Topband: Hi Z amplifiers for 160m

Jim Brown jim at audiosystemsgroup.com
Wed Mar 11 13:34:52 EDT 2020


On 3/11/2020 6:28 AM, GEORGE WALLNER wrote:
> Assuming a trans-impedance amplifier, "unity gain" is enough (with 
> reasonable size elements). Noise and IP3 are far more important. 
> Lightning and surge immunity are also important. Also, isolate the amp 
> from common mode noise travelling on the feed-line. Filter the power 
> supply well. Use an F connector (a high quality one that can be torqued.)

Agreed, but I would add power on the coax.

73, Jim K9YC


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