LTM450FW ceramic filter 450 KHz

1.90 

Categoría:

Descripción

LTM450FW ceramic filter 450 KHz

Replacement for YAESU VX-6R VX-7R Signal Crash 450F Filter

6 ELEMENT CERAMIC FILTER

Ultra small size high selectivity type ceramic filter for communication use.

FEATURES

  • Ultra small size
  • 6.3 mm profile
  • Broad bandwidth
  • High selectivity
  • 6 elements

PACKAGE DIMENSIONS (mm)

LTM450FW Ceramic filter Front, Side and Bottom views

OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS

PART NUMBER

 

 

CENTER

FREQUENCY

(KHz)

 

INSERTION

LOSS

(dB) MAX.

 

PASS BAND

RIPPLE

(dB) MAX.

 

6 dB

BANDWIDTH

(KHz) MIN.

 

50 dB

BANDWIDTH

(dB) MAX.

 

STOP BAND ATT.

±100KHZ

(dB) MIN.

 

INPUT / OUTPUT

IMPEDANCE

(Q)

 

LTM450BW 450 ±2.0 4 2 ±15 ±30 45 1500
LTM450CW 450 ±2.0 4 2 ±12.5 ±24 45 1500
LTM450DW 450 ±1.5 4 2 ±10 ±20 45 1500
LTM450EW 450 ±1.5 6 2 ±7.5 ±15 45 1500
LTM450FW 450 ±1.5 6 2 ±6 ±12.5 45 2000
LTM450GW 450 ±1.5 6 2 ±4.5 ±10 45 2000
LTM450HW 450 ±1.0 6 2 ±3 ±9 55 2000

LTM450FW - Measuring Circuit LTM450FW ceramic filter - Characteristics

Note: To avoid potential problems, connect the output to an IF amplifier through a DC cut capacitor.

Avoid applying a direct current to output end of the ceramic filters.

For Signal Crash. Low Sensitivity on FM replace the 450KHz ceramic filter on PCB CF2002

This shows the original/bad filter. On the VX7R, the filter for the main receiver (CF2002) is the Toko part directly below the volume knob. The filter for the sub-receiver is the other part. On the VX6R there is only one filter.

This shows the original/bad filter. On the VX7R, the filter for the main receiver (CF2002) is the Toko part

Desolder the old filter. The filter is a 5-pin device, in/out and three ground. The three ground pins will take a little bit more effort to desolder. A Metcal 700F tip and pump-type solder sucker are my preferred tools. Clean up with additional flux and solder braid.

Solder the new part in place. Clean up any flux residue, inspect for any junk like solder balls or bridges and re-assemble.