[Amps] 4Z4RB amplifiers

[Bill Turner]

4Z4RB has a number of SS amp boards for sale on eBay at attractive 
prices, but data on them is pretty scant. Nothing of bandwidth, IMD or 
duty cycle for example.

Here's one:

http://www.ebay.com/itm/2KW-VERY-HIGH-POWER-2x-LDMOS-BOARD-LINEAR-AMPLIFIER-/161284955586

and there are many others.

Does anyone have any experience with these?  With no data I am pretty 
leery.

Thanks in advance,

73, Bill W6WRT
dezrat at outlook.com