To be honest with you guy... stay away from it.
i Know 4 owner of LA-4000, 3 got home for major repair + modification.? The last one i dont know i never spoke with the owner but i bet is power board will fry very soon.
YU Lang the owner of AMPTEC, is not listen at all...not very helpfull ...he not came back to my email as i told him all the bad design he do on this piece of junk :)
The way he keep the amp running using power divider on 240 volt is getting hot very fast and blow very quick.
Glitch resistor value is to low and not limit often current when flashover occur...the board trace goes in smoke each time.
IMD is ridiculous...even at 1500W.
Screen voltage is well regulated so i am thinking IMD is from tube.? 4CX1500B swap will be possible but very expensive ...? much more better amp is around and make here with full service support.
Dont waste a buck on this.
This is my opinion..
Guillaume VA2NA
