marklhamm...@gmail.com
To: i8cvs domenico.i8...@tin.it; Paul Delaney - K6HR
paul.hamra...@verizon.net; Amsat - BBs amsat-bb@amsat.org
Sent: Friday, March 11, 2011 12:11 AM
Subject: Re: [amsat-bb] Re: IC-821H Frontend Overload?
I don't think this statement is correct: Since the NF of a
AR SP432VDA
Hi Paul, K6HR
The SSB and CW sensitivity of an IC 821H in 70 cm is less than 0.11uV
for a Signal to Noise ratio S/N= 10 dB
Converting the above data into Noise Figure NF in dB we get:
-6 2
( Vin x 10) x 20
Very good explanation
Sent from my iPhone
Andrew Rich
On 11/03/2011, at 4:01, i8cvs domenico.i8...@tin.it wrote:
Hi Paul, K6HR
The SSB and CW sensitivity of an IC 821H in 70 cm is less than 0.11uV
for a Signal to Noise ratio S/N= 10 dB
Converting the above data into Noise Figure NF in
I don't think this statement is correct:
Since the NF of a AR SP432VDA is 0.55 dB and the gain is 15 dB if the coax...
The 2meter VDA has a noise figure great than 1, stated to be about 1.1 dB NF;
the difference is more than just gain.
Thus the reason I suggest that he get the 2 meter VDG
It's all about noise figureI say get the AR2 SP432VDG 24db!If
the front end is too hot you can use crummy coax to attenuate the
signal ;)
Does the 821H have a preamp that you could turn off if necessary?
Probably won't be necessary, but just in case...
Mark N8MH
On Wed, Mar 9, 2011 at
-bb-boun...@amsat.org] On
Behalf Of Mark L. Hammond
Sent: Wednesday, March 09, 2011 1:28 PM
To: Paul Delaney - K6HR
Cc: amsat-bb@amsat.org
Subject: [amsat-bb] Re: IC-821H Frontend Overload?
It's all about noise figureI say get the AR2 SP432VDG 24db!If
the front end is too hot you can use
