RF Coils & Chokes
 
Large Silver RF Coils

 

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.
 
 
$109 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.
 

Gates Fixed Edgewound
Silver Coil

(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.
 

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.
$22 each - $20 (3+)
 
$385 each

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.
 

Silver RF Coil
30 µH - 30 amp

(IRF) 30-30A
16 turns of 1/2" silver plated flat stock, 6-1/8" diameter, 4-3/4" long coil. 8-3/4" overall height. Great tank coil for RF circuit.
$175 each
 
$245 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. 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