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564_40m [2015/08/28 12:11] n1eu |
564_40m [2015/08/28 13:29] n1eu |
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| The 40 Meter Crystal is Y4. Sorry but I didn't go deep | The 40 Meter Crystal is Y4. Sorry but I didn't go deep | ||
| enough to get the frequency. You could have a bad crystal but here is what | enough to get the frequency. You could have a bad crystal but here is what | ||
| - | I have been running into lately. | + | I have been running into lately.\\ |
| - | - An Omni 6 opt 3 that would not do a | + | 1. An Omni 6 opt 3 that would not do a |
| - | proper CW transmit offset | + | proper CW transmit offset\\ |
| - | - Another Omni 6 Plus which 30 Meters would fall out after a few minutes of operation. | + | 2. Another Omni 6 Plus which 30 Meters would fall out after a few minutes of operation\\ |
| - | - Grady/AD4GB, had an Omni 6 which had no 20 Meters. | + | 3. Grady/AD4GB, had an Omni 6 which had no 20 Meters. \\ |
| - | - My Paragon, a bit different because this was a problem with the Low Pass Filter Board. | + | 4. My Paragon, a bit different because this was a problem with the Low Pass Filter Board. \\ |
| And the list goes on and on where missing bands have been concerned. Each | And the list goes on and on where missing bands have been concerned. Each | ||
| of these problems was a PIN Diode. In your case it is D12 on the OSC-Low | of these problems was a PIN Diode. In your case it is D12 on the OSC-Low | ||
| - | Mixer Board. If you look at page 6-14 of the Manual or page 52 of 132 of | + | Mixer Board. If you look at page 6-14 of the Manual, or page 52 of 132 of |
| - | the .PDF on your computer. You will see Connector 82. ( osc-low mixer board | + | the .PDF on your computer, you will see Connector 82 ( osc-low mixer board). The band switching is done by applying a positive voltage to the proper |
| - | ) The band switching is done by applying a positive voltage to the proper | + | diode to activate the proper crystal.\\ |
| - | diode to activate the proper crystal. | + | \\ |
| Sorry but I don't have an Omni 5 for reference but if you place the rig on 160 meters, one end of the connector | Sorry but I don't have an Omni 5 for reference but if you place the rig on 160 meters, one end of the connector | ||
| will have a positive voltage. Switching to 80 meters the second pin in will | will have a positive voltage. Switching to 80 meters the second pin in will | ||
