ALS-500M Would YOU use one in the shack???

Mudfoot · Feb 13, 2020

I already have power supply to run it. I'd prefer to buy an ALS-600 with linear supply, but that would cost me over $1k more over the 500M. The radio interface cable for auto band switching would be berries.

Do you think the 500M running 12 volts is to dirty for base operation?

543_Dallas · Feb 13, 2020

I would not use the 500 without puresignal wrapped around it..maybe the same for the 600. Im sure you've looked at the transistor spec sheets. -24db at 100 watts for the 2879 leaves a lot to be desired. The mrf 150s in the ALS 600 aren't that impressive either at -32 db. If you buy the 500 new will it come with Toshiba transistors?

Ameritron doesn't give IMD specs for either amplifier in their respective manuals. They do with their tube amps. Most of them are "-35 db or better".

I'm not sold on the solid state stuff yet. The guys running them seem to be wider on the waterfall.

Captain Kilowatt · Feb 13, 2020

Even W8JI cautions against running that amp from abase station location and he should know. He designed it for Ameritron.

2315 Robert · Feb 13, 2020

Mudfoot, I respect everything already said here. I have one and have used as a base. Been hitting it with 70 watts that puts me close to 375w out(narrowish). I have really just started with HF and has really helped. Just checking into nets and stuff. If conditions were better the width would be a no go. Until the bands improve I will continue to use it. Hopefully by then I may have something much cleaner.

seedkey · Feb 13, 2020

70 watts into it? Thats excessive , isnt it ?

Captain Kilowatt · Feb 13, 2020

seedkey said:
70 watts into it? Thats excessive , isnt it ?

Not really. The input has swamping resistors to reduce drive power. Ameritron simply specifies "less than 100 watts drive for full output".

gamegetter · Feb 13, 2020

if i could find one for $50, I would run it...lol
note he put over 100 watts into it.
i know i know the whistle

Mudfoot · Feb 13, 2020

I rarely find those deals.

gamegetter · Feb 13, 2020

gamegetter · Feb 13, 2020

volt it to 14v and can add 10 and 12 meters

Mudfoot · Feb 13, 2020

I saw that video. I figured 'ol Dave would get flamed so much it'd burn his house down.

gamegetter · Feb 13, 2020

lol, it's all good and fun. looks like the sweet spot on daves amp occurs when driven with 62 watts.

again dave got a good deal on his so, off to some ham fests...

2315 Robert · Feb 14, 2020

Gamegetter: BORN TO DX, FORCED TO WORK. So true.

2315 Robert · Feb 14, 2020

Mudfoot said:
I saw that video. I figured 'ol Dave would get flamed so much it'd burn his house down.

Affirm. In the one I picked up I had to use some silver bearing solder to reattach a solid wire connection to that power interesting plug. It was used mobile all it's life and had suffered from some vibration.

Mark Malcomb · Feb 24, 2020

Here is an ok power supply to run your amp. A bit pricey but live large..

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ALS-500M Would YOU use one in the shack???

Mudfoot

Elmer

543_Dallas

Sr. Member

Captain Kilowatt

Professional Amateur

2315 Robert

Grateful

seedkey

Active Member

Captain Kilowatt

Professional Amateur

gamegetter

Well-Known Member

Mudfoot

Elmer

gamegetter

Well-Known Member

gamegetter

Well-Known Member

Mudfoot

Elmer

gamegetter

Well-Known Member

2315 Robert

Grateful

2315 Robert

Grateful

Mark Malcomb

Well-Known Member

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