Re: [Elecraft] Soon to be an Elecraft(er)!

2016-10-07 Thread Brendon Whateley
Yes, thank you Matt for the explanation. I obviously didn't think it through as well as I should have. - Brendon KK6AYI On Fri, Oct 7, 2016 at 12:22 PM, Matt Maguire wrote: > Hi Brendon, > > In a way you are right, but consider this: the per-band nulling procedure > is to

[Elecraft] [K3] KIO3 wanted

2016-10-07 Thread Fore, John
I am looking for a set of KIO3 boards (no longer available from Elecraft since the introduction of the KIO3B) to replace a board in one of my K3s with a damaged component. Please email me if you have a set you would be willing part with, and include the serial number of the K3 they came from

Re: [Elecraft] Soon to be an Elecraft(er)!

2016-10-07 Thread Matt Maguire
Hi Brendon, In a way you are right, but consider this: the per-band nulling procedure is to compensate for amplitude and phase variations introduced in the LO and quad mixer which can be different from band to band. However, when you put a roofing filter in the signalling path, it will

Re: [Elecraft] Soon to be an Elecraft(er)!

2016-10-07 Thread Oliver Dröse
Brendon, it is per band and it makes a real difference! 73, Olli Contest, DX & radio projects: http://www.dh8bqa.de Am 07.10.2016 um 17:59 schrieb Brendon Whateley: Given my understanding of the roofing filter design in the KX3, I don't think there is any per-band adjustments to make. IIRC,

Re: [Elecraft] Soon to be an Elecraft(er)!

2016-10-07 Thread Brendon Whateley
Given my understanding of the roofing filter design in the KX3, I don't think there is any per-band adjustments to make. IIRC, the filter is an analog low-pass filter that operates after the direct down-conversion. If I'm wrong, then please set me straight. Especially because I'm considering

Re: [Elecraft] Soon to be an Elecraft(er)!

2016-10-07 Thread Matt Maguire
Does the factory do a full per-band calibration, or do they just calibrate on 20m and extrapolate? If the latter I'd suggest to do the full per-band calibration yourself even for a factory-fitted roofing filter, as it does make a difference (obviously back up your config first so you can