Re: [Elecraft] Colour Codes
Better be right, or your great big venture goes west! (remembered from the 60's when I was learning this stuff) 73 de N7BNT - Doug On Apr 9, 2005 9:41 PM, Stephen Brandt <[EMAIL PROTECTED]> wrote: > Bad boys race our young girls, but violet grey wins. ___ 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] Cheap 12VDC Portable Power
Greetings all, I just received a mailing from Surplus Computers which is advertising a 12V Auto JumpStart and Air Compressor for $19.99. On closer look, this appears to be exactly the same unit I have (purchased at Costco a year ago for around $60) for portable ops. It contains a 17.5Ah SLA battery, a light, an AC trickle charger, a cigarette-lighter style DC adaptor, a DC-DC charging cord (for plugging into your car), an air compressor with hose and jumper cables! I hacked mine with leads directly to the battery inside and terminating to PowerPole connectors (yes, I have drunk the PowerPole Kool-Aid and it was good!) and take a West Mountain 5-way DC power strip with me to park picnic tables. This is a killer deal for 20 bucks (plus shipping on 23 lbs). Heck, I think for the price you could remove the SLA battery and throw the rest away if you wanted to. Hint: the AC trickle charger is pretty much useless... a few hundred mA takes days to recharge a 17.5Ah battery... I use an A&A Engineering 1A charger to charge it up when I get home... usually overnight does it. Here's the link: http://www.surpluscomputers.com/store/main.aspx?p=ItemDetail&item=TOL10130 I have no idea how long their "sale" price is good for. 73 de N7BNT - Doug Disclaimer: I have absolutely nothing to do with this company except as an occasional customer! ___ 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] Resistor Color Code Guide
Black Brown Red Orange Yellow Green Blue Violet Grey White Better Be Right Or Your Great Big Venture Goes West -de N7BNT Doug Thom R Lacosta wrote: On Sat, 9 Apr 2005, Sandy wrote: Color code is easy! Remember the rhyme we learned in radio school: Bad Boys Rape Our Young Girls But Violet Gives Willingly! May not be Politically Correct! craft.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] OT: wanted - iambic paddles for new ham
Greetings everyone, My 13-year-old son got his ticket last week (KE7DMK) and is quickly learning - and liking - CW. I built him a little memory keyer to practice with, but he is in need of paddles to use with it. If you have an old and/or spare pair of paddles that you would part with free or cheap (he is on the 50/50 plan with me, I pay half, but his half could be an obstacle at the moment), please contact me off-list. Thanks & 73, Doug N7BNT ___ 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] Is it possible to monitor digital transmissions.
Hi Jerry, I can't imagine running PSK without PSKmeter (http://www.ssiserver.com/info/pskmeter/). After reading about it in QST last February, I ordered and built the kit. PSKmeter is a essential one-trick-pony for PSK ops. Very neat. I have built and use 2 of them. There is also another product out there "IMD Meter" out there, but I have never seen or used one. Seasons greetings to all, Doug N7BNT -- On Dec 17, 2004, at 5:55 AM, n2uz wrote: I am new to my K2 , #4472, and would like to know if it is possible to monitor my digital transmissions. On CW I can hear what I am sending, but not on PSK, rtty and Hell modes. Is that normal. Thanks in advance to all who respond. ___ 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] Blown ammeter question used with KX1/gelcell/solar panel
Thanks to Don and Ron for their detailed help, I think I'm on the right path to fixing this now. -doug On Nov 28, 2004, at 12:22 PM, Doug Forman wrote: I use inexpensive (now discontinued) Radio Shack bench volt and ammeters when I am combining rechargeable batteries and a small solar panel for QRP portable use. (btw, Volkswagon places small 12v solar panels in the windshield of some of their cars when shipped from overseas to keep the batteries trickle charged... these are ruggedly built, are labeled for 3.2w/18.8v/170ma, and have a cigarette-lighter plug attached... bought mine for around $9 on eBay). In a "senior moment" (cough) I recently mistakingly hooked 12v from a small 0.8ah gelcell battery (that I connect to my KX1) directly across the + and - terminals of my 0-1000mA meter. After the smoke cleared, and I disassembled the case, I noticed that I had melted a wire connecting the meter to a binding post. The ammeter is a simple meter with three binding posts... 0-500, 0-1000 and common. It sold for around $13 at Radio Shack (part number 22-401) but was discontinued over a year ago (I've tried to just buy another one with no luck). Inside the small plastic case is the meter and wires, no other parts. Internally, the meter has no part markings other than the word "CHINA". The black (hookup) wire from the meter terminal was soldered to a bare wire covered with loose fabric insulation, which was then soldered to the common (black) binding post (this was the wire that melted), and the red (hookup) wire connects to a bare wire which connects the (red) 0-500 and (red) 0-1000 binding posts and is covered with loose fabric insulation close to the 0-500 binding post (the red side is still there and did not melt). Any thoughts, suggestions and wisdom from the "wizards of the list" would be most appreciated - as this question may be a little off-topic, perhaps replies should be sent to me off-list (or not?) your choice... 72, Doug N7BNT ___ 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/elecraftHelp: 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] Blown ammeter question used with KX1/gelcell/solar panel
I use inexpensive (now discontinued) Radio Shack bench volt and ammeters when I am combining rechargeable batteries and a small solar panel for QRP portable use. (btw, Volkswagon places small 12v solar panels in the windshield of some of their cars when shipped from overseas to keep the batteries trickle charged... these are ruggedly built, are labeled for 3.2w/18.8v/170ma, and have a cigarette-lighter plug attached... bought mine for around $9 on eBay). In a "senior moment" (cough) I recently mistakingly hooked 12v from a small 0.8ah gelcell battery (that I connect to my KX1) directly across the + and - terminals of my 0-1000mA meter. After the smoke cleared, and I disassembled the case, I noticed that I had melted a wire connecting the meter to a binding post. The ammeter is a simple meter with three binding posts... 0-500, 0-1000 and common. It sold for around $13 at Radio Shack (part number 22-401) but was discontinued over a year ago (I've tried to just buy another one with no luck). Inside the small plastic case is the meter and wires, no other parts. Internally, the meter has no part markings other than the word "CHINA". The black (hookup) wire from the meter terminal was soldered to a bare wire covered with loose fabric insulation, which was then soldered to the common (black) binding post (this was the wire that melted), and the red (hookup) wire connects to a bare wire which connects the (red) 0-500 and (red) 0-1000 binding posts and is covered with loose fabric insulation close to the 0-500 binding post (the red side is still there and did not melt). Any thoughts, suggestions and wisdom from the "wizards of the list" would be most appreciated - as this question may be a little off-topic, perhaps replies should be sent to me off-list (or not?) your choice... 72, Doug N7BNT ___ 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] KX1 Carrying Cases back in stock!
After being sold out for over a month, I now have a new shipment of very nice Carrying Cases for the KX1 in stock for immediate shipment. Look for them on eBay or order direct on my website: http://www.n7bnt.com/kx1case.html 72, Doug Forman N7BNT ___ 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] Comparing HexKey CW Paddle
No opportunity to compare the HexKey to anything yet. When I placed my order on the Elecraft website last week, I got an email confirmation the next day saying "the KHXKEY is on backorder for approximately 5 weeks"... -de N7BNT Doug === On Nov 1, 2004, at 6:00 PM, Jeff Burns wrote: Has anyone been able to compare the new HexKey to keys made by Begali or Schurr? I have a Schurr Portable Wabbler and have had my eyes on the Graciella Vertical Key. Just wondering how thy compare. Jeff Burns AD9T ___ 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] Two battery questions - K2 portable operations
Thanks to everyone who responded publicly and privately regarding my K2 portable battery questions. Very helpful information was shared and I certainly learned more about using SLA batteries generally, and in combination with each other too. Here are some of the suggestions gleaned from multiple emails: 1. In a perfect world, it's not advisable to connect two identical SLA batteries in parallel (since if one battery is lower than the other, the high one will discharge into the lower one in an attempt to charge it and equalize voltages.) Instead, use a switch, or a battery isolator. 2. Don't let the battery voltage drop below approx 10.5v on a 12v battery to prevent damage to the battery. 3. Keep batteries charged using a trickle charger when not in use (I use an A&A Engineering "Smart Battery Charger") 4. Consder the relative weight of the battery for portable ops. 5. Don't attempt to charge a SLA battery directly from a solar panel without a charge controller. (found a 10/2001 QST article featuring the SunLogic Micro M+ Charge Controller that looks appealing!) 6. Some ARES folk like 17Ah SLA's for portable ops, commenting that they "are a great size for portable backpack operation". (www.eham.net/articles/2228) Thanks to everyone for responding! 73, Doug - N7BNT ___ 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] Two battery questions - K2 portable operations
I'm assembling a portable kit in which I can fit two small sealed lead-acid batteries. For my specific size requirements, I have the option of putting (2) 12v (3.0Ah) batteries in parallel, or (2) 6v (3.0Ah) batteries in series to obtain the 12vdc I need. (the specific batteries I am considering are the PowerSonic PS-1230 - Mouser # 547-PS-1230 or the PowerSonic PS-630 - Mouser # 547-PS-630) It seems to me that with [ 2 x 6v (3.0Ah) = 12v (3.0Ah) ] while [ 2 x 12v (3.0Ah) = 12v (6.0Ah) ]. Maybe the simplicity of this makes me question this assumption, or maybe it's been too long since I did these kinds of calcs ;-) Could someone please confirm or deny my thoughts here? Also, I'm trying to calculate (roughly) the useful battery capacity based on considering the minimum current draw from a rig, and the maximum current draw from the same rig. For example, given the battery configurations above, and considering the K2 approximate minimum current draw of 150mA and approximate maximum current draw of 2A (at 10w), what is the potential operating time ranges available from the batteries? Thanks in advance & 73, Doug N7BNT ___ 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] I0CG K1 SSB mod
I'm curious how many readers on this list have done the I0CG SSB mod to
their K1's and what the consensus is about it? I'm especially
interested in anyone using it for digital modes (i.e. PSK31) The
information I can find about the mod seems to end in the Summer 2003.
Thanks,
Doug N7BNT
On Oct 3, 2004, at 10:52 AM, Sandy W5TVW wrote:
Not REALLY being interested in SSB, I was fascinated by the I0CG
conversion
for the K1, but only for PSK. As far as a "new" rig from Elecraft,
I'd be more
interested in one similar to the K1, but with CW and PSK capabilities.
"Filter" wise, possibly a frequency agile receiver filter bandpass
bandwidth (1.5 khz-.05 khz) and bandpass center frequency variable
over whatever the audio range would be (500-2500 Hz?)
{pipe dreams?}
73,
Sandy W5TVW
- Original Message -
From: "Julian, G4ILO" <[EMAIL PROTECTED]>
To: "Elecraft List"
Sent: Sunday, October 03, 2004 4:16 AM
Subject: Re: [Elecraft] Re: KX1 PSK31? [how about FSK?]
| This could be accomplished with a K1 using I0CG's SSB modifications
| (http://it.geocities.com/giulianoi0cg/i0cg_home_page.html). It's a
pity
| Elecraft didn't take this idea and create an "official" K1 SSB for
those
| of us not brave enough to do it the hard way like I0CG.
|
| I suppose a multi-mode QRP rig in a KX1-sized package would be even
| cooler, but I guess it would need a lot of SMD circuitry to make it
| feasible.
| --
| Julian, G4ILO (RSGB, ARRL)
| G4ILO's Shack: http://www.tech-pro.net/g4ilo
|
| Doug Forman <[EMAIL PROTECTED]> wrote:
|
| I would also express my huge interest in a mini-qrp rig (KX1/K1/etc)
| that is multi-band with a built-in antenna tuner for digital modes
| (PSK-31/MFSK/etc).
|
| ___
| Elecraft mailing list
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http://mailman.qth.net/mailman/listinfo/elecraft
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| Elecraft web page: http://www.elecraft.com
|
|
___
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Re: [Elecraft] Re: KX1 PSK31? [how about FSK?]
I would also express my huge interest in a mini-qrp rig (KX1/K1/etc) that is multi-band with a built-in antenna tuner for digital modes (PSK-31/MFSK/etc). My KX1 is a superb radio. I absolutely love it and rate it a strong 9 out of 10. To make 10, and be used much more for me personally, it would need (1) the ability to do digital modes, (2) more frequency memories, and (3) computer interface for programming and rig control (which sort of goes along with digital modes, and sort of doesn't!) Okay, so my wish list might not completely be consistent with a "trail radio" and the design goals of the KX1. No problem, I'm flexible. Add my requested features to the K1 instead and I will reply with my MasterCard number instantly! Or maybe a wonderful new Elecraft product focused on QRP digital modes? 72/73's Doug N7BNT KX1 # 731 wayne burdick wrote: Hi Eric, Great idea, but the KX1's final amplifier operates class C. To make the KX1 transmit on SSB would require class AB PA bias and the addition of a balanced modulator. This is not readily accomplished with either internal mods or an external adapter. However, it may be possible to operate the KX1 in any low-data-rate, dual-tone FSK mode. This is compatible with a class-C final amp, and should require only a firmware change. The KX1's key jack would serve as the data input/output port for connection to a computer. Unfortunately FSK (e.g. traditional RTTY) is not quite as popular as PSK31 for QRP use, even though good reliability is possible with some variants. Would this be of interest? 73, Wayne On Oct 2, 2004, at 12:32 PM, Eric Ward wrote: When I was tuning around today on my KX1, I heard the usual strong warble around 14.070 and I got the brilliant idea to: plug a patch cord from the KX1 headphone output to my soundcard input, launch PSK31 Deluxe, crack open the AF gain, and boom, 5 QSOs popped up right away. I know the thinking on omitting an SSB option from the KX1 is because voice doesn't typically work reliably below about 10W, and an SSB board wouldn't fit in the KX1 case. But like CW, PSK31 can work like a champ even at 100s of mW. So how about an Elecraft-designed-and-produced *outboard* SSB adapter for the KX1, designed specifically for PSK31? On biz trips, I usually have my KX1 and laptop--it would be great to take along one more little black box and be able to work PSK31, while making use of the KX1's KXAT1 capability to match a hotel room random wire on multiple bands. (The Small Wonder Labs PSK series looks exceedingly cool, but is rock-bound to a single band and requires an external tuner for non-resonant antennas.) Good idea? Dumb idea? 73, Eric N0HHS KX1 #670 --- 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/elecraftHelp: 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] Favorite pre-assembled BNC/Coax cable vendor?
Greetings everyone, Anyone have recommendations for a great place to buy pre-assembled BNC-to-BNC and/or BNC-to-PL259 cable assemblies in various lengths? Thanks & 73's Doug N7BNT ___ 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] Mouser Part # Needed
I agree! I have occasionally used Mouser for small quantities of parts for little projects, and they have always been accurate and quick! I always specify First Class Mail when I can for quick delivery. 72/73's Doug N7BNT On Aug 8, 2004, at 10:33 PM, Tom Hammond wrote: Hi Bryan: At 09:04 PM 8/8/04, Brian Wruble wrote: I wonder if one day the folks at Elecraft might publish a list of Mouser (or other supplier) catalog parts numbers for all the parts in the Elecraft lineup of kits. This would probably reduce the burden they face supplying replacement parts to the Elecraft buffs. Mouser provides extremely rapid service, even overnight if you're willing to pay for it. Just a thought... My only(!) problem with Mouser is that they now ship EVERYTHING in a box which costs no less than $6.50 to ship (UPS). They used to ship small parts on padded envelopes for a couple bucks, but now nothing goes out unless it's boxed. I do, however, like the fact that no matter how small your order, there's never a handling fee and only ACTUAL shipping is charged. There IS a $1 'handling' charge if you ask them to ship via USPS because someone must hand-carry the box (again) to the P.O. They ARE fast and generally accurate in their parts picking. 73, Tom HammondN0SS ___ 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/elecraftHelp: 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: QRP Power Pack for K1 (was Re: [Elecraft] K2 #4334 alive and well!)
Thanks Guido... yes, I would like to see the schematic if you would like to post it. Very nice work! From your photos, it looks like you have a fun group of Elecraft owners there! 73's Doug On Aug 3, 2004, at 12:56 PM, Guido Tedeschi wrote: Hi Doug, the "QRP Power Pack" is the perfect little companion for my K1. It contains a 12V/1.3Ah gel battery and a voltage/current limited charger with a DC-DC converter to charge the battery with only a 12V source. When 12V is supplied to the input jack, the battery is charged and the output is directly connected to the input with a small relay, when no power is applied to the input jack, the relay switch the output to the battery. If it can be interesting, I will publish the schematic diagram on the web... Ciao and 73 Guido, ik2bcp - Original Message ----- From: "Doug Forman" <[EMAIL PROTECTED]> To: "Guido Tedeschi" <[EMAIL PROTECTED]> Cc: "Elecraft Discussion List" Sent: Monday, August 02, 2004 3:04 AM Subject: Re: [Elecraft] K2 #4334 alive and well! On Aug 1, 2004, at 1:33 PM, Guido Tedeschi wrote: If you want to see some photos (iz2ftr's rigs are still to be added): http://www.hamlan.org/elecraftbs/photos.htm Hi Guido, Would you like to describe your "QRP Power Pack" featured in the photos? Thanks & 73, Doug N7BNT ___ 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] K2 #4334 alive and well!
On Aug 1, 2004, at 1:33 PM, Guido Tedeschi wrote: If you want to see some photos (iz2ftr's rigs are still to be added): http://www.hamlan.org/elecraftbs/photos.htm Hi Guido, Would you like to describe your "QRP Power Pack" featured in the photos? Thanks & 73, Doug N7BNT ___ 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] KX1 Accessories Website
I'd like to invite you all to visit my new website featuring (a couple, so far) items for the KX1. I hope to be adding other selected QRP and/or Elecraft related accessory items as time goes on. http://www.n7bnt.com 72/73's Doug N7BNT KX1 #731 ___ 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] Antenna?
Okay, this is a follow-up to my KX1 antenna question posted last night. I came home tonight and did a bunch more measurements. First, grouped by antenna: Cushcraft MA5V "Mini Vertical" 40m: 7055 - (tuner in - 2.1 Watts out, SWR 1.1 ) - (tuner out - 1.4 Watts out, SWR 5.7) - MFJ-259B: SWR 7.6 30m: 10107 - (tuner in - 4.3 Watts out, SWR 5.6) - (tuner out - 6.3 Watts out, SWR 9.9) - MFJ-259B: SWR 6.5 20m: 14065 - (tuner in - 2.1 Watts out, SWR 1.0 ) - (tuner out - 2.5 Watts out, SWR 1.0) - MFJ-259B: SWR 1.1 Slinky Dipole "CliffDweller II" 40m: 7055 - (tuner in - 2.1 Watts out, SWR 1.0) - (tuner out - 2.0 Watts out, SWR 1.3) - MFJ-259B: SWR 1.6 30m: 10107 - (tuner in - 1.8 Watts out, SWR 5.2) - (tuner out - 1.8 Watts out, SWR 7.0) - MFJ-259B: SWR 8.4 20m: 14065 - (tuner in - 3.0 Watts out, SWR 1.2) - (tuner out - 1.4 Watts out, SWR 8.0) - MFJ-259B: SWR 8.8 Dummy Load (Oil-filled "Can-tenna") 40m: 7055 - (tuner in - 2.9 Watts out, SWR 1.0) - (tuner out - 2.2 Watts out, SWR 1.0) 30m: 10107 - (tuner in - 2.3 Watts out, SWR 1.0) - (tuner out - 2.5 Watts out, SWR 1.0) 20m: 14065 - (tuner in - 2.3 Watts out, SWR 1.0) - (tuner out - 2.0 Watts out, SWR 1.0) Second, grouped by band: 40 meters (7055) MA5V Vertical - (tuner in - 2.1 Watts out, SWR 1.1 ) - (tuner out - 1.4 Watts out, SWR 5.7) - MFJ-259B: SWR 7.6 Slinky Dipole - (tuner in - 2.1 Watts out, SWR 1.0) - (tuner out - 2.0 Watts out, SWR 1.3) - MFJ-259B: SWR 1.6 Dummy Load - (tuner in - 2.9 Watts out, SWR 1.0) - (tuner out - 2.2 Watts out, SWR 1.0) 30 meters (10107) MA5V Vertical - (tuner in - 4.3 Watts out, SWR 5.6) - (tuner out - 6.3 Watts out, SWR 9.9) - MFJ-259B: SWR 6.5 Slinky Dipole - (tuner in - 1.8 Watts out, SWR 5.2) - (tuner out - 1.8 Watts out, SWR 7.0) - MFJ-259B: SWR 8.4 Dummy Load - (tuner in - 2.3 Watts out, SWR 1.0) - (tuner out - 2.5 Watts out, SWR 1.0) 20 meters (14065) MA5V Vertical - (tuner in - 2.1 Watts out, SWR 1.0 ) - (tuner out - 2.5 Watts out, SWR 1.0) - MFJ-259B: SWR 1.1 Slinky Dipole - (tuner in - 3.0 Watts out, SWR 1.2) - (tuner out - 1.4 Watts out, SWR 8.0) - MFJ-259B: SWR 8.8 Dummy Load - (tuner in - 2.3 Watts out, SWR 1.0) - (tuner out - 2.0 Watts out, SWR 1.0) Notes: 1. KX1 #731 with 30m and Antenna Tuner installed, running from batteries only, Lithium, 8.9v indicated. All power out and SWR indications from the KX1 except as noted from the MFJ-259B. 2. SWR Analyzer is MFJ-259B 3. MA5V Vertical is tuned for digital modes, so SWR measurements of 1.0 and 1.1 are expected. Observations: 1. KX1's antenna tuner does a fantastic job matching either antenna on 40 meters. 2. KX1's antenna tuner does a dismal job matching either antenna on 30 meters. 3. KX1's antenna tuner does a fantastic job matching the slinky dipole on 20 meters. (vertical is already resonant on 20m) I guess it's just interesting to me that the internal tuner does such a GREAT job matching the 135' slinky dipole on both 20 and 40 meters, but falls apart on 30meters. It's also interesting to me that the internal tuner NICELY matches the MA5V on 40 meters (it's only a 10-20m vertical with a SWR of 7.6 on the antenna analyzer at 7055khz). I appreciate the suggestions I have received so far and will check them out - first by adjusting the coax length by adding some to see if the 30 meter situation improves (without negatively affecting 20/40 meters). Any other observations or suggestions are welcome! 72's, Doug N7BNT ___ 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/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Antenna?
Hi All, I'm new to this list and Elecraft too - I've recently completed building a "loaded" KX1 #731. After building and aligning the KX1 with zero problems, I connected it to both my 130+ ft "slinky dipole" strung-up in the attic of our single-level home (with RG8X) and also my Cushcraft MA5V vertical (10-12-15-17-20) up around 33 feet at the base (also with RG8X). I was pleasantly surprised to hear the receiver come alive with signals on all three bands. The built-in antenna tuner reports: Slinky Dipole "CliffDweller II" 40m: 7055 - 2.1 Watts out, SWR 1.0 30m: 10107 - 1.8 Watts out, SWR 5.2 (relay chatter) 20m: 14065 - 3.0 Watts out, SWR 1.2 Cushcraft MA5V "Mini Vertical" 40m: 7055 - 2.1 Watts out, SWR 1.1 30m: 10107 - 4.3 Watts out, SWR 5.6 (relay chatter) (power out reading suspect) 20m: 14065 - 2.1 Watts out, SWR 1.0 Dummy Load (Oil-filled "Can-tenna") 40m: 7055 - 2.9 Watts out, SWR 1.0 30m: 10107 - 2.3 Watts out, SWR 1.0 20m: 14065 - 2.3 Watts out, SWR 1.0 (all using Lithium Batteries) Any thoughts regarding why the tuner has such a problem on 30m? Wow, what a great little rig! This is going to be fun. Elecraft is certainly a class act. 72 & 73 Doug N7BNT ___ 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/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
