[Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread DOUGLAS ZWIEBEL
Hi... The following request for information is not specific to the K3 (or even to Elecraft). Please craft your response to be generic. Despite being an active ham/contester for over 40 continuous years (but not being an ee), I just do not understand how a "preamp" works. It is not a "smart" devi

[Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread Ken Kopp
Hi Ron, This was an -excellent- layman's language explanation about the functioning of front ends and pre-amps. Tell the boss you need an "atta-boy" and a raise! Merry Christmas! Ken Kopp - K0PP elecraftcov...@rfwave.net ___ Elecraft mailing list

RE: [Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread Darwin, Keith
craft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Monday, December 15, 2008 11:15 AM To: Elecraft Reflector Subject: [Elecraft] K3 sensitivity + preamp: looking for wisdom Hi... The following request for information is not specific to the K3 (or even to Elecraft). Please craft your resp

Re: [Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread WILLIS COOKE
sometimes, harmful at others. I hope this helps. Willis 'Cookie' Cooke K5EWJ --- On Mon, 12/15/08, DOUGLAS ZWIEBEL wrote: > From: DOUGLAS ZWIEBEL > Subject: [Elecraft] K3 sensitivity + preamp: looking for wisdom > To: "Elecraft Reflector" > Date: Monday, D

Re: [Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread Julian, G4ILO
DOUGLAS ZWIEBEL wrote: > > Hi... > > The following request for information is not specific to the K3 (or > even to Elecraft). Please craft your response to be generic. > > Despite being an active ham/contester for over 40 continuous years > (but not being an ee), I just do not understand how

RE: [Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread Ron D'Eau Claire
Keith is quite right. All receivers generate internal noise in their amplifiers. The goal is to make sure this internal noise does not compete with the received signal so the only thing that limits the ability to hear weak signals is the unavoidable atmospheric or "antenna noise". Of course, the

RE: [Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread Evert Bakker (PA2KW)
7:15 To: Elecraft Reflector Subject: [Elecraft] K3 sensitivity + preamp: looking for wisdom Hi... The following request for information is not specific to the K3 (or even to Elecraft). Please craft your response to be generic. Despite being an active ham/contester for over 40 continuous years (

Re: [Elecraft] K3 sensitivity + preamp: looking for wisdom

2008-12-15 Thread Milt, N5IA
DOUGLAS ZWIEBEL'" ; "'Elecraft Reflector'" Sent: Monday, December 15, 2008 11:14 AM Subject: RE: [Elecraft] K3 sensitivity + preamp: looking for wisdom Keith is quite right. All receivers generate internal noise in their amplifiers. The goal is to make sure this int