[Elecraft] Export Model..a brief history

[r miles]

In the 1960s Henry & others marketed amps  for other than amateur use. They were called ' export models'. For military, government civilian & other uses. Most would easily reach amateur limits for domestic use. The 'export models' usually had a heavier plate transformer. Some times a larger cooling chimney. The  same amperage but 500v or more  higher out. Using the same amp but with the export model  xfmr could result in 500 or a 1000 more watts output.A friend was stationed on Deigo Garcia in the Indian Ocean. The ham shack ran such an export model amp. They used it  for hamming & MARS work.  He said if he LIGHTLY drove this amp  it put out 3KW. Another friend bought a used amp  with the 'export model' label. He had to really drive it lightly. He set the HyGain balun on his TH6 on fire! Supposed to be a 5 KW balun. The bigger Alpha  had 3 holes cut in the chassis. USA  ones were sold with 2 tubes but I've heard guys say they were running a full 3 holer. You  fill in the blank. 
These companies need to sell to other markets besides amateur radio to stay in business.Henry amps used to be  used in hospitals for Diathermy. 
k9il