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In my opinion, the best study websites available with plenty of practice exams. No fee required, no membership required. Use them as much as you need to. My wife and I both used these two sites exclusively to study and practice test for all levels of our amateur license, from Technician to Extra...

Barkett Electronics https://stores.goldeneagleradios.com/ranger-rci2995-dx-amp-board-assembly-kit-galaxy-dx94hp-no-warranty/

Don't have any "pills" in any of my amplifiers ........ I use "transistors", different types .......

You're on your own with your bridge .......

I have several Texas Star DX500-HDV amplifiers. All were purchased new by me over the last few years. I have upgraded the power wires and installed new, from my personal stock, original Toshiba 2SC2879 transistors in all of them. $1,100 (original Toshiba transistors are $200+ each if you can...

8.5' long for each wire, put up in an inverted "V" formation with a minimum 90* included angle at the coax connector.......

Looking forward to seeing photos.......

Looks very good also. The 20' I-beam I used is what I already had on hand out here on the ranch. Having 15' above ground just reduces the load on the winch, and the stress on the tower. What you are doing will probably work just as good as what I did. But how are you going to tilt the tower...

Tilted over, I haven't taken photos yet, but I have also installed a tilt plate at the top of the mast and the antenna stays in the horizontal position now all the way down to the ground. I use these two antennas for 10 meters and 11 meters. I also have an OCF wire off the side of the tower at...

the I-beam is 20' long, with 5' in the concrete, and 15' up the side of the tower.

It doesn't require a 50 amp power supply to operate, but performance would likely be limited if using less than a 70 amp power supply.

Well, it may have been designed for 13.8 volts, but it is a mobile amplifier. Very rarely does a mobile alternator electrical system operate at 13.8v. Most will operate at 14v to 14.5v...... So operating this amplifier at 14v on a power supply is perfectly fine and it will last for years and...

I know this post is a little old, BUT.......... I have one of these ALS-500M amplifiers to use in mobile use for all bands. Manufacture date sticker inside is 02/2022 ....... Quality control sucks. It would not key when everything was connected. I had to troubleshoot the amplifier using...

It's a mobile amplifier. Good to run as 144inBama suggested above. Run it at 14 volts and it will run for years.

And that also gets back to my suggestion of checking the bias resistance and bias voltage as the first step. The issue would have shown up then at the beginning, and then followup with testing the transistors. Would have saved the OP a bunch of time. Bias checks is always my first step in...

Yessir, you would be correct, but notice that I said a proper license class does allow full legal power output of 1500 watts on 10 meter band. (General and Extra class)

Yes, but it's not illegal on 10 meters with proper license. and this antenna performs well on 10 meters.

Check the bias resistance first ......... Then check the bias voltage.........very quickly....... These are the two easiest things to do FIRST without changing out components and guessing.......

Check the bias resistance of the transistors first. Of course, with all DC power removed/unplugged from amplifier.

Well, nomad is right, if the amplifier heat sink is getting / staying hot, then that means the heat is being generated by the RF power transistors. It would be prudent to check the transistors bias resistance first, then do a quick check of the transistors bias voltage.