The Tokyo High power HL2K? with 3-500s was also such a amp. It had proper cooling(fully pressurised) On 240 VAC it could easily hit 2KW pep even though it was rated for 1.2KW PEP. Much like the TL922 which can? easily hit 1.5KW pep on 20 metres and below. The Tokyo high power HL2K was a popular RTTY? contest amp because it would not break down or melt parts and pins because of proper cooling. I think Amp Supply also had a heavy duty 3-500Z 3 or 4 holer, I cant remember.?
