Re: RD16HHF1 power curve flattening...some


Jose Amador
 

I agree 10 watts is good enough. It does not make sense from the
linearity, thermal and energy management to just gain half a true S
unit. Also, to "nail" the output to what you can get on 10 m, and
attenuate the drive on the lower bands, a piece of cake. To me, the
next logical step is at least 6 to 10 dB (40 100 watts). That is a job
for an external amplifier. 30 years ago 10 watts was good enough.
Nowadays cheap SWPSU have increased the noise floor 30 dB. The goal
should be to strive to lower that level of EMI pollution. You can't
work'em if you can't hear'em!

On 4/1/18, Ashhar Farhan <farhanbox@...> wrote:
How much power should we put out? It is really your call. I personally
prefer 10 watts. There are multiple reasons. First, between 10 watts and
20 watts, the other side will feel almost no difference. Second, at 10
watts, I can still you batteries. Third, the heatsink is managable.
Fourth, I am technically in QRP land.

- f


On Sunday 01 April 2018 09:03 AM, Nik VK4PLN wrote:
Hi John,
BN42-202, but a 2:4 ratio winding giving 1:4 transformation. Runs cool
at 20+w with 330pf Mica cap. 220ohm feedback resistor.
Listening on 14.277 ?
73 Nick

Join BITX20@groups.io to automatically receive all group messages.