[Amps] new high power transistor announced

[John Lyles]

NXP (Philips) combined Rf power products with Freescale Semiconductor 
(Motorola) a while back. Thankfully, product development has continued 
and NXP Semiconductors just announced a new LDMOS transistor, the 
MRF1K50H and MRF1K50N. This is another 50 volt part to supercede the 
1.25 kW MRFE6VP61K25H. We can already like the new parts numbering scheme!

The new part will develop 1500 watts of CW power, and is said to be a 
drop in for the other part, with only "slight retuning", whatever that 
means. A datasheet is not available yet, but preliminary info shows 23.5 
dB gain at 100 MHz, and suitability for linear power. The frequency 
range is 1.8 to 500 MHz, and 74% efficiency in class AB (!) in 
narrowband reference circuits. At 230 MHz, it is capable of 65:1 VSWR at 
all phases when pulsed for 1500 watts output, push pull (Gemini device).

NXP and Freescale have made significant inroads for products for ISM 
power, and ham radio amplifiers would be a natural product to use this 
device.
73
John
K5PRO