19 Jan 2011

FT817 lowest power setting at 500mW

Do you know, I've only just realised something about my FT817 having owned it for almost 10 years: as someone pointed out to me, the lowest setting on the FT817 is always 500mW whether on an external supply or internal batteries. For some reason I had believed "1 dash" on the display was 500mW on batteries and 1W on a mains PSU. I just checked and it really is 500mW out.

So, my recent WSPR DX spots with 10mW and 1mW were actually at 5mW and 500uW!


Paul Stam PAØK said...

Hello Roger, yes I knew, I do use a 10 db attenuator at the lowest setting of 500 mW with my FT817. Makes your DX more special. 73 Paul

Anonymous said...

Hello Roger and Paul,

I often use the lowest possible power in each QSO.
I use the following values on the QSL-cards: 5W, 2.5W, 980 mW and 450 mW.
So with the FT-817 on 500 mW with 10 db attenuation, the power to the antenna will be 45 mW.

The values have been measured with professional equipment, during a visit to Mischa PA1OKZ.
These values include the loss in my small SWR meter and cables of the attenuator. Then at 0 dB.
(Actually the power is even lower.) hi
But then I'am sure that the real power will be less.

There is also a table of the FT-817 on the PA1B attenuator page.

73, Bert PA1B