Re: [Elecraft] Elecraft receiver experience

2007-09-03 Thread N2EY
In a message dated 9/3/07 9:34:19 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: > Would I be right in assuming the more conversions, the > higher the phase noise, even if crystal oscillators are used? It's not that simple. A multiconversion rx with quiet oscillators can have less phase n

RE: [Elecraft] Elecraft receiver experience

2007-09-03 Thread Brett gazdzinski
Lyle, Thanks for the info. Would I be right in assuming the more conversions, the higher the phase noise, even if crystal oscillators are used? In the homebrew receivers, I used B+W coil stock, which I think has very high Q... Brett N2DTS > > Oscillators have phase noise. Properly designed -

Re: [Elecraft] Elecraft receiver experience

2007-09-03 Thread Lyle Johnson
Do tube circuits have phase noise? Do discrete components (solid state, transistors) in coil and cap VFO circuits have phase noise? Oscillators have phase noise. Properly designed -- with attention to this -- the phase noise can be managed and made small. Crystal oscillators are usually the

RE: [Elecraft] Elecraft receiver experience

2007-09-03 Thread Brett gazdzinski
Being a mostly tube guy, I have not read much about phase noise. Do tube circuits have phase noise? Do discrete components (solid state, transistors) in coil and cap VFO circuits have phase noise? What is the worst source of phase noise? What circuits have little or no phase noise? My ears are