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291 [2007/05/24 03:41] n5na |
291 [2010/10/05 14:15] n5na |
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| ====== Antenna Tuner Model 291 ====== | ====== Antenna Tuner Model 291 ====== | ||
| - | {{291.jpg?150|}}{{291rear.jpg?170|}}{{291inside.jpg?100|}} | + | {{291.jpg?150|}}{{291rear.jpg?170|}}{{291inside.jpg?150|}} |
| ===== Description ===== | ===== Description ===== | ||
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| The two capacitors used in the 291 are 1000 volt 50-250 pF variables connected in series with a 47 tap rotary inductor (0.5-24 uh) shunted to ground. This tuner can be used with a single 50 ohm coax input and output, or has a wing-nut lug for use with end-fed longwire antennas. Extra capacitance can be added externally to the back panel for increasing the matching range if desired. | The two capacitors used in the 291 are 1000 volt 50-250 pF variables connected in series with a 47 tap rotary inductor (0.5-24 uh) shunted to ground. This tuner can be used with a single 50 ohm coax input and output, or has a wing-nut lug for use with end-fed longwire antennas. Extra capacitance can be added externally to the back panel for increasing the matching range if desired. | ||
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| + | ===== Earlier Version ===== | ||
| + | {{:291alt.jpg?150|}} | ||
| ===== Related Links ===== | ===== Related Links ===== | ||
