Before I get flamed about "illegal power" I'm looking to build a amp for running 160 and 75 meter amplitude modulation at legal limit (350-375 carrier and 1500watts at 100% modulation).
I have no desire nor need to run illegal power I just want to build a bulletproof amplifier that won't break a sweat running a demanding mode like AM at legal limit.
Also I cannot justify the $$$ for a 4KV at 2 amps CCS transformer capable of running the tube at its full abilities so it would only get a 4KV at .75 or 1 amp CCS xfmr in its power supply.
So with all that said I was looking at all the tube specs and prices and came on the 3CX3000A7. It has a 4,000 watts of plate and 225 watts of grid dissipation so running at legal limit the tube would leave ALLOT of headroom so it would stay linear and keep distortion down.
Now for the questions.
With the cost of a import 3CX3000 being around $700 or a genuine Eimac being $1200 why are they not as popular as a the 8877/1500A7 ??
I know the 8877 has about 3dB more gain than a 3CX3000 (15dB and 11dB respectively) but aside from that why don't more amp makers just use the 3CX3000 but with a power supply only big enough to run it at legal limit so they can get FCC approval?
I do realize that the 3000 needs about 1 KV more than the 8877 and uses 400 watts for the filament. But is there any stability issues or other reason I've over looked as to why the 3000 isn't used more ??