[Elecraft] OT: modifying your amp for lower drive requirement

[Scott Ellington]

Of course, 20 dB of gain is not legal in the US, at least for commercial amplifiers, so it makes sense that Ameritron would use an attenuator, as it also saves them the cost of a matching transformer.  

Scott  K9MA





On Dec 21, 2010, at 12:08 PM, k.igor at comcast.net wrote:

> This is exactly right. The MRF150 MOSFETs used in ALS600 are rated at 20dB. I know people who homebrewed similar amplifier without series resistor and have full 20dB of gain - no problem whatsoever, stable like a rock. 

Scott Ellington
Madison, Wisconsin
USA