There is a green wire that has to be removed from the band switch so that it will work on 10 thru 12 meters on the aux setting. After that's done it will work but the output on 10 - 12 meters will be lower than advertised.

Just nature of the beast. Which heathkit? Install Flash Player Without Admin Privileges Php there. I would rather have the sb220 just because it has 3-500z tubes.

ALS-600 ALS-500M 10 Meter Modification This kit contains a ten-meter board and this instruction sheet. First remove all power from the unit and unplug all cords including the power connector. The Ameritron AL-1500X is the export model and covers 160 through 10 meters. The AL-1500J is the export model for Japan and covers 160 through 10 meters. The AL-1500 uses a single 3CX1500A7/8877 tube in a class AB2 grounded grid circuit.

The sb1000 has a single 3-500z. Both were designed for the ssb user and the plate transformers will fail if you overwork them on AM. The 811 and 572b aren't much better than sweep tubes. Opinions may vary.

Most ham radios have an accessory output that will key the amplifier's relay when the radio's mike is keyed. The 2517 doesn't have this. There are two basic choices, IMHO. A footswitch plugged into the 'relay' jack will key the amplifier. Installing a relay in the radio works.

We hook the relay to the 'counter' jack on the back of the 2517. Driver Epson Tm-p2.01 Para Windows 7. A patch cord from that jack to the relay jack on the amplifier will now key it whenever the mike is keyed. We sold a board to install in this radio as a DIY for years. Supply is a bit low at the moment, so I'm sitting on them until we make another batch. Don't want to run out before we can get more of them made. That one is on the 'old nomad web pages' section of It's not a big deal to build yourself if you're comfortable wiring up parts on a perf board. Click to expand.Don't pass up a Drake L4b if you find one.

At first I thought you had a 100 watt radio but I confused the 2517 with something else. Most HF amps will need something in the 50 to 100 watt range. You may need a small driver but that's ok. If you turn the radio down and run a 2 pill driver under 100 watts you'll have a cleaner signal than if you tried to put hot rod parts in the radio. Oh.The relay that keys the ameritron is a 12 volt relay so no real safety precautions there.

The heathkit has over 100 volts on the relay so the keep that in mind when you're wiring up a switch to key one. I'm not sure about the voltage on the drake. Click to expand.You don't lose power by doing the modification. The amplifier just has less gain on 10 thru 12 meters. The green wire just shorts the input in the aux setting so it will not amplify the signal you put into it.