Filters: Ceramic & Crystal

Communications Band Pass Filter
25 KHz

(FBP) 138-5-2
Communications band pass filter. 25 KHz. 5 terminals on bottom. 1-3/8" square x 2-1/8" high. Marked 5M 814/74.
NSN: 5915-00-501-4184.

 

Band Pass Filter
100 KHz

(FLX) D168856
Band pass filter. 100 KHz. Pass band = 99 - 101 kc. 1-5/8"D x 2-7/8"H. Made in 1955.
*** SOLD OUT ***
 
 
$75 each

Crystal Filter
10.7 MHz

(FLX) 27-03-011
CTS Knights 10.7 MHz crystal filter.
 

Crystal Filter
86.316 Center Frequency

(COL) 293-1042-010
McCoy crystal filter. 86.316 center frequency. ±22.5 KHz @ 3 dB down, ±45 KHz @ 35 dB down. 3.5 dB insertion loss. VSWR < 2:1. 50 ohm in & out. 7/16" x 13/16" x 3/8"H. McCoy P/N: 2B759. NSN: 5915-01-331-5894.

$15 each
 
$125 each

Low Pass Filter
FC = 5.500 MHz

(FLP) 328650-1
Magnavox low pass filter. FC = 5.500 MHz, Zs = 500 ohms, Zl = 50 ohms. 0.94" x 1.5" x 0.74"H. NSN: 5915-410-5381.
 

Low Pass Filter
30 KHz

(FLP) 20-0382-00
Hisonic low pass filter. 30 KHz. 5100 ohms in / out. 1-1/4" x 2" x 0.842" high. Com: case. NSN: 5915-233-5449.
$49 each
 
$75 each

Crystal Filter
11.7 MHz Center Frequency

(FLX) 961-0691-2
CTS Knights crystal filter. 11.7 MHz center frequency. 28 KHz, 3 dB bandwidth. 3/4" x 1-1/2" x 5/8"H. Harris P/N: 522-0002-000.
 

Crystal Filter
65.46 MHz Center Frequency

(FLX) 961-0692-0
CTS Knights crystal BP filter. 65.46 MHz center frequency. 48 KHz, 3 dB bandwidth. 3/4" x 1-1/2" x 5/8"H. Harris P/N: 522-0003-000.
$28 each - $25 (5+)
 
$19 each - $15 (5+)

Crystal Filter
C.F. 1,750 KHz LSB

(FLX) 484-0045
Filtech crystal filter. C.F. = 1,750 KHz LSB. SMC connector in & out. Harris P/N: 484-0045-000.
 

Crystal Filter
C.F. 1,750 KHz USB

(FLX) 484-0044
Filtech crystal filter. C.F. = 1,750 KHz USB. SMC connector in & out. Harris P/N: 484-0044-000.
$85 each
 
$85 each

Channel Filter
45 MHz / 4 Pole

(FLX) QMF45F30B
Hy-Q 45.000 MHz crystal filter. Packaged as an individually matched pair still in their original factory-sealed envelopes. Sold as a pair in a matched set.
• 4 Pole
Bandwidth: 3 dB, ± 15kHz
Stop bandwidth: 40 dB, ± 60kHz
Ripple: 1 dB max
Insertion Loss: 3 dB max
Attenuation: 70 dB, +500/-200kHz
Terminating impedance: 800 ohms,
3 pF
Temperature range: -20 to +70 C
 

FM Radio Filter System
10.7 MHz / 4 Pole

(FLX) XTAL-FM
Two pole monolythic Tchebycheff crystal filters combine in ±7kc system. Spec sheets and recommended schematics are included. Sold as a pair in a matched set.

Bandwidth: ± 3.75kc min @ -3 dB. ±14 kc min @ -40dB.

$15 each - $13 (10+)
 
$7 each - $6 (4+), $5.50 (13+)

Ceramic IF Filter
455 KHz

(FLX) LF-D6
455 KHz Ceramic IF Filter. -6dB pt = 6 KHz. 11 KHz @ -60dB. 2:1 shape factor. 1500 ohm in / out impedance. 1.9dB insertion loss. Dimensions: 2.5mm L x 7.5mm W x 10.5mm H. 4mm x 20mm pin spacing. Mfg: NTK. Same as Murata CFR455H. Fits many popular receivers and greatly improves slope. The LF-D6 is a direct replacement for Yaesu FRG7700 & Panasonic RF4900.
 

Sawtek Filter
19 MHz @ 3 dB Bandwidth / 70 MHz C.F.

(FLX) 850901
19 MHz @ 3 dB bandwidth, 70 MHz center frequency. Spec sheets and recommended schematics are included. Passband ripple: 1dB max.

Bandwidth: 16.5 MHz @ 1 dB. 19 MHz @ 3 dB. 27 MHz @ 40 dB.
Stopband Rejection: 50-55 MHz, 50 dB min. 90-100 MHz, 50 dB min.

$16.90 each
 
$10 each - $9 (8+), $8 (25+)

Filter
91 MHz Center Frequency

(FBP) 101B5
McCoy filter. 91 MHz center frequency.
 

Filter
21.4 MHz

(FLX) 27-03-010
Heath Dynamic part number A2740. 21.4 MHz crystal filter.
$15 each

(FLX) PTI-5530
Piezo version of above 21.4 MHz crystal filter.
$25 each
 
$15 each

Audio Filter
4.5 MHz TV / FM

(FLX) SFE4.5MBF (FLX) TP54-5MB2
(FLX) SFE4.5MBF
Murata two pole ceramic filter made for use in TV sound. 8 dB insertion loss. 3dB BW = ± 60 KHz. 20 dB, BW = ± 530 KHz. 1 KHz impedance. Spur response 20 dB min. 50 vdc. Yellow body.
 

Ladder Filter
455 KHz

(FLX) SFG456F
Ceramic filter. Fc= 455 KHz. 6 dB, BW = ± 6 KHz.
$2 each - $1.50 (10+), $1 (25+)
 
$1.25 each - $1 (100+), 75¢ (500+)

(FLX) TP54-5MB2
Murata two pole ceramic filter. Blue and smaller than (FLX) SFE4.5MBF ceramic filter. No specs at this time.
 

 
$1.25 each - $1 (10+), 85¢ (25+)
 
 

NKT Ceramic Filter
6 dB Bandwidth, ±7.5 KHz / 50 dB Bandwidth, ±15 KHz

(FLX) LF-H15S
NTK ceramic filter. 455 kHz center frequency
• 6 dB Bandwidth, ±7.5 KHz
• 50 dB Bandwidth, ±15 KHz
• Stop band rejection, ±100 KHz, 40 dB
• 6 dB max insertion loss
Input / Output impedance: 1.5k ohms
Ripple: 2 dB max
Dimensions: 0.433"L x 0.275"W x 0.334"H
 

Freed Transformer
FC = 300 cps

(FHP) 33757
Freed transformer, hermetically sealed. FC = 300 cps.

3 terminal:
• 1 in - 600 ohm
• 2 out - 10,000 ohm
• 3 Common
Dimensions:
1-3/4" x 2-1/2"H
$5 each - $4.50 (10+)
 
$35 each

Ceramic Filter
455 KHz

(FLX) CFL455G3
Surplus Sales' OEM supplied us with the following nomenclature: Murata ceramic filter. Fc= 455 KHz. 6 dB band width = ±4.5 KHz. However, one of our best customers swept the filter and found the following information. (PDF)
 

Bandpass Filter
595 c.p.s. / 20 dB

(FBP) 1218-2
Dietz design filter is 2" x 3" x 2-1/2" high. Octal tube base. 595 cps, 20 dB.
$4 each - $3 (20+), $2.50 (100+), $2 (500+)
 
$25 each

Murata Filter
855.2 Hz

(MIS) 44-0080
Decoder circuit board includes Murata 855.2 Hz filter. Many other cool parts. Measures 3" x 6".
 

Lowpass Filter
1 KHz

(FLP) LMI-1000
UTC / TRW low pass filter cuts off at 1 KHz. 10K ohm in / output impedance. Hermetically sealed. 1-1/8" x 1-5/8" x 1-11/16" high.
$15 each
 
$17.95 each - $15 (6+)

Collins Crystal Filter
70 KHz

Collins Crystal Filter
(COL) 207-0002-020
Collins crystal filter. CF 13.8 MHz, BW 70 KHz. SCP P/N: 61080-001.
 

Filter
75 MHz

(FLX) 6736
PTI 75 MHz filter. 20KHz BW, 50 Ohm. This filter was used in Scientific Radio Systems (SRS) 1980's transceiver.
$225 each
 
$19 each - $15 (10+)

 
(FLP) 3306/D
Passband low pass filter. 1 - 20 Hz, cutoff 50 Hz same as above except damaged connectors.
 
 
$65 each
 

Murata SAW Filter
10 MHz

(FLX) SAF10.7ME
Murata SAW filter. 10.7 MHz.
 

Murata Ceramic Filter
455 KHz

(FLX) CFS455F
Murata ceramic filter. 455 KHz, 15 element. 6 dB bandwidth = ± 6 KHz.
$7 each - $6 (6+)
 
*** SOLD OUT ***
 

Miscellaneous Filters

Part Number
Description
Price Each
 
(FLX) FHA-103-4 10.7 MHz Tokyo Filter
SOLD OUT
-
(FLX) TL-23D11-36C1 Fc= 500 KHz; 6dB BW = 10 KHz, 60 dB BW = 36 KHz
15.00