The Ameritron AL-811 10 meter mod is simple to do if you have just a little mechanical ability.
The bands where more drive was needed were 75/80 meters and 10 meters. My issue on 10 meters was easily resolved by adjusting the spacing between turns in the 10 meter filter. One of the inductors looked like it had been squashed and several turns at one end might even have been shorted. Ameritron part # 208-6161 (160 pF 1000V.
- This is the manuals page for Ameritron. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. If you have some stuff that not is listed here you can donate this by contact mods.dk. Note that there is a limit to the number of files you can download.
- Ameritron 10 Meter Mods Pdf File Cool, efficient operation is provided by a forced- air system with tube chimney, using a commercial grade die- cast ball bearing blower for maximum tube life. The tube is further protected by time delay starting and automatic over- current shutoff to remove drive power if the amplifier is mis- tuned.
Now that the FCC have rolled back or removed the ten meter ban on amplifiers. Companies are selling them so it should be safe to share this.
Ameritron AL-811 10 Meter Mod
Ameritron 10 Meter Mods Pdf Writer Download
Modifying this amplifier for 10/12 meters, this use to require sending a copy of your license to Ameritron. Use this link Ameritron requests. Then they would send you directions. I recommend you do that now, especially if it is a new amp. If you have not bought it yet you may want to ask if they can do it for you. Their directions will not ruin the warranty.
- Take off the window on the bake panel and see if you can see the green wire. If not then take out the cover screws and remove the top. Locate the rear panel PC board and the AUX tuning coil from the rear panel.
- Looking down along the rear you should see the green wire connected from the PC board to the AUX tuned input coil as shown in the diagram. Cut the green wire and make sure it will not touch or go to ground.
- Replace the window or cover and screws.
Ameritron 10 Meter Mods Pdf Writer Pdf
In some cases a high SWR may occur at the amplifier input. You will have to adjust the AUX tuned-input circuit slug with a plastic 0.1” hex T.V. tuning tool.
Put the tuning tool in place, tune the amplifier and tune for the lowest SWR while transmitting. Ameritron amps usually come pre-set for 10m (AUX tuning).
You may use 12 meters more than 10 and want to tune it for better performance. Re-tune the slug for lowest SWR in the middle of the 12 meter band. Or you could compromise the match, setting it for halfway between the 10m dip and the 12m dip. This will make it work on on both bands.
Ameritron 10 Meter Mods Pdf Writer Software
Watch the grid drive while doing this with the 811A tubes. They do not like to be over driven over driven.
Ameritron 10 Meter Mods Pdf Writer Version
This easy Ameritron AL-811 10 meter mod will have you talking on 10 and 12 meters soon, Happy DXing.