Re: [Elecraft] Mechanical bug contact bounce
Every several seconds you experience a scrambled dot and it sounds like dirty or misadjusted contacts. Aloha, Bryce - Original Message - From: "WA6L" <[EMAIL PROTECTED]> To: Sent: Monday, September 15, 2008 9:30 AM Subject: Re: [Elecraft] Mechanical bug contact bounce Interesting stuff, Briyce! I have been using my Blue Racer on the K3 and have heard the occasional erratic dot. I thought it might be dirty contacts (it's an old bug). What were you hearing that made you come up with the fix? The odd dot that I hear is not repeatable and not regular. Aloha and 73, John, WA6L (ex AH6CL) Bryce A. Carr-2 wrote: To get rid of the "dot" contact bounce, erratic sounding dots, that I experienced I put a .22 microfarad across the keyline on K3 side of keyline and a 10K resistor in series with the key line on the bug side of the keyline. On a 2nd receiver my two bugs now sound like a electronic keyer. If you use a bug on the K2 you can try a 3300 ohm. Aloha, Bryce, kh6at ___ 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 -- View this message in context: http://n2.nabble.com/Mechanical-bug-contact-bounce-tp1089559p1091147.html Sent from the Elecraft mailing list archive at Nabble.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] K3 Noise Blanker
With over 200 on 160 from this 80 ft. wide city lot I take a real interest in noise blankers. A few days ago my friend gave me his K3 kit to build for him. s/n 1487 2.21 firmware with 2.7khz, 1.0 khz, .400 khz filters. His 2nd rx still on order. Tonight I have it together except for the 100w amp and this evening I was playing qrp and listening to OHR that covered most all of the 40m band and was peaking S9 with my gp ant on 7.070 mhz with 2 khz bandwidth selected. As expected, the NR button was of slight help with this terrible racket in the audio line but the NB button completely removed it with no reduction in desired audio level. Completely, I mean 100% The S meter dropped from S9 to my normal KH6 40m noise floor of S5. No trace of it heard with the other filters either. My K3 is on order. Congrats to Elecraft. Aloha, Bryce, kh6at ___ 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] Question about KNB2 Noise Blanker
Partial repeat of Marinos Markomanolakis, M.D. 2 Jan/05 > For a receiver of the K2 caliber, I believe, it is worth every penny and > construction effort, even if it means incorporating a "pre-made" surface > mount module for the NB in order to improve on the NB area which seems to be > suboptimal. > For example an "expensive and/or difficult to build" but optimized NB module > will be FAR more desirable and effective feature in a real world Rx > performance improvement rather than a similar DSP module that is already > available from Elecraft. > > These are my $.02 opinion about the NB, which may be the only area that > needs some improvement in a radio that has no equal in the market today. And > can definitely make a difference for people wanting to have a K2 as their > only/main rig in a urban QTHas most of us live. > > 73, > Marinos, ki4gin Excellent Marinos. Thats what I wanted to say! I am using my K2 as my main rig due to it's excellent features except when I must switch due to city noise. I do, of course, have a variable gain preamp that I built for my 80/160 phased loops that in turn feeds my K2 so I have plenty of rf at the blanker input.and the scope confirms it. There is nothing wrong with the blanking pulse widths. This low level city hash is simply not triggering the blanking mv due to other blanker problems. With my old Kenwood TS-140S and other rigs I typically see a 3 S unit drop in a S4 city noise floor and the weak ones jump out of it. We 160m noise eaters would buy a good RF noise blanker even if the box was twice the size of the K2. Aloha, Bryce, kh6at > > > ___ > 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] Question about KNB2 Noise Blanker (Gain reductioninNB2 posit...
Hi Don, I agree, but as Mike, KK5F, pointed out, and I also noticed with my old TS-830S and TS-140S, when using the same receive only phased loops both of those rigs work fine at that low level and the K2, even with K2 preamp on, doesn't. It would be a better idea to put more gain in series with the NB pulse amp and put a nb level control on it so it will work as well as the antique gear. I have dxcc on 160m from a city lot and noise blankers are a big thing in my life. Hi. Aloha, .Bryce, kh6at - Original Message - From: "W3FPR - Don Wilhelm" <[EMAIL PROTECTED]> To: "Bryce A. Carr" <[EMAIL PROTECTED]>; "Mike Morrow" <[EMAIL PROTECTED]>; Sent: Friday, December 31, 2004 1:14 AM Subject: Re: [Elecraft] Question about KNB2 Noise Blanker (Gain reductioninNB2 posit... > Bryce, > > Certainly, when the noise pulse is not strong enough to reach the gating > threshold, no blanking will occur. > The solution is to add a preamplifier. In some cases it will be sufficient > to just turn on the preamplifier in the K2, it does depend on the Rx antenna > output level. > > Any gated noise blanker will have similar behavior, it is not unique to the > K2 implementation. > > 73, > Don W3FPR > > - Original Message - > > > Amen! The K2 NB is particularly poor when using low level rx only ants as > > noise pulses are heard in audio, but are not adequate strength to trigger > > the blanking mv. > > Aloha, > >Bryce, kh6at > > > ___ 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] Question about KNB2 Noise Blanker (Gain reduction inNB2 posit...
Amen! The K2 NB is particularly poor when using low level rx only ants as noise pulses are heard in audio, but are not adequate strength to trigger the blanking mv. Aloha, Bryce, kh6at - Original Message - From: "Mike Morrow" <[EMAIL PROTECTED]> To: Sent: Thursday, December 30, 2004 6:43 AM Subject: Re: [Elecraft] Question about KNB2 Noise Blanker (Gain reduction inNB2 posit... > Stewart wrote: > > >No loss of signal when switching in my NB, but it is very selective > >on what type of noise it blanks. > > The very simple noise blankers of the K1 and K2 seem to help only on ignition, motor commutator, and other such similar noise. These blankers seem completely ineffective on all of the various types of power line noise I've encountered, unlike the more sophisticated blankers in most other rigs produced in the past 25 years. The blankers in my ancient 22-year-old TS-430 and 11-year-old TS-50 work wonders in comparison. > > Maybe it's time for a re-design of the Elecraft blanker system. > > 73, > Mike / KK5F > > > ___ > 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
