sensitivity or not sensitivity..............
How many don't have see that?
https://www.youtube.com/watch?v=q2v4Q69bs8g
?73 de Giovanni (i7iwn)
----Messaggio originale----
Da: "Michael Hagen" <motdog@...>
Data: 11/07/2017 15.15
A: <[email protected]>
Ogg: Re: [BITX20] BITX40 Sensitivity
If you got real 50 Ohms, the Attenuator is
usually 50 Ohms in dB (Power).? You can calculated it.? But you
have to know what is coming out of the generator.? You can
convert between power and uV with P = E squared/R(that is 50
ohms).? There are also nice charts you can search for, or make
your own in Excel.
Measure your output of the generator into the
Attenuator with X10 probe and highest freq scope you can get.?
But a bigger signal ahead of the Attenuator are a
lot easy to measure.? I use my attenuator all the time, maybe 80
dB cranked in?
I can't recommend the K5BCQ more, it is cheap and
works great.? You can make you own real easy.? 1W mox resistors
from Mouser work fine.
Make some 20 dB, 6 and 3 stages?
Mike, WA6ISP
On 7/11/2017 4:25 AM, C¨¦sar EA3IAV
wrote:
But... If I use an attenuator that is "analog"... How
am I going to know the amount of microvolts that I am iinjecting
into the BITX?
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
