This is an old revision of the document!
Model 208 CW Filter
Description
The Model 208 CW Filter is an accessory audio bandpass filter intended for use with the Ten-Tec Argonaut transceiver. It consists of the Model 245 printed ciruit assembly mounted in a small enclosure, along with a three position selector switch and attached cable. The 208 plugs directly into the Argonaut Model 509 ACCESSORIES socket, whereas a slight modification is necessary when using the filter with the older Model 505 Argonaut. Service Note SN-6-505 details the modifications.
Specifications
- Bandwidth: 150 Hz @ -3 dB, 1.45 kHz @ -60 dB in CW-1 position; 260 Hz @ -3 dB, 2.8 kHz @ -20 dB in CW-2 position
- Shape Factor: 7.2 to 1 @ 6/60 dB points
- Center Frequency: 750 Hz
- Input Impedance: 220 k
- Output Impedance: Less than 10 ohms
- Insertion Gain: 2.5 dB
- Semiconductors: 2 ICs
- Powered by Transceiver - +12 VDC @ 2 mA