5950-00-147-5303.
$65 each
 
$175 each