02-15-2012, 01:06 PM
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Join Date: Dec 2008
Location: Silicon Valley CA, Storm Lake IA
No, the 'ERF' marked devices are mfd exclusively by RF Limited in the Far East. They are specifically engineered for RF use. They also make the ERF-7530 that is used in the RFX-75 add-on unit.
In past versions of this radio, they have gone from the dual 2SC1969 output transistors to the dual ERF 2030 MOSFET units made by EKL. Which - is a division of RF Limited - by the way. With the addition of the PowerBand RFX-75 and the elimination of the 2030 finals to the ERF-7530 MOSFET, the power on AM is a conservative 90 watts. On SSB mode, it will put out 70 watts. And on FM mode, it will do 20 watts.
You are quite right about the 'IRF' in one respect.
It is true that the 'IRF' devices can either work or not for RF applications and some were not intended to work at all.
BASE: Kenwood TS-2000, GAP Titan DX, Diamond X50A, Sirio SY27-4, and IMAX 2000.
MOBILE: Galaxy DX99V w/RF Limited CR-577 mic, Sirio Z-180. Yaesu FT-8800R & Diamond NR-770.
Last edited by Robb; 02-15-2012 at 04:11 PM.