Re: [Elecraft] MH-2 Mic
To ask the question another way ... Can the K3's mic connector be configured in the same manner as the K2's to suit different schemes? I didn't see this dealt with in the FAQ list. I have several Icom-configured mics ... including a Heil HS ... and my K2's set up for them. Obviously, I'd like to configure the K3 to accept them. 73! Ken Kopp - K0PP [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Elecraft Digest, Vol 37, Issue 6
For what its worth, I'm switching EVERY 12v cable/device I have to use APPs, including completely replacing the molex style connector on my FT-857, which has proven to be less than reliable after only 3yrs. On 3/5/07 09:03, [EMAIL PROTECTED] [EMAIL PROTECTED] sent: The rig comes with a mating cable that has properly installed APP connectors at one end. Note that APP (Anderson Power Pole) connectors are quite rugged, and we've never seen a failure in any of our products that use them. -- Either that wallpaper goes, or I do. - last words of Oscar Wild ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Elecraft Digest, Vol 37, Issue 6
WOW - even though I read about the RTTY PSK, I hadn't spotted that - the K3 must be the first radio to do this. I'm just learning Morse and not able to hold a QSO in CW yet, I've tried other decoders and find that don't read human sent Morse very well (as a friend says, they don't have fuzzy logic), so it will be interesting to see when mine arrives. But just to think about it and attempt it is fantastic :-) On 3/5/07 09:03, [EMAIL PROTECTED] [EMAIL PROTECTED] sent: We also have a CW decoder built in that will either copy and display the characters on the LCD, or tell you the code speed in WPM. -- If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Elecraft Digest, Vol 37, Issue 6
There appear to be a number of Kenwood connections described at http://homepage.ntlworld.com/rg4wpw/date.html i.e. MC-42S, MC-43 MC-47 have inner on 7 and shield on 1, but MC-44 shows it the other way around. I was going to wait until I got my K3, but would be nice to know asap if my unmodified Heil HM-10 will work without mod. On 3/5/07 09:03, [EMAIL PROTECTED] [EMAIL PROTECTED] sent: I have the impression that the K3 / MH-2 connectors are configured like Kenwood's. Is this correct? I have a nice Icom desk mic and a Heil HS that I use with my K2 and it would be nice to be able to use them on the K3. -- Children aren't happy without something to ignore, And that's what parents were created for. -Ogden Nash (1902-1971) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 mic
Reading some posts and being new to Elecraft gear (K3 will be my first), is there anything 'special' about Elecraft mic requirements? I have a Heil HM-10 dual element, will that 'just work' with the K3? -- Math Anxiety: an intense lifelong fear of two trains approaching each other at speeds of 60 and 80 MPH. -Rick Bayan ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Power supplies ..
Recent experience here suggests that finding a switcher that does NOT cause RFI and fan noise problems is a problem. I just went back to using a boat anchor industrial linear supply weighing in at around 40-50 lbs for that reason. Unfortunately it came with large terminal bolts, no PowerPole connectors ! But it works and there is no noisy fan and it will certainly run a K3 as well as a K2 and my Omni-V.9. MFJ offer a heavy 25 amp+ linear supply, but why oh why is it only 110 VAC input ? G3JAG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Brain vs Hardware filters
N6KR: The decoder also works for PSK31 and RTTY, and you can transmit in these modes just by sending CW with the keyer paddle (or an attached keyboard). This eliminates the computer entirely, should you be so inclined. This is going to do wonders for expeditions using digital modes! I've never used digital before but I'll bet the digital community will be thanking you for all the expeditions they work once the K3 starts shipping. Truly an incredible innovation! 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 8-pole vs. 5-pole roofing filters?
I had 2 CW filters in my TenTec OmniV and did a lot of A/B comparing with them. One was an 8 pole Inrad 400 Hz filter and the other was a 6 pole TenTec 500 Hz filter. I had them both in the rig at the same time specifically to decide which one to keep. I was able to detect the steeper skirts of the 8 pole filter as well as the narrower passband, but the factor that eventually tipped the scales was ultimate rejection. The TT filter, had better ultimate rejection. Once I tuned past a signal, it went away and didn't come back. With the Inrad filter, the signal would drop quicker, hit bottom and then come back up. I could hear strong signals 6-8 KHz away. So, I went with the TT filter because for me, ultimate rejection was more important than the slightly narrower passband. Now, the question is whether or not the 5 vs 8 pole filters for the K3 have different levels of ultimate rejection. If they do, then the choice has become tougher. - Keith N1AS - - K2 5411.ssb.100 - -Original Message- From: William Hein, NT1Y What's the performance difference between the 8-pole and 5-pole K3 roofing filters? For crowded-band CW performance am I better off with a 5-pole 200-Hz or a 8-pole 250-Hz filter? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Kit philosophy
Just to say that this will be my first Elecraft kit - I think with modern SM technology, Elecraft had no choice but to go the direction they have. If they didn't use SMD, they wouldn't be a contender or the K3 would have been the size of my refrigerator in order to get all the functionality! And fwiw, one reason I was previously looking at the FT-2000 instead of a K2 was the build time (other were DSP and second tuner etc). The K3 changed all that - has in fact beaten it. I'm still a new ham, but I think Elecraft got the flexibility of the FT-2000 with the features (true 2nd Rx) of the FT-9000 for a fraction of the price. Besides, I've ordered a XV144 too, so I'll get some serious building in as well :-) -- An old miser kept a tame jackdaw, that used to steal pieces of money, and hide them in a hole, which a cat observing, asked, Why he would hoard up those round shining things that he could make no use of? Why, said the jackdaw, my master has a whole chestfull, and makes no more use of them that I do. -Jonathan Swift, satirist (1667-1745) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT: To Steve, t-shirt image in gimp
Steve, I lost your email and call (!), so I hope you see this. You asked how I made the k3 t-shirt image using gimp. The image itself, I think you have it, is at http://udel.edu/~mm/ham/elecraft/t.png but the gimp file is at http://udel.edu/~mm/ham/elecraft/t.xcf - nothing tricky there. Please email me so we can talk about it offlist. Apologies to the list for the personal note. (Also, this isn't a real t-shirt, just a response to Wayne's request for ideas last week.) 73, Mike ab3ap ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KAT-100 completed
Just completed and tested a KAT-100 in the EC2 enclosure. Like the K2 and the KPA-100, I turned it on, and everything worked fine. I think I may be seeing some digital noise getting into my K2 from the addition of the outboard tuner. I saw some discussion recently about noise from the RS- 232 cable in the K2. Have others seen any problems with noise when adding the KAT-100? If so, any tips on minimizing or eliminating it? 73, Tom KG3V ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] What's a panadapter?
The K3 will have one (eventually), but what is it? In some contexts it sounds like an antenna analyzer, in others like a spectrum display. And ... could someone explain where the name panadapter comes from? Peter N8MHD ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 8 pole vs 5 pole..I knew this would happen
Hi all: The notation below (previously posted) is referring to the final passband filter and NOT a roofing filter. You are trying to compare apples and oranges. I think you would be hard pressed to discern (in real use) a difference between the 200 and 250 hz ROOFING filter, except in LOSS (which will be compensated for later). Pesonally, for cw work, I think both of those will be too narrow for my liking, especially if I want to tune around the band and not have signals suddenly POP into the final passband (which I like to keep fairly wide). I want to hear what's coming! de Doug KR2Q I had 2 CW filters in my TenTec OmniV and did a lot of A/B comparing with them. One was an 8 pole Inrad 400 Hz filter and the other was a 6 pole TenTec 500 Hz filter. I had them both in the rig at the same time specifically to decide which one to keep. I was able to detect the steeper skirts of the 8 pole filter as well as the narrower passband, but the factor that eventually tipped the scales was ultimate rejection. The TT filter, had better ultimate rejection. Once I tuned past a signal, it went away and didn't come back. With the Inrad filter, the signal would drop quicker, hit bottom and then come back up. I could hear strong signals 6-8 KHz away. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 microphone options
Thanks to all for the replies to my K2 microphone question. I have a much better idea what my options are now. I am leaning toward a Heil iCM or Handi_Mic (electret), but considering the TenTec 701. I imagine that the new MH2 would be ideal, but I hope to finish my K2 by the end of May, and don't know if I could bear the wait (for its release). 73, Greg ki4mmm On May 2, 2007, at 8:43 PM, Bernie Gardner wrote: Greg, I bought a Handi_Mic for K2 5707 a few months ago. As Don stated, you need to get the electret type, iC version. I bought the Kenwood cable, wired the K2 header straight through. I incorporated a resistor to power the electret element in the body of the connector on the cable. That seemed easier than removing the front panel to make the connections on the header. It's worked great with plenty of drive and receives good comments on the air. Bernie W1AZ On Wednesday 02 May 2007 09:24, Greg Derda wrote: Hi all, I am in the process of building K2 #6001 and need to start thinking about a microphone. I've looked over the Reflector archives, and it seems that there are lot of little mods needed for a variety of microphones. The simplest solution would be a MH2, but I don't know that I can wait until the June 15 production date. Question is, can I not just jumper my K2 for Kenwood, buy a Heil HM-10 or Handi_Mic, and plug-n-play (without any internal K2 mods)? I will get a Pro Set someday, but I just want a decent little microphone to get me started. Any suggestions? Thanks and 73, Greg KI4MMM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What's a panadapter?
Panadapter comes from Panoramic adapter, invented by Marcel Wallace in the 1930's. Good history at http://home.comcast.net/~cbmcg/Panadaptors.html You can also find a more modern version that I developed at www.cliftonlaboratories.com. Jack K8ZOA Peter Wollan wrote: The K3 will have one (eventually), but what is it? In some contexts it sounds like an antenna analyzer, in others like a spectrum display. And ... could someone explain where the name panadapter comes from? Peter N8MHD ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 8-pole vs. 5-pole roofing filters?
Interesting to note that the 250 hz 8 pole filter actually has a -6 dB bw of 370 kHz. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Tippett Sent: Thursday, May 03, 2007 9:13 AM To: elecraft@mailman.qth.net Subject: [Elecraft] 8-pole vs. 5-pole roofing filters? roofing filters? Good question, but the answer is more than simply bandwidth and shape factor. You need to know its performance *in the radio^ with IMD and BDR measurements. As ARRL discovered with Orion's 500 Hz 8-pole filter, it had much worse IMD than the stock 1000 Hz 4-pole. Granted this had much to do with a poor circuit design but there is no substitute for *in radio* measurements, since the gain distribution for a 5-pole versus 8-pole MUST be different due to different insertion loss which can affect overall IMD/BDR performance. For crowded-band CW performance am I better off with a 5-pole 200-Hz or a 8-pole 250-Hz filter? Given no IMD/BDR issues, probably the 250 because of better skirt selectivity, but you really should look at the individual filter response plots to know for sure. Also, do I need separate roofing filters for the main and sub-RX? Yes, 5 slots available in both. 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Re: K3 Power (clarification: *quiet* switcher!)
I use a 60-amp switcher from Diamond (GSV-6000) for driving both the K2/100 *plus* the HLA-300 amp (45A) without any issues. The supply is clean. One note: most smallish generators (think 'field day' !) do hate this power supply. I have seen 3KVA diesel units go into a panic mode when the GSV was turned on. Dunno what that is about- my own (diesel) generator seems OK with the very same supply. --f -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of wayne burdick Sent: donderdag 3 mei 2007 4:50 To: wayne burdick Cc: elecraft@mailman.qth.net Subject: [Elecraft] Re: K3 Power (clarification: *quiet* switcher!) Not yet, but I'd use a 4-6 amp supply for 10 W and 20-25A for 100 W. To minimize noise, use a linear supply or a *quiet* (low RFI) switcher. Wayne --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] What's a panadapter?
Hi Peter, A Panadaptor gets its name from an abbreviation of Panoramic receiver display adaptor. Its purpose is to allow the radio operator to see what signals are within the band of frequencies that he is operating. For example instead of manually tuning or scanning the receiver to find a station to contact. The Panadaptor will show all of signals within a few hundred KiloHertz. Some adaptors have the provision for a Mouse like control where you can move the cursor over a signals peak and the click the Mouse, the receiver will be automatically tuned to the frequency. It also provides valuable information on whether there are any strong adjacent channel signals that you may want to avoid to have some control over interference. See this link for a historical reference: http://oak.cats.ohiou.edu/~postr/bapix/Panadap.htm 73, Bob Johansen WB2SRF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MH-2 Mic
Can the K3's mic connector be configured in the same manner as the K2's to suit different schemes? No, it is wired like the K2 if you used straight-across strapping. It can't be configured like Icom, Yaesu, etc. This is now in the FAQ. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Power supplies ..
I'm using an Alinco DM-330MV switching power supply for my K2 with no problems. It has a control that allows me to move the frequency of any RFI I encounter from the supply, but I've never heard any. Craig NZ0R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JACrux Sent: Thursday, May 03, 2007 5:26 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Power supplies .. Recent experience here suggests that finding a switcher that does NOT cause RFI and fan noise problems is a problem. I just went back to using a boat anchor industrial linear supply weighing in at around 40-50 lbs for that reason. Unfortunately it came with large terminal bolts, no PowerPole connectors ! But it works and there is no noisy fan and it will certainly run a K3 as well as a K2 and my Omni-V.9. MFJ offer a heavy 25 amp+ linear supply, but why oh why is it only 110 VAC input ? G3JAG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
Bill Tippett wrote: N6KR: The decoder also works for PSK31 and RTTY, and you can transmit in these modes just by sending CW with the keyer paddle I've never used digital before but I'll bet the digital community will be thanking you for all the expeditions they work once the K3 starts shipping. Truly an incredible innovation! I agree that this feature has me very excited about trying PSK31, which I've never bothered to do. I can send CW much faster than I can type! Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What's a panadapter?
IIRC, Panadapter is (or was) a trademarked name. Certainly it's come pretty close to being generic, but I suspect that why the display in current radios is called a bandscope. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8-pole vs. 5-pole roofing filters?
Darwin, Keith wrote: Now, the question is whether or not the 5 vs 8 pole filters for the K3 have different levels of ultimate rejection. If they do, then the choice has become tougher. My guess is that the better ultimate rejection that you experienced when you compared Tentec and INRAD filters had more to do with the details of the installation of the filters rather than the quality of the filters themselves. The blow-by you experienced with the INRAD filter was probably taking place AROUND the filter as a result of stray capacitance, shielding, and grounding issues. These factors will probably be more or less the same with different Elecraft filters. Probably the ultimate rejection of all of the filters will be limited by the outside factors -- the filters will be 'better' than the wiring. And in the K3 the DSP will improve the ultimate rejection of any filter, since we assume that residual signals will be too small to actuate the AGC or cause IM products. So I do not think that ultimate rejection will be a consideration for choosing the K3 filters. Having said this, I'm still debating whether I should get the 5 or 8 pole CW filters! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What's a panadapter?
If anyone has experience, they will get a good chuckle. The AN/ALR 20 on the B52 aircraft was developed in the 60s, and it sounds like it has been recently replaced. Now THAT was a panoramic display. David Wilburn [EMAIL PROTECTED] K4DGW K2 #5982 Doug Faunt N6TQS +1-510-655-8604 wrote: IIRC, Panadapter is (or was) a trademarked name. Certainly it's come pretty close to being generic, but I suspect that why the display in current radios is called a bandscope. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
On Thu, 3 May 2007 8:34 am, Vic K2VCO wrote: I agree that this feature has me very excited about trying PSK31, which I've never bothered to do. I can send CW much faster than I can type! This was my kids' 3rd-grade science project. They tested hams on sending CW and typing. After discarding the data from the one or two hams each who could do only one of the two tasks, they found hams on average type faster than they send, but make fewer errors with CW. Hmmm...maybe they should send it in to QEX. Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This sounds like a mere matter of programming and would fit right in with Wayne's CWPDA idea he posted here a year or two ago. Leigh/WA5ZNU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What's a panadapter?
Hi Paul, You have a very good point. Band Scope by definition makes a lot more sense to relate to its purpose. 73, Bob Johansen WB2SRF On Thu, 3 May 2007 11:46:27 -0400 (EDT) Doug Faunt N6TQS +1-510-655-8604 [EMAIL PROTECTED] writes: IIRC, Panadapter is (or was) a trademarked name. Certainly it's come pretty close to being generic, but I suspect that why the display in current radios is called a bandscope. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Brain vs Hardware filters
Vic K2VCO wrote: Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This is a great idea, Vic. We could certainly buffer incoming PSK31 or RTTY, once decoded, and play it back as audio Morse. Added to the list. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] What is LED
What is the LED indicator to the right of the Tx LED, just above the Phones socket? Any K2 owners know that? -- The high minded man must care more for the truth than for what people think. -Aristotle, philosopher (384-322 BCE) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
It would also be great for vision impaired hams. Larry N8LP wayne burdick wrote: Vic K2VCO wrote: Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This is a great idea, Vic. We could certainly buffer incoming PSK31 or RTTY, once decoded, and play it back as audio Morse. Added to the list. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 8 pole vs 5 pole..I knew this would happen
I think, still, someone needs to define what a ROOFING FILTER is. Say for sake of argument - I have a passive or active or crystal filter - and it is to be used as a ROOFING FILTER. Why is it called this? Why is the filter itself, called a ROOFING FILTER? And where does the adjective, ROOFING, come into play? .. I'm sure I'm dumb on this one - but would like to learn. Not until the K3 came on the Elecraft scene - did anyone mention or get concerned about the need for ROOFING FILTERS. Now they're all the rage? Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
What do you mean by generating CW characters to copy by ear? Do you mean while in digital mode for PSK/RTTY? When sending digital modes via the CW keyer the feedback while sending is in CW. But you will also hear a lower level PSK/RTTY tone in the background to remind you the signal is transmitting as the appropriate digital mode. 73, Greg AB7R On Thu, 03 May 2007 08:34:00 -0700 Vic K2VCO [EMAIL PROTECTED] wrote: Bill Tippett wrote: N6KR: The decoder also works for PSK31 and RTTY, and you can transmit in these modes just by sending CW with the keyer paddle I've never used digital before but I'll bet the digital community will be thanking you for all the expeditions they work once the K3 starts shipping. Truly an incredible innovation! I agree that this feature has me very excited about trying PSK31, which I've never bothered to do. I can send CW much faster than I can type! Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
This is the kind of sexy feature that /defines/ Elecraft! I built a warbler just for the experience, but I never operate RTTY or PSK31. I spend all day in front of computers -- I don't want to have to use one to play radio! I also /love/ being able to operate with my eyes closed. This single feature would be just the ticket for getting my into these modes, and it would provide an easy way to work my digital mode friends! It's like when I was a kid and I was going to be able to afford a Color Computer III at the end of the summer. I was insufferably excited! I can't wait for July! On Thu, 3 May 2007, Larry Phipps wrote: It would also be great for vision impaired hams. Larry N8LP wayne burdick wrote: Vic K2VCO wrote: Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This is a great idea, Vic. We could certainly buffer incoming PSK31 or RTTY, once decoded, and play it back as audio Morse. Added to the list. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] W1 and AF1 Enclosures Now Available
Hello all, I planned on making this announcement on Monday, but the list seemed a little busy :-) I am finally pleased to announce that testing of the enclosures is done and the installation documentation has now been completed. Thanks to fellow list members Eric Swartz, Ron D'Eau Claire, Fred Jensen and Mike Markowski for their patience in testing the prototypes for me and providing great feedback. All parts and shipping supplies are now on hand and I am ready to begin production of these enclosures. There are now three different designs of the W1 enclosure to incorporate the three different mounting methods of the BNC connectors (J1 J2) to the W1 printed circuit board. They are: . Top mounted, right angle BNC connectors (as supplied in the W1 kit). . Bottom mounted, right angle BNC connectors (as supplied in the W1 kit) . Bottom mounted, straight through BNC connectors (as supplied by W8FGU or Digi-KeyR www.digikey.com, part number A32246-ND or Mouser ElectronicsR www.mouser.com, part number 571-2272226) The first version is slightly thicker and designed to house W1 kits already built per the Elecraft W1 manual for use without an enclosure. It is still recommended to mount the battery connector on the back of the W1 PCB for regardless of the version to make it easier to change the battery when needed. If you have not yet built the W1 (or at least not mounted the BNC connectors to the top of the PCB) it is recommended to mount the BNC connectors (right angle or straight through, whichever is desired) on the back of the PCB and install it in the bottom mounted BNC versions of the enclosure. A tilt stand for the W1 enclosure is also available separately. It is held to the enclosure with Velcro and allows the W1 to be tilted back at just about any angle. I made the stand a separate option after much feedback from those who didn't need a stand or the expense that came with it. The AF1 enclosure is pretty straight forward with the AF1 PCB mounted to the top of the enclosure and inserted into the bottom box. Info on these enclosures and complete installation instructions can now be found on my website: http://w8fgu.home.comcast.net Pricing info for the enclosures is as follows: AF1 Enclosure $24 W1 Enclosure: $27 Tilt Stand: $6 Pair of straight through BNC's $5 Shipping Handling $6.50 (domestic only - will quote international shipping) At this point, I can only accept US currency in the form of a cashiers check, money order or personal check. Mail to: Dave Van Wallaghen, W8FGU 31563 West Jefferson Brownstown, MI 48173 Email me with your order info stating: AF1 or W1 enclosure W1 version type (see above) Also specify if you would like a Tilt Stand or Straight through BNC connectors. I will reply to your email with a total amount to confirm the order. I will begin production of the enclosure as soon as I receive your email order and ship it when I receive your payment. I will be helping out in the Elecraft booth this year in Dayton. Eric and Wayne were gracious enough to allow me to display a few enclosures while I'm there. I will have some stock in Dayton for those who will be attending and would like to see it before buying. I will obviously skip the SH charge (although with the price of gas... ;-) ) If you have and questions or concerns, please don't hesitate to contact me. Thanks for the bandwidth. Take care 73, Dave W8FGU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
Now I see what Vic was referring to. Thought he meant the monitored feedback during transmit. Cool idea Vic! On Thu, 3 May 2007 09:39:35 -0700 wayne burdick [EMAIL PROTECTED] wrote: Vic K2VCO wrote: Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This is a great idea, Vic. We could certainly buffer incoming PSK31 or RTTY, once decoded, and play it back as audio Morse. Added to the list. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
The term roofing filter has been around a long time, at least 20 years. Usually used in the context of up-converting receivers, where the first IF is 40.455 MHz, or 45.000 MHz or even higher. The term means the first selective filter in the receiver. If the first IF is 30 MHz, the roofing filter is generally wider than one normally needs for SSB or even AM, and the receiver's ultimate selectivity is provided in a later IF stage. As to why it is called a roofing filter, I imagine it derives from the fact that it puts a roof over the receiver's selectivity. Jack K8ZOA Fred (FL) wrote: I think, still, someone needs to define what a ROOFING FILTER is. Say for sake of argument - I have a passive or active or crystal filter - and it is to be used as a ROOFING FILTER. Why is it called this? Why is the filter itself, called a ROOFING FILTER? And where does the adjective, ROOFING, come into play? .. I'm sure I'm dumb on this one - but would like to learn. Not until the K3 came on the Elecraft scene - did anyone mention or get concerned about the need for ROOFING FILTERS. Now they're all the rage? Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What is LED
This LED will also light if transmitting when the TX freq and Rx freq are different. That's in SPLIT mode or when the RIT/XIT are used. 73 Greg AB7R On Thu, 03 May 2007 17:42:22 +0100 David Ferrington [EMAIL PROTECTED] wrote: What is the LED indicator to the right of the Tx LED, just above the Phones socket? Any K2 owners know that? -- The high minded man must care more for the truth than for what people think. -Aristotle, philosopher (384-322 BCE) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] What's a panadapter?
A quick search of the US trademark database (www.uspto.gov) says it's available. It's mentioned as a type of equipment sold by Squires-Sanders in a 1963 filing for their logo, but it's not named as a trademark by anyone I could find. Bandscope is similarly unclaimed. IANAL, but both would probably be dismissed for being generic at this point. Craig NZ0R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Doug Faunt N6TQS +1-510-655-8604 Sent: Thursday, May 03, 2007 10:46 AM To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] What's a panadapter? IIRC, Panadapter is (or was) a trademarked name. Certainly it's come pretty close to being generic, but I suspect that why the display in current radios is called a bandscope. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What is LED
Ah - hence the delta Thank you On 3/5/07 18:11, FISCHER,GREG [EMAIL PROTECTED] sent: This LED will also light if transmitting when the TX freq and Rx freq are different. That's in SPLIT mode or when the RIT/XIT are used. 73 Greg AB7R On Thu, 03 May 2007 17:42:22 +0100 David Ferrington [EMAIL PROTECTED] wrote: What is the LED indicator to the right of the Tx LED, just above the Phones socket? Any K2 owners know that? -- The high minded man must care more for the truth than for what people think. -Aristotle, philosopher (384-322 BCE) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be. -Isaac Asimov, scientist and writer (1920-1992) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re:What is LED
Looks to me as if it says Delta frequency. I would suspect XIT/RIT 72, Ran - W1IN ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Roofing filters - I think the term has more to do with marketing than engineering. Other companies have made a big deal over having them and people have come to think of them as something special. They are little more than filters placed early in the RX signal path to limit bandwidth ASAP. They were added to correct issues / problems that have crept into modern synth-based mulit-mode radios and they really do make the receivers work better. I have no idea where the term Roofing comes and I certainly don't try to make sense of it. It is just a term applied to a filter that is very worth having in a rig. What is sweet about the K2 is that the filters in the K2 are positioned early in the signal path so they in effect operate similar to the roofing filters that other manufactures put in their rigs. Check out the K2's RX performance and you'll see it is great. Early filtering is partly why. - Keith N1AS - - K2 5411.ssb.100 - -Original Message- I think, still, someone needs to define what a ROOFING FILTER is. Say for sake of argument - I have a passive or active or crystal filter - and it is to be used as a ROOFING FILTER. Why is it called this? Why is the filter itself, called a ROOFING FILTER? And where does the adjective, ROOFING, come into play? .. I'm sure I'm dumb on this one - but would like to learn. Not until the K3 came on the Elecraft scene - did anyone mention or get concerned about the need for ROOFING FILTERS. Now they're all the rage? Fred, N3CSY ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
A lack of understanding is also shown in the FT-2000 Yahoo! group. A fine document which explains traditional roofing filters is here: http://www.qth.com/inrad/roofing-filters.pdf . The FT-2000 is an up-conversion receiver (unless I've lost the plot again). Elecraft's design is more subtle and has been explained several times in this list. Simon Brown, HB9DRV - Original Message - From: Darwin, Keith [EMAIL PROTECTED] Roofing filters - I think the term has more to do with marketing than engineering. Other companies have made a big deal over having them and people have come to think of them as something special. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] one mo' time on roofing filters, etc
Okay, I'm done being creative. Try these . PS... And roofing filter rage has been around for quite some time...it is far from an Elecraft phenom. de Doug KR2Q http://www.w8ji.com/receivers.htm http://www.sherweng.com/Dayton_2004/Dayton_2004-Sherwood.ppt http://www.radio-electronics.com/info/receivers/filters/filter_options.php http://www.dxstore.com/download/inrad_roofing_filters.pdf http://images.tentec.com/radio/pdf/565optimize.htm ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re:What is LED
RIT/XIT and Split. Anytime you tranmit and the RX and TX frequencies are different. 73 Greg AB7R On Thu, 3 May 2007 10:32:20 -0700 (PDT) W1IN [EMAIL PROTECTED] wrote: Looks to me as if it says Delta frequency. I would suspect XIT/RIT 72, Ran - W1IN ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] one mo' time on roofing filters, etc
KR2Q: PS... And roofing filter rage has been around for quite some time...it is far from an Elecraft phenom. Yep...at least since the mid-70's when Sherwood introduced a 600 Hz roofing filter for the Drake R4C. It addressed exactly the same IMD/BDR issues as today. Receiver performance is not new...the JA rigs just went to sleep for about 30 years while obsessing with FM, general coverage receive and other trivia. Meanwhile basic RX performance went down the tubes when they forced 15-20 kHz roofing filters on all of us. 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Just cannot resist saying this Jack, the term roofing filter has certainly been around for a long time - close to 50 years I believe, possibly longer. I think that I first ran across the term being used to identify the first IF filter in an Independent Sideband Receiver which the company for whom I worked manufactured for HF Point-to-Point applications in the very late 1950's, along with companion high power ISB transmitters. Perhaps some other term might be less confusing and prevent any misuse of the term , but don't let us change from roofing filter now!! 73, Geoff GM4ESD Jack Smith wrote: The term roofing filter has been around a long time, at least 20 years. Usually used in the context of up-converting receivers, where the first IF is 40.455 MHz, or 45.000 MHz or even higher. The term means the first selective filter in the receiver. If the first IF is 30 MHz, the roofing filter is generally wider than one normally needs for SSB or even AM, and the receiver's ultimate selectivity is provided in a later IF stage. As to why it is called a roofing filter, I imagine it derives from the fact that it puts a roof over the receiver's selectivity. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
One more data point on the term roofing filter. I have a copy of the June 1981 RSGB Radio Communications magazine that reviewed Drake's TR7. It describes the design as follows: A low-noise, wide-dynamic range amplifier is used at 48.05 MHz to precede the 10-KHz wide roofing filter. Leaving aside the RSGB's odd use of hyphens, it describes the filter as a roofing filter although Drake does not use the term in its technical manual. Is it the case that roofing filter is UK terminology that has made its way to the US side of the pond only recently? Jack Geoffrey Mackenzie-Kennedy wrote: Just cannot resist saying this Jack, the term roofing filter has certainly been around for a long time - close to 50 years I believe, possibly longer. I think that I first ran across the term being used to identify the first IF filter in an Independent Sideband Receiver which the company for whom I worked manufactured for HF Point-to-Point applications in the very late 1950's, along with companion high power ISB transmitters. Perhaps some other term might be less confusing and prevent any misuse of the term , but don't let us change from roofing filter now!! 73, Geoff GM4ESD Jack Smith wrote: The term roofing filter has been around a long time, at least 20 years. Usually used in the context of up-converting receivers, where the first IF is 40.455 MHz, or 45.000 MHz or even higher. The term means the first selective filter in the receiver. If the first IF is 30 MHz, the roofing filter is generally wider than one normally needs for SSB or even AM, and the receiver's ultimate selectivity is provided in a later IF stage. As to why it is called a roofing filter, I imagine it derives from the fact that it puts a roof over the receiver's selectivity. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Marketing term, I tell ya, pushed extra hard by the sales folks at YaeComWood. :-) -Original Message- ... it describes the filter as a roofing filter although Drake does not use the term in its technical manual. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] XV 432 questions...
Hi guys, although the XVTR seems to operate quite ok there are some issues: Local Oscillator Level: Max is 3.3 volts with L3 near initial adjustment but L4 and L5 are about two turns each out of the body. Osc. restarts ok. is this ok? Keying for filter adjustment: When keying the rig power slowly decreases. just a few percent. Overload protection behaves strangely: Rig is configured for use with K2 Jumper 8 removal results in power off from XVTR Keying the K2 triggers nothing. The LEDs don't begin to flash. any hint appreciated! Gerhard DH3FAW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Oh, and no I don't think I did an apples to oranges comparison. The filters, whether placed early or late in the signal chain, have the same effect on bandwidth and out-of-band signal rejection. What I compared was 8 vs. 6 pole and that showed me some things that are applicable to the 5 vs. 8 pole choice we have with the K3. While the filters were not in the same place as they would be in a roofing application, the info gathered was certainly applicable. - Keith N1AS - - K2 5411.ssb.100 - -Original Message- The notation below (previously posted) is referring to the final passband filter and NOT a roofing filter. You are trying to compare apples and oranges. === I had 2 CW filters in my TenTec OmniV and did a lot of A/B comparing with them. One was an 8 pole Inrad 400 Hz filter and the other was a 6 pole TenTec 500 Hz filter. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Irrespective of the original source of the term roofing filter, it seems clear enough that whoever made it up wanted to imply the idea of protection, which is the word used in the RSGB document. A ROOF is a first line of protection against having nearby high-energy stuff from the outside world (rain, hail, falling rocks and trees) hit you in the head. :-) A ROOFING FILTER is likewise a first line of protection for the stage that follows it against nearby high-energy signals hitting it in the head. (Er, the base, or the gate, or whatever.) Whether it was first used in some marketing brochure or in an engineering paper, the term nonetheless is aptly descriptive. Since the concept involved really has to be understood in order for the term to make sense, however, I tend to lean toward the idea that it was made up by an engineer. Most marketing guys aren't that smart. Uh, no offense intended. :-) Bill / W5WVO Darwin, Keith wrote: Marketing term, I tell ya, pushed extra hard by the sales folks at YaeComWood. :-) -Original Message- ... it describes the filter as a roofing filter although Drake does not use the term in its technical manual. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What's a panadapter?
The original Panadaptors, as I recall, in the WW2 era, worked in the receiver IF, as RF spectrum analysis was but a dream when it came to affordable circuitry. Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
I do not know where or when the term roofing filter first appeared, when I first came across it in the late 1950s I was working in Canada. I suspect that the term originated in N.America, most probably in connection with the type of equipment which I mentioned, most of which was purchased by Common Carriers for use on long haul international circuits. 73, Geoff GM4ESD Jack Smith wrote: One more data point on the term roofing filter. I have a copy of the June 1981 RSGB Radio Communications magazine that reviewed Drake's TR7. It describes the design as follows: A low-noise, wide-dynamic range amplifier is used at 48.05 MHz to precede the 10-KHz wide roofing filter. Leaving aside the RSGB's odd use of hyphens, it describes the filter as a roofing filter although Drake does not use the term in its technical manual. Is it the case that roofing filter is UK terminology that has made its way to the US side of the pond only recently? Jack ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
FW: [Elecraft] 8 pole vs 5 pole..I knew this would happen
-Original Message- From: Brett gazdzinski [mailto:[EMAIL PROTECTED] Sent: Thursday, May 03, 2007 2:02 PM To: 'Fred (FL)' Subject: RE: [Elecraft] 8 pole vs 5 pole..I knew this would happen I think, in the past, it was the first filter, before all the conversions. When they started with the general coverage receivers, plus all mode, the first filter had to be wide enough for the maximum signal you would want to listen to, or transmit, say 6Khz for AM, 15Khz for FM. So, they saved money by just installing a 15 or 20 Khz roofing filter, everything was under the one roof. You had smaller rooms under the roof (regular filters)... I am not sure, but its possible some early rigs did not HAVE a roofing filter at all.. Depending on the first IF frequency, its possible they could not make a decent filter even if they wanted to. Maybe in the 3rd IF you would have the 'real' filters and/or dsp. In the beginning, maybe the 3rd IF was at 455 Khz, or 262Khz, or 50 Khz. I think drake used 50Khz in some of their stuff. The lower you go in frequency, the easier to make and better the filter is, at least in the past it was. 262Khz IF transformers could be made much narrower than 455Khz ones, hence some companies using 50Khz. So you had multi conversion rigs, with general coverage, which meant they would go someplace beyond the highest frequency you were going to tune for the first IF to eliminate images, then they had to use a filter that would pass FM... Now that computers have invaded radios, you can do all sorts of things with the logic, but only Elecraft seems to use it to actually improve the results. I think the K2 shows that with its low parts count, single conversion, yet great results. Until very recently, most ham gear seemed to be quite poor despite all they hype and gizmos, jack of all trades, master of none. I think 'roofing filter' is a bad and silly name, but there it is. Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fred (FL) Sent: Thursday, May 03, 2007 12:55 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 8 pole vs 5 pole..I knew this would happen I think, still, someone needs to define what a ROOFING FILTER is. Say for sake of argument - I have a passive or active or crystal filter - and it is to be used as a ROOFING FILTER. Why is it called this? Why is the filter itself, called a ROOFING FILTER? And where does the adjective, ROOFING, come into play? .. I'm sure I'm dumb on this one - but would like to learn. Not until the K3 came on the Elecraft scene - did anyone mention or get concerned about the need for ROOFING FILTERS. Now they're all the rage? Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Update on k2 #6089
Hi All, I haven't added anything to the list for a bit, but i thought an update on my K2 would be in order :) Currently I have just completed stage one tuning and aligning of the radio and so far all is bang on Spec. i did find setting the AGC threshold a bit fiddley (I think I need 3 hands) So I'm going to be start on Stage at the week end and hopefully that will go as the first part of the kit has. My little 4 year old had the honour of being the person to switch the K2 on as he has beenhelping me to build the kit :) 73 Gary Gary McKelvie G7USC Web : www.garym.org.uk Mobile : +447968501863 MSN Messenger : [EMAIL PROTECTED] So Long and Thanks for all the Fish ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What is LED
Aristotle, no callsign. Do you man on the K2 or the K3? C h r i sG 3 S J J ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] here is how to get a feel for a roofing
Hi Brett, your questions are interesting but they requires many words to clarify them... I will try to give you simple answers and may be other friends will add replies. Message: 22 Date: Wed, 02 May 2007 11:38:44 -0400 From: Brett gazdzinski [EMAIL PROTECTED] Subject: RE: [Elecraft] here is how to get a feel for a roofing filter To: elecraft@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=US-ASCII Is there no way to put dsp at/as the first filter? Yes, more or less. This is High Performance Software Defined Radio solution where you connect the ADC to the antenna, then a DSP is handling all the demodulation of signals, manage the filters and notches, once this works (software) is completed the voices or dit dah willa come out from an audio amplifier and on to the loudspeaker(s). K3 is on the hardware and software transmitter and receiver group. What are the limitations of the dsp, frequency, filter quality? Is there a problem getting dsp to work at say 455 khz? Putting the DSP (including ADC and DAC) at 455kHz is not a problem as the key is the ADC frequency limit. There will be not too much difference between havin the IF at 455kHz or 15kHz as the major work will be done by the software application. What would be the result of a real good variable filter at the 8.215 Mhz IF just after the mixer and NO dsp for filtering? (K2?) The result will be a K2 with a higher IF. DSP is a powerfull stage (including the software) to generate filters at audio level. No ringing with narrow filters and soft to straight attenuation skirt better than xtal filters. The 2nd IF of 15 khz is audio, is it not? NO. certainly if you have a good ear you can listen to something... It is an electrical Frequency like the ones used for submarine communications and other services. At what point does the audio spectrum end and RF begin? The RF (IF) ends inside the Analog to Digital Converter (ADC)... then you have digital signals handled by the DSP (and SW). The audio start at the output of the Digital to Analog Converter (DAC) I notice that the K3 info says the dsp is in the 2nd IF, but the 2nd IF is high pitched audio? Even if the 15kHz is a frequency that has an equivalent in the audio, it is a real IF and the conversion to this second IF is done by a second mixer converting from 8.250MHz to 15kHz, more or less like an SSB/CW demodulator. This modern stuff sure spins my head, the homebrew receiver is a single conversion to 455khz, no rf amp, good filter just after the mixer, wide IF chain, detector. It seems to work real well, and is basically the old tube table top radio (all American 5?) with a good filter, s meter, and a digital frequency readout. I know what you mean ... I am an analog chap and do not like a PC in my radioshack ... but I am fiddling with it, on and off to learn what SDR, Software Defined Radio con do ... today we can play with an analog mixer that converts from HF to audio...yes the stuff that comes out from the loudspeaker ... and then you have a BIG DSP ASSY ... the Audio Card (Stereo) a Big PC and a Software application that may make you crazy to look at the PC screen ... Soon all this type of SDR will become obsolete like a valve receiver because the receiver will be nearly 100% all digital ... the only analog stuff will be the antenna, the bandpass filters and the loudspeaker ... plus a BI and Powerfull PC. At this point you will have to change operating technique as you will be able to operate with several stations and your roofing filters will be your BandPass Filters ... our good friends at INRAD will retire and we will be able to buy second hand surplus xtal filters for a couple of dollars (I hope .. hi) I hope I was able to clarify at least partially your right questions BTW, if you can fidlle with a soldering iron and have a K2 I can send you a working front end mod (1st mixer replacement) that can improve it to an IP3 of +27dBm , from a +15dBm value, and the addition of a xtal homebrew roofing filter at 4.9xx MHz. 73 Gian I7SWX Brett N2DTS __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
As an unintended consequence, you would give blind hams who have good morse skills the capability of working the digital modes. A real plus! A close friend of mine, a blind ham, for many years was able to have a packet mailbox on our network. He was able to read and send mail through an ascii to morse - morse to ascii interface which he used in conjunction with a computer and keyboard. It took patience on his part and excellent cw skills, but he had access to a whole new world and enjoyed it very much. Of course packet died in these parts and that was the end of digital hamming for him. Best, jerome - va7vv Vancouver --- wayne burdick [EMAIL PROTECTED] wrote: Vic K2VCO wrote: Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This is a great idea, Vic. We could certainly buffer incoming PSK31 or RTTY, once decoded, and play it back as audio Morse. Added to the list. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] here is how to get a feel for a roofing
F.Y.I. I know of at least two experimental ANTENNA -- DSP designs that are out there being tested: HPSDR Mercury design http://hpsdr.org/mercury.html and Phil Covington N8VB's QuickSilver QS1R/QS1T design http://pcovington.blogspot.com/2006/12/qucksilver-qs1r-software-defined.html de ken n9vv Is there no way to put dsp at/as the first filter? Yes, more or less. This is High Performance Software Defined Radio solution where you connect the ADC to the antenna, then a DSP is handling all the demodulation of signals, manage the filters and notches, once this works (software) is completed the voices or dit dah willa come out from an audio amplifier and on to the loudspeaker(s). ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] here is how to get a feel for a roofing
Additional comments on using an A/D at the front end of a radio. High Speed A/Ds that can handle the wide dynamic range of radio signals are still an art form. Any A/D suffers from the need to have filtering in front of it to avoid a malady known as aliasing. In A/D theory, without band limiting the signals into the A/D, it might try to convert signals out of the band you want, as well as the in band components. You could have the unwanted freqeuncies be the same spacing from the converter clock frequency, as the desired signals, and then they fold into the band of desired signals, but would be like noise or interference. The clocking of the A/D conversion, (the switching speed) must be at least twice your highest desired frequency, and preferably four times the highest in band frequency. The clock must be stable, and not have jitter. For a 30 MHz radio, you might then need a clock of 120 MHz. This has the aircraft band among others, below the clock frequency, and there is the FM broadcast band, as well as low band public safety communications. In other words, a lot of undesired signals that could fold into the desired HF bands when using an A/D. For this reason, as an Anti-aliasing filter we DO put a high quality filter in front of precision A/D converters, to limit the signals to those of interest to us as an HF radio. Thus, the need for a roofing filter is not restricted to just an analog radio, but enters in for direct digital conversion as well. If you Google search for Analog to Digital Conversion you will get many white papers and tutorials on all the faults of A/D processes. That is why they are not common in radios yet at front end RF frequencies. You need many bits to handle a radio's dynamic range, or you need programmable gain amplifiers to keep the incoming signal up at the optimum amplitude for the range of the A/D system. -Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 - KPA3 Duty Cycle Question
Does the KPA3 have plenty of power to allow for 100W full duty cycle operation in all modes? Dwight Agnew - AI4II 9335 King George Dr. Manassas, VA U.S.A. WW4BR arc NoVaQRP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Alinco DM-330MV...
My experience with this PS mirrors Craig's exactly. Seems to be a FB supply in my three years' experience with it. Steve Banks K0PQ ++ I'm using an Alinco DM-330MV switching power supply for my K2 with no problems. It has a control that allows me to move the frequency of any RFI I encounter from the supply, but I've never heard any. Craig NZ0R Sent via BlackBerry from T-Mobile ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Power Poles
From: David Ferrington [EMAIL PROTECTED] For what its worth, I'm switching EVERY 12v cable/device I have to use APPs, including completely replacing the molex style connector on my FT-857, which has proven to be less than reliable after only 3 yrs. My local club (Minnesota QRP club) has standardized on APP's for member rigs. This makes it simpler to mix power supplies from one member with a rig from another. I sincerely hope that the amateur radio world settles on a standard power connector. Now if they would just standardize microphone and TNC connectors as well... Cathy N5WVR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 - KPA3 Duty Cycle Question
Hi Dwight, We may limit power level or maximum TX time for 100% duty-cycle modes (AM/FM/FSK). I can't say for certain, because we're still doing extended transmit tests. We used two fairly large, standard-size fans so they'd run at slow speed in most operating situations. But fans in this size are readily available with higher CFM ratings, so we could offer an extended-duty-cycle upgrade if that were warranted. This would only increase the depth of the fans; you wouldn't have to add fans to the top of the cabinet. In fact the entire fan panel is an upgradeable module -- we wanted to make sure the K3 could adapt to specialized requirements. 73, Wayne N6KR On May 3, 2007, at 3:23 PM, Dwight wrote: Does the KPA3 have plenty of power to allow for 100W full duty cycle operation in all modes? --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
I wonder if CW feedback would be possible as an accessibility feature without the use of the band decoder? Karl NM7N Vic K2VCO wrote: Now if only the K3 would generate CW characters for copy by ear, it would be perfect :-) This is a great idea, Vic. We could certainly buffer incoming PSK31 or RTTY, once decoded, and play it back as audio Morse. Added to the list. 73, Wayne N6KR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Brain vs Hardware filters
I wonder if CW feedback would be possible as an accessibility feature without the use of the band decoder? That would be nice! I'm sure that is something that Elecraft has considered. I've been experimenting with CW and synthesized voice feedback in my K2 rig control software. I'll maybe tie it to key commands so that pressing, say alt-F, would send the active vfo frequency in code, or voice. It sure would be a terrific feature for sight impaired hams. -David W4SMT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Accessibility w/o KRC2?
Yes, this is in the works. Some of our blind customers will be helping us design the accessibility interface. 73, Wayne N6KR On May 3, 2007, at 3:55 PM, Karl Anderson wrote: I wonder if CW feedback would be possible as an accessibility feature without the use of the band decoder? Karl NM7N --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board
Before I solder it, I want to make sure I don't have the wrong capacitors. The table shows C17 C19 as 56, but the components I have are labeled 560J. Do I have the right capacitors in the 15 meter bag? Thanks Joe NE3R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board
An invaluable tool I have found is the Electronics Assistant at: http://www.electronics2000.co.uk/ Simply put in the code, and it gives you the value. Does resistance, capacitance, power, etc. 560J is a 56pf 5% capacitor, so you are correct. Mike AI4NS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joseph M. Durnal Sent: Thursday, May 03, 2007 6:44 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board Before I solder it, I want to make sure I don't have the wrong capacitors. The table shows C17 C19 as 56, but the components I have are labeled 560J. Do I have the right capacitors in the 15 meter bag? Thanks Joe NE3R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board
The confusing issue is that many values shown numerically read like color codes - the last digit is a multiplier. IMX that's true of parts when numbers end in J. So in this case it's 56 and 0 (zero)zeros following, or 56 pF. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joseph M. Durnal Sent: Thursday, May 03, 2007 4:44 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board Before I solder it, I want to make sure I don't have the wrong capacitors. The table shows C17 C19 as 56, but the components I have are labeled 560J. Do I have the right capacitors in the 15 meter bag? Thanks Joe NE3R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] What's a panadapter?
I think a Panadapter is an accessory for your rig so it can double as a cook stove when you are out in the field. Lee, w0vt ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] MD2 and K3 MH2 and K3
Will the Elecraft/Heil MD2 work with the K3? Will the Elecraft/Heil MH2 work with the K3? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KAT-100 completed
Tom, The suggestion from Jim Brown was to replace the cable to the computer with twisted pair cable (CAT-5 will do, but shielded twisted pair is better) Both RXD and TXD should be paired with a conductor going to pin 5 (Signal Ground). If you do not have a computer connected, the computer cable (the RS-232 part of the AUX I/O) is NOT your problem. The AUX I/O signals between the K2 and the KAT100 are usually not a problem. Is the KPA100 mounted on the K2 or in the EC2 enclosure with the KAT100? If you have the KPA100 mounted on the K2, remove the right side panel and dress (fold) the ribbon cable and the speaker cable up into the area above the Control Board. If left to its own resources, the signals on the ribbon cable can couple into the KSB2 board. 73, Don W3FPR Tom Zeltwanger wrote: Just completed and tested a KAT-100 in the EC2 enclosure. Like the K2 and the KPA-100, I turned it on, and everything worked fine. I think I may be seeing some digital noise getting into my K2 from the addition of the outboard tuner. I saw some discussion recently about noise from the RS- 232 cable in the K2. Have others seen any problems with noise when adding the KAT-100? If so, any tips on minimizing or eliminating it? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Alinco DM-330MV...
I agree. One feature I like is that there is a front-panel voltage control which makes it easy to set the output to 13.8-14.2 volts required for charging the KBT2. Bob, N7XY On May 3, 2007, at 3:25 PM, [EMAIL PROTECTED] wrote: My experience with this PS mirrors Craig's exactly. Seems to be a FB supply in my three years' experience with it. Steve Banks K0PQ ++ I'm using an Alinco DM-330MV switching power supply for my K2 with no problems. It has a control that allows me to move the frequency of any RFI I encounter from the supply, but I've never heard any. Craig NZ0R Sent via BlackBerry from T-Mobile ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board
...The table shows C17 C19 as 56, but the components I have are labeled 560J. Do I have the right capacitors There's a very good summary of capacitor marking conventions at: http://xtronics.com/kits/ccode.htm There's some interesting non-obvious conventions to this marking system. Most know that a capacitor marked ABC is equal to AB x 10^C pF. So yours are 56 x 10^0 = 56 pF. Similarly, 562 would be 56 x 10^2 = 5600 pF. So what would 569 be? Not 56 x 10^9 or 560 pF, as you might think, but actually 56 x 0.1 = 5.6 pF. When the third digit is 9 the multiplier is 0.1. When the third digit is 8, the multiplier is 0.01. You'd be surprised how few know that. The J on your caps is the code for the value tolerance in percent. All this is explained on the web site cited above. 73, Mike / KK5f (Sorry this topic isn't about the K3...not!) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Brain vs Hardware filters
Mike Markowski wrote: I was thinking what it would be like to use the psk-cw decoder that Wayne has added to the k3 to do list. Imagine trying to copy this cut pasted snippet of a psk qso just now: Funny Al! :-) Well, I use a store bought dipole. It cost me about $40 on sale and seems to work well - I have it about 25' or 30' up. All those non alphanumerics... Maybe k3 operators will be spotted on psk by their use of mostly alphanumerics and small, cw friendly words! Could be worse :) If you wanted the full character set, you could always connect a small keyboard. We're working on that 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KAT-100 completed
Don, Thanks for the suggestions. At this point I have just the KAT100 in the EC2 enclosure. I do not currently have a PC connected, so it was the AUX connection I was wondering about. I will clean up the ribbon cable and make sure it is not near the KSB2 board. I need to do some more checking to see just how bad this noise really is - it was not that strong but was noticable. When I add the PC I probably will change the cable to something with shielded twiested pairs. 73, Tom KG3V Quoting Don Wilhelm [EMAIL PROTECTED]: Tom, The suggestion from Jim Brown was to replace the cable to the computer with twisted pair cable (CAT-5 will do, but shielded twisted pair is better) Both RXD and TXD should be paired with a conductor going to pin 5 (Signal Ground). If you do not have a computer connected, the computer cable (the RS-232 part of the AUX I/O) is NOT your problem. The AUX I/O signals between the K2 and the KAT100 are usually not a problem. Is the KPA100 mounted on the K2 or in the EC2 enclosure with the KAT100? If you have the KPA100 mounted on the K2, remove the right side panel and dress (fold) the ribbon cable and the speaker cable up into the area above the Control Board. If left to its own resources, the signals on the ribbon cable can couple into the KSB2 board. 73, Don W3FPR Tom Zeltwanger wrote: Just completed and tested a KAT-100 in the EC2 enclosure. Like the K2 and the KPA-100, I turned it on, and everything worked fine. I think I may be seeing some digital noise getting into my K2 from the addition of the outboard tuner. I saw some discussion recently about noise from the RS- 232 cable in the K2. Have others seen any problems with noise when adding the KAT-100? If so, any tips on minimizing or eliminating it? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board
Thanks everyone. I thought it was right, but until now, the value listed in the table matched exactly what was printed on the component. It has been soldered nicely into place. I'm just about finished the filter board! I think, I sure hope I don't mess up the toroidal inductors. 73 Joe NE3R On 5/4/07, Mike Morrow [EMAIL PROTECTED] wrote: ...The table shows C17 C19 as 56, but the components I have are labeled 560J. Do I have the right capacitors There's a very good summary of capacitor marking conventions at: http://xtronics.com/kits/ccode.htm There's some interesting non-obvious conventions to this marking system. Most know that a capacitor marked ABC is equal to AB x 10^C pF. So yours are 56 x 10^0 = 56 pF. Similarly, 562 would be 56 x 10^2 = 5600 pF. So what would 569 be? Not 56 x 10^9 or 560 pF, as you might think, but actually 56 x 0.1 = 5.6 pF. When the third digit is 9 the multiplier is 0.1. When the third digit is 8, the multiplier is 0.01. You'd be surprised how few know that. The J on your caps is the code for the value tolerance in percent. All this is explained on the web site cited above. 73, Mike / KK5f (Sorry this topic isn't about the K3...not!) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Brain vs Hardware filters
Funny Al! :-) Well, I use a store bought dipole. It cost me about $40 on sale and seems to work well - I have it about 25' or 30' up. Hehe... Well, all of those characters *could* be sent in CW - if Wayne put them on the chip (not on the K2, but the - is there :). It would be some wild sounding code. :-) ---...---.--.- -David W4SMT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Yes, that is exactly the point I was trying to make! You can have it as you like it (I am speculating a bit about the control options in the firmware, of course). Some people like a wider width at the first IF to hear signals approaching, even if it opens the window for AGC blocking or desense. Others would want the two passbands to be exactly aligned and as narrow as possible, which would provide the best IMD and AGC performance, but then the signals will drop off the cliff as you tune. What you appear to have done is allow nuance in these adjustments, which I think is quite clever and well thought out. I can't wait to play with it. I didn't mention the audio passband shaping, but that makes it just that much better. Well done. Look forward to seeing you at FDIM. 73, Larry N8LP Lyle Johnson wrote: Hello Larry! ...Therefore, the roofing filter should be termed the passband tuning enabling filter, or PBTE filter ;-) Thankfully, I think Elecraft has done a brilliant job of giving us the options we want without compromises. By tying the DSP bandwidths and PBT functions to the roofing filters, we have the ability to have the combination of 1st and 2nd IF BW we want,,, and with the variable roofing filters, I think we will be able to almost set the relative BWs between the two... allowing a window for PBT or not as we choose. In the olden days, analog radios would use two IF filters and slide them back and forth against each other to form variable bandwidth filters. This may be some of the PBT you were referring to. In the K3, you can set the IF selectivity almost anywhere you like. The conversion oscillator and the DSP's internal software BFO will be moved around to ensure that the narrowest available 8.215 MHz IF filter is selected. The edges of the DSP IF filters and the crystal filter aren't worked against each other. In general, we try to keep the passband of interest centered in the IF filters. The variable-width crystal filters will make this matchup fairly precise :-) Thus we can offer passband tuning without opening up the crystal filter bandwidth wider than required for the ultimate passband chosen by the operator of the radio. Oh, and did I mention we also shape the audio passband according to the filter selection? And that is overlaid with the 8-band Rx EQ? 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Battery ??
Another one of my idle thoughts... Would there be enough room in the space normally occupied by the 100W option to accommodate a battery such as that used in the K2??? Portable QRP/ QRPp...?? Dave KK7SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 8 pole vs 5 pole..I knew this would happen
I thought some rigs also passed the transmit signal out past the filter, and to save money just fit say an FM sized filter there. FM and AM are 'features' also I guess... The K3 is going to relay switch filters in for FM, AM, SSB, and CW. Since they are working at a lower frequency, they will really work well, and that is the main trick going on in the K3. Then you get all those DSP extra goodies... Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry Phipps Sent: Thursday, May 03, 2007 9:12 PM To: Jack Smith Cc: Elecraft Discussion List Subject: Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen I think the term roofing filter is misleading. A narrow filter at the first IF protects a receiver even better than a roofing filter, so there is nothing inherently distortion reducing in using a wider filter at the first IF and then a narrower one later. The ideal situation for IMD would be a pair of matched narrow filters at both IFs. The real reason for a roofing filter it seems to me, is to allow passband or slope tuning. This compromises IMD and AGC performance for the sake of a feature... which may or may not be valuable to the user. Therefore, the roofing filter should be termed the passband tuning enabling filter, or PBTE filter ;-) Thankfully, I think Elecraft has done a brilliant job of giving us the options we want without compromises. By tying the DSP bandwidths and PBT functions to the roofing filters, we have the ability to have the combination of 1st and 2nd IF BW we want,,, and with the variable roofing filters, I think we will be able to almost set the relative BWs between the two... allowing a window for PBT or not as we choose. This is an exciting development, and will be copied by many companies over the next year. Kudos to the design team on this. 73, Larry N8LP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
What is the first thing rain hits when coming down from the sky ? What is the first thing a signal hits after the first mixer coming down from the sky ? What is a leaky roofing filter ? It's what is in the K-3 G since it lets the signal from SOMEBODY through to your ears! Walt K8CV Royal Oak, MI. - Original Message - From: Fred (FL) [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Thursday, May 03, 2007 12:55 PM Subject: [Elecraft] 8 pole vs 5 pole..I knew this would happen I think, still, someone needs to define what a ROOFING FILTER is. Say for sake of argument - I have a passive or active or crystal filter - and it is to be used as a ROOFING FILTER. Why is it called this? Why is the filter itself, called a ROOFING FILTER? And where does the adjective, ROOFING, come into play? .. I'm sure I'm dumb on this one - but would like to learn. Not until the K3 came on the Elecraft scene - did anyone mention or get concerned about the need for ROOFING FILTERS. Now they're all the rage? Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] So, How Many K3 Orders?
Hi! I'm wondering; if order my K3 today (paying half down) will I receive it by Christmas '07? ;=) I seem to recall seeing the question posed, but missed seeing the answer; how many K3s does Elecraft expect to be producing/delivering each month? - Paul __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
On Thu, 3 May 2007, Lyle Johnson wrote: In the olden days, analog radios would use two IF filters and slide them back and forth against each other to form variable bandwidth filters. This may be some of the PBT you were referring to. Being as technically adroit as your average cow pie, all of this is over my head. I have a TR7 sitting here that has something called PassBand tuning. I recall that I used it, with one of those ancient, non-digital, I didn't build it Autek filters. I have memories of twisting many knobs to get rid of the crud, and either notching out noise or peaking the signals that were down in the mud, even lower than the bottom dwellers and scum suckers. Given that I hardly ever, but maybe now and then operate SSB, and would like to try other digital modes, what would suggest as a reasonable approach to filters? Thanks Thom, who finds ordering from a Chineese Menu easier than this filter stuff...and only has first hand knowledge of leaky roofs, which he doesn't believe is an official option for a K3. Thom www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Re: Brain vs Hardware filters
Well, in commercial CW we routinely used such things as parenthesis (-.--.) open, (-.--.-) close, dollar sign (...-..-), apostrophe (..), colon (---...) semicolon (-.-.-.). A symbol that I believe was added -or became popular- much more recently than when I took the commercial test was the @ (.--.-.) to facilitate sending e-mail addresses. So why not use them? Toward a better vocabulary in any language... Ron AC7AC (...-.-) -Original Message- Hehe... Well, all of those characters *could* be sent in CW - if Wayne put them on the chip (not on the K2, but the - is there :). It would be some wild sounding code. :-) ---...---.--.- -David W4SMT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 Improvement Ideas
On Apr 28, 2007, at 12:45 PM, wayne burdick wrote: Please send me directly any suggestions for K2 improvements. I maintain this list, prioritizing task items based on the needs of current and future K2 owners. OK, you asked for it I'm certainly going to buy a K3, when I can afford it, which may be a while. I do have several suggestions for the K2, which is going to remain a very fine and capable radio: Firmware Only Enhancements: 1) RTTY Mark Frequency Display. Like the CW mode displays the frequency of the received CW signal, the RTTY mode ought to display the frequency of the Mark signal. A menu option would be needed to set the frequency of the Mark signal. (This would essentially subtract or add the Mark frequency from the LSB/USB carrier frequency, respectively) 2) Option for VOX to toggle VOX on / off only. Delay is set in a menu option. (Beats having to cycle through all delay times to turn on / off, which I do frequently) 3) Menu settings for default tuning rate for each mode (CW, USB/LSB, RTTY). I currently find myself constantly switching between 10 Hz and 50 Hz whenever I change modes. 4) Unified Filters - Have three or four filter presets for each mode that are combinations of an XFIL and DSP setting values. Allow one button (such as XFIL) to cycle through the presets. This would allow easier manipulation of the two sets of filters, rather than having to tap and hold the same button to get things in sync. (Made even harder because you can't see which filter is currently selected) 5) IF Shift - replace XIT mode with IF Shift. RIT takes priority over the control if on. Either that, or control IF Shift with the Keyer speed control (at least in USB/LSB, RTTY). Or perhaps hold down XIT and rotate tuning dial. 6) Option to flip CW sidebands on 15m and up so tuning direction stays the same. 7) Computer command to set the contents of the CW memories -- so you can program them from a PC program and then run them from the front panel. 8) New INP mode that would allow PTT on the dot line and CW keying on the dash line for contesting work. (No auto-detect of hand keying in this mode) 9) Have a mode for variable rate tuning -- normal tuning is one step at a time, but as you turn the knob faster, the tuning rate increases so long as you tune quickly. (A similar technology is used to accelerate mouse movement and has been on the Mac for over two decades) 10) Option for one-touch selection of Tuner AUTO/CAL (eg out) selection. This would allow one to easily switch the tuner on and off. Hardware Improvements: 1) Improved KSB2 module -- filter with sharper skirts (better than 1.5 shape factor), more (6-10 dB) mic gain available, more positive VOX (using separate VOX amplifier), anti-VOX circuitry. 2) Improved KNB2 -- allow selection of longer blanking times, more thresholds, better blanking action. 3) PFx Module -- teeny little module that has four (or so) buttons. Hooks into AUX line and offers access to eight functions of the K2 (four for tap, four for hold) Obviates the need for FPLY, opens the K2 up for easier access to things like switching filter presets, noise reduction modes, RIT clear. Lots simpler and cheaper than the KRC2 because it is just the buttons. (Might also be useful for the K3) 4) Remote Tuning Knob -- borrow the idea from Ten-Tec. Perhaps part of PFx module. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Brain vs Hardware filters
On Thu, 3 May 2007, wayne burdick wrote: Mike Markowski wrote: I was thinking what it would be like to use the psk-cw decoder that Wayne has added to the k3 to do list. Imagine trying to copy this cut pasted snippet of a psk qso just now: Funny Al! :-) Well, I use a store bought dipole. It cost me about $40 on sale and seems to work well - I have it about 25' or 30' up. All those non alphanumerics... Maybe k3 operators will be spotted on psk by their use of mostly alphanumerics and small, cw friendly words! Could be worse :) If you wanted the full character set, you could always connect a small keyboard. We're working on that In the mean time, I'm thinking of making a USB keyboard - paddle interface. Why? Because. :) -- Hisashi T Fujinaka - [EMAIL PROTECTED] BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K2 Improvement Ideas
Great list, Bill -- thanks! Wayne On May 3, 2007, at 8:32 PM, Bill Coleman wrote: On Apr 28, 2007, at 12:45 PM, wayne burdick wrote: Please send me directly any suggestions for K2 improvements. I maintain this list, prioritizing task items based on the needs of current and future K2 owners. OK, you asked for it --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Yes, that is exactly the point I was trying to make! You can have it as you like it (I am speculating a bit about the control options in the firmware, of course). Some people like a wider width at the first IF to hear signals approaching, even if it opens the window for AGC blocking or desense. Others would want the two passbands to be exactly aligned and as narrow as possible, which would provide the best IMD and AGC performance, but then the signals will drop off the cliff as you tune. What you appear to have done is allow nuance in these adjustments, which I think is quite clever and well thought out. I can't wait to play with it. One other feature you're sure to like, then, is the CW context or PB2 filter. Set this one as wide as you like -the crystal filter selection will be driven by this. Then set a suppression level maybe down 10 or 20 or 30 dB. Overlay this with the narrow filter you want and presto! You can hear the context from nearby stations, but at reduced amplitude, while the signals in the narrow filter you are working (or trying to work :-) are emphasized and drive the AGC level. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8 pole vs 5 pole..I knew this would happen
Given that I hardly ever, but maybe now and then operate SSB, and would like to try other digital modes, what would suggest as a reasonable approach to filters? I'd start with the default 2.7 kHz filter. It'll handle the new, wider digital modes like Olivia, and handle SSTV and digital voice, for example. If you operate mostly CW or mostly narrow digital modes, I'd add the 400 Hz or 500 Hz filter. Then operate the radio for a while and see what else you'd like/want/need. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
