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| ====== Model 208 CW Filter ====== | ====== Model 208 CW Filter ====== | ||
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| + | {{208.jpg?150|}} | ||
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| ===== Description ===== | ===== 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. | + | 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. |
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| + | ===== 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 | ||
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| + | {{245_filter_curve.jpg?150|}} | ||
