RF Coils & Chokes
 
Large Silver RF Coils

Edgewound Fixed Inductor in a
Weatherproof Aluminum Encl.

(IRF) 110974-ENC
Edgewound fixed inductor in a weatherproof aluminum enclosure. Same as right but mounted in a 20" x 24" x 13-1/2" enclosure with a hinged lid. Internal shield allows tap to be placed on coil. 2-1/2" ceramic feedthru on bottom, 4" on top. 7.5 kv spark gap on output. Room for additional components and external cable.
 

Edgewound Fixed Inductor
220 µH / 10 amp

(IRF) 110974
Multronics 7-1/2" diameter edgewound fixed inductor. Silver plated. 220 µH, 10 amp. 0.05" x 0.25" material (silver plated). 48 turns. 7-1/8" x 7-1/8" x 15-3/8".
$750 each
 
$350 each

Edgewound Fixed Inductor
21 µH

(IRF) 232-624-1
Cardwell edgewound fixed inductor. 21 µH. Silver plated stock. 5 turns per inch. 6" overall length. 5-3/4" outside diameter overall. Coil dimensions: 3.875" O.D., 3.275" I.D. 0.25" wide x 0.55" thick flat stock.
 

Gates RF Fixed Coil
78 µH / 30 amp

(IRF) 78-FC2568
Gates RF fixed coil. 78 µH, 30 amp. 7" diameter capacity disc inside coil is adjustable on 5" travel. 3/32" thick, 1/2" wide silver ribbon inductor. 24-3/4" total turns. Turn spacing is 3-3/4" t.p.i. (turns per inch). Overall dimensions: 9" x 9" x 16" long. Includes 1 tap clip.
$109 each
 
$385 each

Gates Transmitter Tank Circuit
5 - 12 MHz

(IRF) L15B
Gates transmitter tank circuit with coupling coil. 5 - 12 MHz. Outer coil = 7" O.D., 1/2" silver tubing, 12 turns. Inner coil = 5" O.D., 1/2" edgewound silver with taps, 5 turns. Overall dimensions: 18" x 11" x 15-3/4" high. New, old (and tarnished) stock.
 

Silver RF Tank Coil
1.8 µF

(IRF) CL143REVA
Silver RF tank coil. 1/4"D tubing. 1.8 µF. 7-1/4 turns, 3-1/8" O.D., 2-3/4" I.D. Taps at 1/2 turn, 2-2/3 turns, 4-1/4 turns, 6-1/2" strap. 6" strap, 4" strap, at end 5" strap. 3 studs, 10 - 24 for mounting. Straps have teflon sleeving.
NSN: 5950-00-702-2936.
$350 each
 
$115 each

Edgewound Fixed Coil
24 µH / 30 amps

(IRF) 943-0398
Gates edgewound fixed coil. 24 µH, 30 amps. 20 turns, 1/2" wide silver coil with log-spacing. Coil dimensions: 6"D x 7-1/4"L. (9-3/8"L - total for unit, 8"D). Internal vacuum cap (not included). Mounting clamps (FM-2) for parallel "C" in LC unit. LC unit made for Gates transmitter. Includes arc gap. Gates P/N: 943-0398-002.
 

Fixed Edgewound Silver Coil
76 µH / 30 amps

(IRF) 76-FC-2568
Gates fixed edgewound silver coil. 76 µH, 30 amps. Coil material measures 3/32" x 1/2" wide. New, unused. Gates P/N: 931-6138-045.

Coil dimensions: 8-5/8"H x 9" dia.
Overall dimensions: 16"H x 12" dia.

$450 each
 
$385 each

Silver Air Wound Coil
0.4 µH

(IRF) 6032-1043
Silver air wound coil. 0.4 µH. 1-1/2" diameter coil, 3-3/4 turns. 1/2" wide strap. Sunair P/N: 6032-104303.
 

Edgewound Fixed Coil
5.5 µH / 15 kw

(IRF) 943-3777
Edgewound fixed coil. 5.5 µH, 15 kw. Includes 1 tap clip. 5" diameter coil, 6 turns. 1/2 copper - bore, 4 turns per inch. Harris IPA filter assembly. Gates P/N: 943-3777-007.
$22 each - $20 (3+)
 
$225 each

Silver Coil Tapping Clip

(IRF) .375CLIP
Silver coil tapping clip for 3/8" diameter silver tubing.
 

Large Ribbon Wound
Inductor Tapping Clip

(IRF) BW-CLIP
Large ribbon wound inductor tapping clip. Harris P/N: 402-0030.
*** SOLD OUT ***
 
*** SOLD OUT ***

Silver RF Coil
20 µH / 20 amp

(IRF) 20-20A
16 turns of 3/8" silver plated flat stock, 4-3/4" diameter, 4-1/2" long coil. 8-1/4" overall height. Great tank coil for RF circuit.
 

RF Coil
22 µH / 20 amp

(IRF) 938-3192
RF coil. 22 µH, 20 amp. Copper - bare - no silver. Capacity trim from end shaft moves grounded assembly in & out. 28 turns (4 TPI). 7" long, 3-3/4" diameter. Edgewound 0.095" x 0.380". Overall dimensions: 10-1/4"L x 4-1/2"D. Harris P/N: 938-3192-001.
$175 each
 
$175 each

Silver RF Coil
18 µH / 5 kw

 

Silver RF Coil
26 µH / 5 kw

(IRF) 200-101-1
Cardwell silver RF coil. 22 turns of 1/4" silver plated flat stock, 4-1/2" diameter, 5-1/4" long coil. 4 turns per inch. 9" overall height. Great tank coil for RF circuit. Tap at any point for exact match. Mfg. P/N: MJ26-10.
$189 each

Silver RF Coil
15 µH / 15 kw

(IRF) 200-0125
Cardwell silver RF coil. 15 turns of 1/4" silver plated flat stock, 4-1/2" diameter, 3-5/8" long coil. 4 turns per inch. 7" overall height. Great tank coil for RF circuit. Tap at any point for exact match.
 
(IRF) 200-306-1
Multronics silver RF coil. 16 turns of 1/2" silver plated flat stock, 5" diameter, 4-3/4" long coil. 4 turns per inch. 9" overall height. Great tank coil for RF circuit. Tap at any point for exact match.
$165 each
 
$265 each

Silver RF Coil
25 µH

(IRF) TANKCOIL-25
15-3/4 turns of 1/4" silver plated tubing jacketed in Teflon. Measures 25 µH total with taps at approximately 1, 2, 8, 12 and 13. Tap connectors provide two screw terminals for connection. Oval coil is about 5" x 9". Spacer supports are composite body with Teflon fingers and have 8-32 brass inserts at ends for mounting.
 

Silver RF Coil
200 µH / 5 kw

(IRF) C35-13510
Silver plated coil similar to above is replacement inductor for military auto tuner. Taper wound low end. Large gauge silver wire. 4" diameter x 24" long. Wound on fiberglass form with 7" diameter aluminum flange on one end.
$49 each - $45 (3+)
 
$175 each

Silver RF Coil
1 mH / 5 kw

(IRF) 10X1121
Silver plated coil appropriate for loading 160 meters or VLF frequencies with 1 mH total inductance. 5-1/2" diameter, 20" long. Wound on fiberglass form. Has 14 ga. wire. Should handle 5 kw +. Fiberglass core. Weighs: 7 pounds.
 

Tank Coil

(IRF) STP150128
Tank coil. 3/8" silver tubing. 4 large turns + 1 small. 4" outside diameter.
$125 each - $110 (5+)
 
$92 each

Silver Tank Strap

(IRF) 151168
Silver tank strap. 0.4" outer diameter. 4-1/2" c-c holes. 6-3/8" overall length.
 

Silver Tank Coil

(IRF) SRSTANK
4-1/2" outer diameter silver tank coil. 0.35" x 0.8" flat stock. 1.5 turns. Broadcast tank. Made for SRS broadcast transmitter.
$23 each
 
$103 each

Silver Tank Coil

(IRF) 151955
4-1/2" outer diameter silver tank coil. 0.67" round stock. 1.5 turns. Broadcast tank. Made for SRS 10 kw transmitter.
 

Silver Tank Coil

(IRF) 150127
4-1/4" outer diameter silver tank coil. 0.40" round stock. 2-1/2" turns. Broadcast tank. Made for SRS 10 kw transmitter.
$107 each
 
$83 each