[Moon-net] New Device maybe for 1296 amp ?

[Chris Bartram]

The limitation with so-called 'long-pulse' radar transistors used as CW 
devices is usually die temperature. While it might be possible to get 150 - 
200W CW from a 800W 10% duty cycle pulse transistor while maintaining a 
sensible junction/channel temperature, to do it reliably would involve taking 
the cap off of the device and measuring it, preferably with a suitable 
scanning infra-red themometer.

I wouldn't bother to try unless I had a big supply of devices at zero cost!

There are devices - both bipolar and (LDOMOS) FET - which will give 100W+ CW 
at 1296. These are engineered to operate under CW conditions, and with 
attention given to proper cooling - something neglected in many amateur 
designs - will be a lot more reliable than a big long-pulse device operated 
under an uncertain thermal regime.

Vy 73

Chris
GW4DGU