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| + | ====== 580 Bias Adjustment to Finals ====== | ||
| + | **From Ten-Tec Reflector August 27, 1996** | ||
| + | Here is the proper procedure for final bias adjustment for the Delta 580 (not outlined in the operating manual). | ||
| + | |||
| + | On the bias board, turn R23 down to zero. Locate final amplifier board. Unsolder the large red B+ wire from the board. Unplug connector #57 turn it 90 degrees, replug in so only the blue wire from the connector is connected, leaving an open pin. Place an ammeter between the red B+ wire and this open pin. Adjust R17 on final amplifier board for 50 to 60 milliamps. Replug connector 57 correctly. Place ammeter between the red B+ wire and the spot it was unsoldered from. Adjust R23 on bias board for 500 milliamps. Reattach red B+ wire. | ||
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| + | If any of this is unclear, please contact Garland Jenkins in Ten-Tec service at (423) 428-0364 M-F 8-4 Eastern. | ||
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| + | 73, Scott Robbins KY2P, Ten-Tec | ||
