Loading ...
Sorry, an error occurred while loading the content.

Messages List

11093

File - Links.txt

Active AM Antenna With Twin Coil Ferrite by C. Crane Co. http://www.ccrane.com/antennas/am-antennas/ JLKolbÆs antenna links including the KRS AA-1 Active
loopantennas@yahoogroups.com
Jul 1, 2015
#11093
 
11094

File - UploadingFilesLinksPhotos.txt

If you have a link relevant to the group, please post it in the Links section. If you just put it in a message, it will get lost in the shuffle after a few
loopantennas@yahoogroups.com
Jul 1, 2015
#11094
 
11092

Re: Negative Noise Figure loop Amplifier

Mike, wrote on June 30. ... As for the NF measurement, this metrics is defined for Z=50 Ohm systems, and extending it to inductive impedance only creates
Andrew Ikin
Jun 30, 2015
#11092
 
11091

Re: Negative Noise Figure loop Amplifier

This makes sense to me. The gain and nf have to be measured consistently. Measuring the gain in a 50 ohm system and the noise with an inductor will definitely
kkyahoo
Jun 30, 2015
#11091
 
11090

Re: Negative Noise Figure loop Amplifier

Thankyou for your response Andrew. Alex
winston376
Jun 30, 2015
#11090
 
11089

Re: Negative Noise Figure loop Amplifier

Well, Andrew gave all the important info to reproduce the circuit. Details like biasing and power splitting can be easily figured out. I am surprised that FET
vbifyz
Jun 30, 2015
#11089
 
11088

Re: Negative Noise Figure loop Amplifier

I think NO as that is Andrew's bread and butter would you release something you spent a lot of time on and got perfected I think NOT p   On Monday, June 29,
Paul V Birke PEng
Jun 29, 2015
#11088
 
11087

Re: Negative Noise Figure loop Amplifier

Andrew, Very interesting circuit description. OIP3 results are quite good also. Is the electronic circuit available for review? Alex
winston376
Jun 29, 2015
#11087
 
11086
Andrew Ikin
Jun 28, 2015
#11086
 
11085

Re: Negative Noise Figure loop Amplifier

Andrew, Without knowing the exact circuit and components that you are using, it is difficult to be helpful but here are my comments.  As I understand what
Alex
Jun 27, 2015
#11085
 
11084

12 Volt Antenna Interface Wellbrook Ala 1530 - 1530 LF

Good evening all visitors to the group. I would plan to buy the Spare Loop Amplifer of Wellbrook 1530 Ala or Ala 1530LF, to make a loop amplified with lower
stargate438
Jun 27, 2015
#11084
 
11083

Re: Negative Noise Figure loop Amplifier

Perhaps you can help me understand what you are saying by indicating clearly how you calculated the NF? My understanding is that it is conventionally defined
gnuarm
Jun 26, 2015
#11083
 
11082

Re: Negative Noise Figure loop Amplifier

Rick N6RK wrote on June 26.
Andrew Ikin
Jun 26, 2015
#11082
 
11081

Re: Negative Noise Figure loop Amplifier

On 6/26/2015 11:55 AM, Andrew Ikin andrew.ikin@... ... JFET's, unless MOSFET's, DMOS, or epHEMT, have virtually no current noise, just the shot noise
Richard (Rick) Karlquist
Jun 26, 2015
#11081
 
11080

Re: Negative Noise Figure loop Amplifier

Tim, The amp. without the loop has a low dc resistance due to its input transformer. When the loop is disconnected the noise is at its lowest. Similar designs
Andrew Ikin
Jun 26, 2015
#11080
 
View First Topic Go to View Last Topic
Loading 1 - 15 of total 11,094 messages