xpyttl napisa³(a):
Feed the two voltages into a microcontroller that does
the math and operates the display (digital of course). Analog isn't going
to be so popular because you not only need a meter (generally harder to get
and expensive these days), but you will need some custom meter face, and
what it needs to look like won't be all that obvious.

I was thinkink about it, but i want to do it "as much analogue as
possible" ;-)

Thank you for response

MAc
sp9mrn

MAc wrote:

I was thinkink about it, but i want to do it "as much analogue as
possible" ;-)

You'll get some good ideas from "The Tandem Match - An Accurate
Directional Wattmeter" by John Grebenkemper, KA3BLO, in Jan. 1987 QST.
See also corrections to the article in Jan. 1988 Technical Correspondence.

Roy Lewallen, W7EL

Roy Lewallen napisał(a):

You'll get some good ideas from "The Tandem Match - An Accurate
Directional Wattmeter" by John Grebenkemper, KA3BLO, in Jan. 1987 QST.
See also corrections to the article in Jan. 1988 Technical Correspondence.


Thank You, Roy - I did't know that article. Im just reading it and
trying to understand :-)

73
MAc
sp9mrn

On Thu, 09 Nov 2006 15:00:25 -0800, Roy Lewallen
wrote:

MAc wrote:

I was thinkink about it, but i want to do it "as much analogue as
possible" ;-)

You'll get some good ideas from "The Tandem Match - An Accurate
Directional Wattmeter" by John Grebenkemper, KA3BLO, in Jan. 1987 QST.
See also corrections to the article in Jan. 1988 Technical Correspondence.

Also he

http://n2pk.com/RLPmtr/RLPv1c.pdf

Wes Stewart napisał(a):


http://n2pk.com/RLPmtr/RLPv1c.pdf


N2PK wrote ~~"...measure return loss instead of swr..."
I think, its the best way.
I suppose (only for "comparisom" purposes) I can make a second scale on
meter face which will show swr (N2pk article figure2)

MAc

So, the way is 2x AD8310 +dual opamp and analog meter.
Will report the result. Now I'm waiting for parts.

Thanks to all

73
MAc
sp9mrn