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.
 
 
$225 each
 

Low Pass Filter
1 - 20 Hz

(FLP) 3306
Passband low pass filter. 1 - 20 Hz, cutoff 50 Hz. "BNC" connectors. Source 500 ohm, load 10M ohm. 5-1/2" long.
$99 each

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

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.
$65 each
 
$19 each - $15 (10+)

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