455 kHz IF Low Cost Series
A Low-cost Series of torsional mechanical filters has been designed for use in 455 kHz IF circuits. The CW filter has 7 resonators; the SSB
and AM filters have 8 resonators. These filters are a stock item and can be purchased in any quantity. Case style is the plastic PS package.
Other torsional filter designs are available, but usually not as stock items. These filters may have as few as two resonators or as many as 12 resonators
along with a range of other center frequencies, bandwidths, and response shapes. See our product listing or contact us for a more extensive list of available filters.
Typical performance characteristics of the Low Cost Series Filters
| Center Frequency |
455 kHz |
| Insertion Loss |
|
| CW Filters |
3 dB |
| Other Filters |
1.5 dB |
| Passband Ripple |
0.75 dB |
| Source and Load Impedance |
|
| 8733, 8693, 8694, 8695 |
2000 ohms || 30 pF |
| 8734 |
2000 ohms || 30 pF, 560 µH series |
| 8735
|
1000 ohms || 30 pF, 470 µH series |
|
Part
Number
|
3 dB BW
|
60 dB BW
|
Typical
Response
|
|
Typ.
|
Min.
|
Typ.
|
Max.
|
|
526-8733-010
|
300 Hz
|
240 Hz
|
900 Hz
|
1.0 kHz
|
Plot
Spec
|
|
526-8693-010
|
500 Hz
|
450 Hz
|
1.5 kHz
|
2.0 kHz
|
Plot
Spec
|
|
526-8694-010
|
2.5 kHz
|
2.4 kHz
|
5.0 kHz
|
5.2 kHz
|
Plot
Spec
|
|
526-8695-010
|
5.7 kHz
|
5.5 kHz
|
10 kHz
|
11 kHz
|
Plot
Spec
|
|
526-8734-010
|
7 kHz
|
6.7 kHz
|
13 kHz
|
14 kHz
|
Plot
Spec
|
|
526-8735-010
|
10 kHz
|
9.5 kHz
|
17 kHz
|
18 kHz
|
Plot
Spec
|
The performance characteristics listed above are typical for the filters shown in the attenuation versus frequency curves shown by clicking
"Plot". The low ripple and low frequency shift values can be maintained over a temperature range of -35°C to +85°C. Predicted
frequency shift due to aging is less than 30 Hz over the lifetime of the filter.
|
