John S. Dyson wrote...

The SiGe transistors are also not very expensive. A part that
works well with reasonably low distortion and reasonably low
noise figure at 600MHz would be significantly less than $1.00.

Examples of low-cost high-performance (30GHz at 10mA) SiGe
transistors would be Infineon's BFP620 (82 cents at DigiKey)
http://www.infineon.com/cgi/ecrm.dll....jsp?oid=26182
and Philips' BFU510 and BFU540
http://www.semiconductors.philips.com/pip/BFU510.html
http://www.semiconductors.philips.com/pip/BFU540.html

The Philips transistors look good, but I don't know where to
get them. Mouser stocks a set of CEL's nice SiGe transistors,
http://www.mouser.com/?handler=produ...riteria =SiGe

Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)