Re: [Elecraft] KX3: CM500 best price/use with
I have found the best headset to be the RadioSport that has interchangeable mics to use with my Elecraft and Flex 6xxx series radios.73, Fred/N0AZZ Original message From: Michael Walker Date: 11/11/17 9:07 PM (GMT-06:00) To: Bob McGraw K4TAX Cc: "Elecraft@mailman.qth.net" , j...@kk9a.com Subject: Re: [Elecraft] KX3: CM500 best price/use with I have used the Koss SB40 as well, but I think you will find there is no high end on the Mic and you really have to do some EQ work to make it sound normal. 73, mike va3mw On Sat, Nov 11, 2017 at 5:32 PM, Bob McGraw K4TAX wrote: > I use the Koss SB-40 which has a dynamic mike. No bias needed. > > Bob, K4TAX > > > Sent from my iPhone > > > On Nov 11, 2017, at 3:51 PM, wrote: > > > > I was also confused by the posts that the CM500 works best with bias off. > > Thanks for explaining why this works only with the KX3/KX2. > > > > John KK9A > > > > > > Don Wilhelm wrote: > > Sat Nov 11 10:23:55 EST 2017 > > > > Yes, all electret microphones must have bias applied in some manner. > > I am not certain why you think this is a KX3 "problem". > > The tip and ring connected together is a characteristic of all > > microphones intended primarily for computer use - and the Yamaha CM500 > > is one of those. The ham microphones normally have a mono plug, and do > > not apply, although with mono plugs, MIC BTN must be turned off in the > > KX3/KX2 so that PTT is not activated when the mic plug is inserted (the > > shell grounds the PTT ring). > > The normal computer jack applies bias to the ring, not the tip. > > In the KX3, there is residual voltage from the MIC BTN circuit applied > > to the ring even with MIC BTN turned off - the combination of the tip > > and ring connected together and the residual voltage from the mic button > > circuit in the KX3/KX2 is why it works that way. > > > > That is true of both the KX2 and KX3 - yes, it does not apply to the > > K3/K3S which has no connection to the ring contact in the jack. > > > > So not a "problem", it is just the way things work. > > > > 73, > > Don W3FPR > > > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to rmcg...@blomand.net > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to va...@portcredit.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500 vs New 1500 watt amp
Very competitive price for the quality of amp. 73,Fred/N0AZZ Original message From: Wayne Burdick Date: 4/21/17 12:00 PM (GMT-06:00) To: Fred Smith Cc: Roy Koeppe , Elecraft Reflector Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp Hi Fred, $5995, complete with internal ATU and external, lightweight switching power supply. See: http://www.elecraft.com/KPA1500/KPA1500.htm I might point out that only Elecraft offers a legal-limit amp with a palindromic price tag :) 73, Wayne N6KR > On Apr 21, 2017, at 9:56 AM, Fred Smith wrote: > > Wayne I'm a bit late on this thread but will the cost be in the $5-6K range? > > > 73, > Fred/N0AZZ > K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100 > P3/SVGA--KAT500--W2 > Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G > 300+w--(2) B-5016-G's 165w 2m > > > > -Original Message- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne > Burdick > Sent: Friday, April 21, 2017 11:31 AM > To: Roy Koeppe > Cc: Elecraft Reflector > Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp > > Our philosophy at Elecraft is to cover both ends of the spectrum. > Figuratively speaking. > > When the bands are open, the birds are singing, and the sun is shining, > you’ll find us outdoors using a hand-held KX2 at 10 watts with a whip. But > late at night, when propagation is in the tank and that rare DX station peeks > over the horizon for a once-in-a-lifetime fleeting moment, seconds count and > size really does matter. At these times, we flip the big switch. > > Wayne > N6KR > > > >> On Apr 21, 2017, at 9:02 AM, Roy Koeppe wrote: >> >> >> Aboot: >> >> "And the reason you "need" the extra 1000 W is that the others in the >> pileup are all running max power. A typical arms race, with tempers >> to match." >> >> >> Apparently none of you here ragchews on 80M CW roundtables at sunrise times >> during spring/summer thunderstorms seasons across the country! That's the >> reason QRO was born... >> >> 73, Roy K6XK Iowa >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net Please help support this email >> list: http://www.qsl.net/donate.html Message delivered to >> n...@elecraft.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Message > delivered to m...@totalhighspeed.com > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] QSLs
Well said Jim. 73,Fred/N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Jim Brown Date: 7/25/16 1:49 PM (GMT-06:00) To: elecraft@mailman.qth.net Subject: [Elecraft] QSLs On Mon,7/25/2016 11:34 AM, stan levandowski wrote: > On my QRZ page it says "No LoTW, no eQSL and no Buro." That may be your preference, but it causes everyone who wants a confirmation from you to spend money with the postal system. When we were kids, it cost a penny or two to send a QSL. Now, including the cost of printing a card, it costs someone who wants your card more than $1 round trip (.49 each way) in the US, more than $2 between US and Canada, average $3.50 to/from other countries. LOTW and eQSL are FREE and easy to use if you're using almost any of the popular logging software. Putting our logs on LOTW is the considerate thing to do. It's the RIGHT thing to do. It's the modern equivalent of what we said in the '50s -- "the last courtesy of a QSO is a QSL." Now, the last courtesy of a QSO is an upload to LOTW. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] New Product Idea - 2 Meter
I agree 100% with you and would be a buyer, but Eric closed this thread. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Jeff Cathrow Date: 10/15/2015 11:43 AM (GMT-06:00) To: Elecraft Digest Subject: Re: [Elecraft] New Product Idea - 2 Meter I really like the idea of an "Elecraft 736R" deluxe version that would cover all the bands from 6M, 2M, 135cm, 70cm to 903 and 1296mHz without the complications of outboard transverters, and sequencers. Imagine! "Introducing the satellite-capable Elecraft KV/U3S; MSRP $2595 kit/$2950 factory-built" (realistically, we must make this a totally worthwhile business venture for Wayne and Eric in order to gain their attention first and foremost). Put it in a proper (K3S) size enclosure, give it all-mode capabilities and decent power---at least 10 watts on the highest bands. While this idea may not seem worthwhile or feasible at first; just imagine the commotion it would make in the amateur radio market. Such a revolutionary rig would totally re-invigorate an otherwise dormant segment of amateur radio and give new Technician class hams a great rig with many bands to experiment with and enjoy. All of these VHF and above bands are not so affected by the sunspot cycle so many could enjoy another realm of DXing, contesting, rag-chewing as well as emergency communications if the need arose at any time. I got my ticket in 1996 just so I could chase DX on 6M. I had so much fun and success on 6 (and 144, 222, 432 and 1296 later on) that it wasn't until 2010 that I upgraded my ticket so as to enjoy HF as well. With the K3S Elecraft has now taken HF rigs about as far up the refinement ladder towards perfection as is possible; now it is time to advance the state-of-the-art in the VHF-UHF and microwave arena and get things rolling there again. If you build a freeway in the middle of nowhere it won't be long before it fills up with traffic; thus I bet dollars to doughnuts that a KV/U3S rig would sell like virtual hotcakes and its presence would stimulate a return to the extra short waves in no time at all. I propose that Elecraft put a poll on their website where we could be counted as potential purchasers for such a rig. I'm sure there's a lot of us diehard VHFers that would hock our grandmothers to purchase one if it ever came to reality! Hope this idea takes root in Aptos. Optimistically, Jeff, NH7RO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: VHF radio in Tesla Model S
Al I agree nothing going to replace my diesel 4x4's in my life time electric that will do the work they do. We have 4 4x4's for work and DD trucks and SUV's would not exchange any for electric if it was free. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Al Gulseth Date: 10/06/2015 3:12 PM (GMT-06:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: VHF radio in Tesla Model S First, I've been intrigued by electric powered vehicles for a long time. I came very close to buying a Jet Electrica (?) Ford Escort conversion back in the 1980s and have also followed the "homebrew" versions in Home Power mag. However, I'm not a big fan of using tax dollars to promote a particular technology. A better way IMHO would be to get private venture capital behind some of the engineering students who've been involved in Sunrayce (AKA American Solar Challenge) and just get out of the way to see what they can come up with. (Like Wayne and Eric back in the NorCal days?) Also, while Tesla apparently has licked some of the issues, other manufacturers have not. I've only personally seen a few of a well-known US auto manufacturer's recent attempt at an EV. Both of the following were on the interstate: in one case where the terrain is fairly level (at least for western Arkansas) the vehicle was in the right lane running somewhat below the speed limit. In the other case, the vehicle was on the long grade going up the hill to the tunnel (yes, we have a tunnel through the top of a mountain in NW Arkansas!) It was in the right hand lane with its flashers on and was running slower than a lot of the 18 wheelers on that stretch. The expression on the driver's face was very revealing: I'll just say that he didn't appear to be a... ummm... "happy camper" Just my $0.02 worth. 73, Al On Tue October 6 2015 1:17:30 pm jim wrote: > And the other side: > > Our columnist Bret Stephens writes that at the President's Friday press > conference, Mr. Obama described alternatives to his Syria policy as > "mumbo-jumbo," "half-baked ideas," and "as-if" solutions. "So it is with > this president. It's not enough for him to stake and defend his positions. > He wants you to know that he thinks deeper, sees further, knows better, > operates from a purer motive. His preferred method for dealing with > disagreement is denigration," > > Jim > W6AIM > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne Burdick > Sent: Tuesday, October 6, 2015 11:01 AM > To: mfsj > Cc: Barry; elecraft@mailman.qth.net > Subject: Re: [Elecraft] OT: VHF radio in Tesla Model S > > IMHO the current Tesla is a transitional vehicle on the way to inexpensive > cars powered by graphene ultra capacitors instead of Li-ion batteries. > POTUS see the future and is moving things along in that direction :) > > Wayne > > On Oct 6, 2015, at 10:56 AM, mfsj wrote: > > But the POTUS gives rebates to the buyers and backing to the CO. > > > > Fred N0AZZ > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jbol...@outlook.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to wb5...@centurytel.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: VHF radio in Tesla Model S
But only the rich can afford to buy or get rebates on cars like those. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Wayne Burdick Date: 10/06/2015 1:00 PM (GMT-06:00) To: mfsj Cc: Barry , elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: VHF radio in Tesla Model S IMHO the current Tesla is a transitional vehicle on the way to inexpensive cars powered by graphene ultra capacitors instead of Li-ion batteries. POTUS see the future and is moving things along in that direction :) Wayne On Oct 6, 2015, at 10:56 AM, mfsj wrote: > But the POTUS gives rebates to the buyers and backing to the CO. > > Fred N0AZZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: VHF radio in Tesla Model S
But the POTUS gives rebates to the buyers and backing to the CO. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Wayne Burdick Date: 10/06/2015 12:41 PM (GMT-06:00) To: Barry Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: VHF radio in Tesla Model S Neither Elecraft co-owner has a Tesla, nor are we likely to get them anytime soon, speaking strictly for both of us. I drive a very pragmatic Honda CRV and am coveting a Prius V for its better gas mileage. I prefer not to drive at all, actually. I have a hybrid mountain bike that runs on the equivalent of approx. 0.5 McChicken sandwiches per hour. As for any engineer rumored to own a Tesla: Who am I to comment on whether they should raid their retirement nest-eggs to buy overpriced, overpowered, conspicuously consumptive, middle-age-postponing sports sedans? (Isn't the 'T' for Testosterone, something always in short supply? Might a Tesla be partially covered by the prescription drug clause in one's medical insurance?) Finally, regarding the mobile radio: Go for it. Driving a Tesla, you may very well find yourself outside the cellphone network and many miles from that elusive next charging station. Wayne N6KR On Oct 6, 2015, at 9:38 AM, Barry wrote: > I'm aware of a few Elecraft engineers and owners having a Tesla Model S, > hence the post. > > When I first got my Model S, I had no plans to put a 2m radio in it. Now > I'm having second thoughts. Wonder if any Model S owners have installed a > radio? > > Feel free to contact me off list at my callsign at arrl.net, if you prefer. > > Tnx, > Barry W2UP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] experience with CW and settings
Ken I had the same problem several yrs. ago on my farm. It was a transformer I called the CO OP ant shaped it out for me, no more noise now one S Unit To 2 at the most. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Ken Date: 09/25/2015 8:26 PM (GMT-06:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] experience with CW and settings Phil, don't assume rural areas are quiet! I sometimes have S9+ power line noise and we are rural (internet and TV via satellite) , nearest neighbor is a half mile away and down over the hill. I've traced the noise to the power line feeding the farm (main breakers off, K3 running on battery.) Ken WA8JXM On 9/25/15 12:41 PM, Phil Anderson wrote: > I live in a suburban area so my noise level is high for 40 and 30 > meters compared to those lucky folks living in rural areas. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Four Elecraft Digests in one day
My thoughts exactly. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Jim Lowman Date: 09/20/2015 6:53 PM (GMT-06:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Four Elecraft Digests in one day And how many messages has this comment spawned, for those of us who aren't on digest mode? Talk about cluttering the list! 73 de Jim - AD6CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Product Suggestion - 500W Dummy Load
Very true my main HF amps are like that both Alphas an 87A and a 9500. Other amps like my KPA500, Yaesu 1000 series SS units are fine to tune at low power. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Edward R Cole Date: 09/18/2015 6:14 PM (GMT-06:00) To: ae...@carolinaheli.com, Elecraft@mailman.qth.net Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load Jerry, Certainly its appropriate to tune your antenna tuner at low power. I have an "ancient" Drake MN-2000 which is rated for 2000w PEP but I can tune it with 10w from my K3/10 with my linear off. Then I turn on my station control panel which enables PTT to the amp. Lately been using my AN-762 140w amp from CCI which I drive to about 120w with 5.6w. http://www.communication-concepts.com/140-watt/ I set the tuner on the 200w range to measure fwd and ref power. Sometimes I will touch up the tuner with the amp online as the amp and K3 are separated by 8-foot of coax and that appears to affect tuning (a little). But that only takes a couple seconds. Marking down cap settings for favorite frequencies is a good idea. But tuning a high-power tube amp at greatly lowered output does not work. Because the internal impedance of the tube shifts as anode current rises. My 8877 is about 5500-ohms at 1400w so you need to adjust it at working voltage and current. Input impedance changes radically from 100w to 1300w. So, unless you run high-power tube amps, you probably can get away with tuning the antenna on low power. Situation changes if you are using a sspa instead of tubes. 73, Ed - KL7UW At 10:16 AM 9/18/2015, ae...@carolinaheli.com wrote: >Forgive me in advance if this is a stupid question. > >Is there any reason you have to tune at full power? It seems to me that >tuning can be accomplished easily with much lower power. The same thing goes >for the ATU to the antenna. I don't see why we need more than a few MW at >most for the ATU to Antenna link. > > > >Rightly or wrongly when I was in the hobby the first time I ran a TS-850 >into an SB-220 to an MFJ roller tuner connected to an antenna switch >feeding: 80m inverted V, 30m/40m rotatable dipoles, and a triband beam. >Whenever I tuned on the inverted V or outer band limits of where my antennas >where tuned I ended up putting labels on the ATU on cap position and a >number/clock combo that represented a roller inductor position for each band >area I cared about. It ended up I rarely had to tune up anything one the air >because I knew where the antenna tuning was using just the Rig and ATU; >tuned the APM into a paintcan MFJ load then switch it inline. I was all set >and never had issues when I needed to kick in the horses. > >Now my debate is 500w vs 800w... there's a larger difference between 500w >and 800w than between 800w and 2.5kw signal wise if I understand >correctly... > > >Jerry Moore >AE4PB, K3S - S.N. 010324 > > > >-Original Message- >From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward >R Cole >Sent: Friday, September 18, 2015 2:00 PM >To: Elecraft@mailman.qth.net >Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load > >Don't have much to say: > >Had a Cantenna from Heath in the 60's - knocked over; spilt mineral oil on >the floor, threw can away! > >I have acquired "dry" loads over the years rated into UHF and sometimes to >mw at flea markets and swaps. My highest power load is 500w Sierra with >power meter and switch for 150 or 500w (probably good to 1000-MHz). Have a >couple Bird terminations rated 50w. Most can handled double their rating >for short duration. > >The hardest duty on my loads is when optimizing the output of a new unit >where I'm keyed up longer than I should. > >But I do have a question on how adjusting a tuner into a 50-ohm load saves >one from transmitting a signal once the tuner is connected to an antenna >that may not be 50-ohms. On 600m my inverted-L is Z = 0.8 >+j680. Tuning into a 50-ohm load does nothing to help match the >antenna. The amplifier is solid state with input and output transformers >(no adjustment). > >I think, unless you use a high power tetrode or triode, that no one tunes >amplifiers anymore. Solid state amps are broadband and need LP filters to >keep from amplifying harmonics. BTW my 2m-8877 is capable of 2000w* RF >output so pretty hard to find a dummy load to take that. Fortunately the >amp does not change much so very little tuning is ever needed (of course I >am on a small segment of one band about 200-KHz wide). Of course the answer >is to tune antenna at lower power and hope the High Power amp will always be >looking at 50-ohms. > >I do not have a QRO 2m antenna tuner but the antenna SWR < 1.25 so only the >anode tuning needs a light adjustment occasionally (loading has not be >adjusted for 8 years). My "dummy load" has 19.2 dBd gain and radiates well. > >*I operate at 1365w CW which allo
Re: [Elecraft] Product Suggestion - 500W Dummy Load
I can tell you this there is a world of difference between 800w and 2.5k or even 1.5k for that matter. I am in 0 land and very hard to break the coasts on a good day at times so a little extra helps break those pile ups. Fred N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: ae...@carolinaheli.com Date: 09/18/2015 1:16 PM (GMT-06:00) To: 'Edward R Cole' , Elecraft@mailman.qth.net Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load Forgive me in advance if this is a stupid question. Is there any reason you have to tune at full power? It seems to me that tuning can be accomplished easily with much lower power. The same thing goes for the ATU to the antenna. I don't see why we need more than a few MW at most for the ATU to Antenna link. Rightly or wrongly when I was in the hobby the first time I ran a TS-850 into an SB-220 to an MFJ roller tuner connected to an antenna switch feeding: 80m inverted V, 30m/40m rotatable dipoles, and a triband beam. Whenever I tuned on the inverted V or outer band limits of where my antennas where tuned I ended up putting labels on the ATU on cap position and a number/clock combo that represented a roller inductor position for each band area I cared about. It ended up I rarely had to tune up anything one the air because I knew where the antenna tuning was using just the Rig and ATU; tuned the APM into a paintcan MFJ load then switch it inline. I was all set and never had issues when I needed to kick in the horses. Now my debate is 500w vs 800w... there's a larger difference between 500w and 800w than between 800w and 2.5kw signal wise if I understand correctly... Jerry Moore AE4PB, K3S - S.N. 010324 -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward R Cole Sent: Friday, September 18, 2015 2:00 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load Don't have much to say: Had a Cantenna from Heath in the 60's - knocked over; spilt mineral oil on the floor, threw can away! I have acquired "dry" loads over the years rated into UHF and sometimes to mw at flea markets and swaps. My highest power load is 500w Sierra with power meter and switch for 150 or 500w (probably good to 1000-MHz). Have a couple Bird terminations rated 50w. Most can handled double their rating for short duration. The hardest duty on my loads is when optimizing the output of a new unit where I'm keyed up longer than I should. But I do have a question on how adjusting a tuner into a 50-ohm load saves one from transmitting a signal once the tuner is connected to an antenna that may not be 50-ohms. On 600m my inverted-L is Z = 0.8 +j680. Tuning into a 50-ohm load does nothing to help match the antenna. The amplifier is solid state with input and output transformers (no adjustment). I think, unless you use a high power tetrode or triode, that no one tunes amplifiers anymore. Solid state amps are broadband and need LP filters to keep from amplifying harmonics. BTW my 2m-8877 is capable of 2000w* RF output so pretty hard to find a dummy load to take that. Fortunately the amp does not change much so very little tuning is ever needed (of course I am on a small segment of one band about 200-KHz wide). Of course the answer is to tune antenna at lower power and hope the High Power amp will always be looking at 50-ohms. I do not have a QRO 2m antenna tuner but the antenna SWR < 1.25 so only the anode tuning needs a light adjustment occasionally (loading has not be adjusted for 8 years). My "dummy load" has 19.2 dBd gain and radiates well. *I operate at 1365w CW which allows for about 9% variance in meter accuracy to stay legal. 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to je...@carolinaheli.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.
Re: [Elecraft] Elecraft SP3 External Speaker details
OMG OM cheap at twice the price 8>) Fred/N0AZZ Sent via the Samsung Galaxy S6 edge+, an AT&T 4G LTE smartphone Original message From: Mike Reublin NF4L Date: 09/14/2015 6:11 PM (GMT-06:00) To: Cliff Frescura Cc: Elecraft List Subject: Re: [Elecraft] Elecraft SP3 External Speaker details I can't imagine what makes it cost that much. Too rich for my anemic blood. 73, Mike NF4L > On Sep 14, 2015, at 4:24 PM, Cliff Frescura wrote: > > Didn't ask. But the web site lists the SP3 at $179 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to m...@totalhighspeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com