Re: [Elecraft] Sherwood receiver test on KX3

2012-08-15 Thread Ignacy
Don't forget that KX3 is QRP radio for portable operation. I tried hard to hear an image in KX3, and could not. Ignacy -- View this message in context: http://elecraft.365791.n2.nabble.com/Sherwood-receiver-test-on-KX3-tp7561045p7561092.html Sent from the Elecraft mailing list archive at Nabbl

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-15 Thread webrehm
It appears that the kx3 does not have dynamic image rejection, rather a one time calibration for image rejection. Has there been any talk of the KX3 implementing dynamic image rejection? Perhaps a future SW revision where the image rejection goes to > 90 dB. The Flex products implemented dynamic i

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Matt Maguire
Yes, if you are running a panadapter fed from the KX3 RX I/Q output, and you enable 8kHz shift, then all the signals are shifted up on the panadapter display by 8kHz. Further, if you enable dual watch, then the main signal from VFO A remains at centre frequency, and VFO B is plus or minus 15 kH

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Rich Heineck
If operating CW, another approach that could be used to avoid a strong signal in the opposite sideband is to hold the MODE button to go into CW REV. Rich AC7MA On 8/14/2012 1:47 PM, webrehm wrote: > The Sherwood test of the KX3 says this in the notes for the superscript V > "At 1 kHz performa

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread webrehm
So if you are running an panadapter and turn on RX shift then what happens to the panadapter display? Are the frequencies shifted on the display by 8 KHz? The Sherwood data would indicate to me that using the 8 KHz shift is a good thing to do all the time if you do not have the roofing filter and s

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Matt Maguire
Thanks Don. I was distracted by Matt Z's comments, and forgot to treat the original question :-) 73, Matt VK2ACL On 15/08/2012, at 8:12 AM, Don Wilhelm wrote: > Let me try to help a bit. > On the roofing filter/8 kHz shift, you have the cart before the horse. > The 8 kHz shift requires that

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Don Wilhelm
Let me try to help a bit. On the roofing filter/8 kHz shift, you have the cart before the horse. The 8 kHz shift requires that the roofing filter be bypassed. There are other cases where the roofing filter may be bypassed without the 8 kHz shift. For instance Dual Watch being active. There i

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Matthew Zilmer
d reficere -Original Message- From: Matt Maguire [mailto:vk2...@gmail.com] Sent: Tuesday, August 14, 2012 2:50 PM To: Matthew Zilmer Cc: webrehm; elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood receiver test on KX3 Hi Matt, I thought that the "RX SHFT" menu item was what set

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Matt Maguire
om: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of webrehm > Sent: Tuesday, August 14, 2012 1:47 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] Sherwood receiver test on KX3 > > The Sherwood test of the KX3 says this in the notes for th

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Lyle Johnson
Also, see the "RX SHFT" menu entry. 73, Lyle KK7P > The 8 KHz IF mode is called DUAL WATCH or DUAL RX. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:

Re: [Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread Matthew Zilmer
craft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of webrehm Sent: Tuesday, August 14, 2012 1:47 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Sherwood receiver test on KX3 The Sherwood test of the KX3 says this in the notes for the superscript V "At 1

[Elecraft] Sherwood receiver test on KX3

2012-08-14 Thread webrehm
The Sherwood test of the KX3 says this in the notes for the superscript V "At 1 kHz performance is opposite sideband rejection limited. On CW consider switching to 8-kHz IF. Note: Roofing filter disabled in this mode." I do not see anything in the manual about the 8 Khz IF mode. It is my understand