[Elecraft] Stepper Motor
Actually Vic, I think a few folks might be interested in this topic on the reflector (for a while). I, too, have a number of steppers and would like to use them for remote tweaking of a phased array. I do know there are several controller kits available and easily found. The question seems to be, what kind of stepper do you have and exactly how do you wish to control it? The are two options that seem to be the most flexible, using a Basic Stamp or a PIC. If you have something like the PIC-EL kit from AmQRP already, then the PIC option may be the easiest to work with first. From what I've read a lot of the robot folks seem to like the stamp approach. Look forward to reading some other input, and maybe some practical advice. cheers, Julius n2wn Message: 23 Date: Tue, 29 Mar 2005 10:31:12 -0800 From: Vic Rosenthal [EMAIL PROTECTED] Subject: [Elecraft] OT - stepper motor question To: Elecraft Reflector elecraft@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii; format=flowed I just know someone here can help me! Please reply off-reflector. I recently had the opportunity to take apart a big old Ricoh copy machine. I recovered all kinds of neat mechanical and electrical parts, inclucing bunches of solenoids, motors, etc. One of the coolest is a motor marked 55SPM-25D5A AX050032 30V 6.5 [ohms symbol]. Google gets nothing on either of these numbers. It has 6 wires coming out of it. On the basis of this, and the 'coggy' feel when I turn the shaft, I think that it is a permanent-magnet unipolar stepper motor. I want to build a remotely tuned very QRO L-network antenna tuner (I already have a large rotary inductor and capacitor). What I want to do is use this stepper to turn the capacitor to preset positions. Once the capacitor is set, I will be able to drive the inductor with a simple geared motor and just tune for lowest SWR. Reading material on stepper motor control systems has my head spinning! Is there some kind of simple off-the-shelf controller that I can get that will do most of the work? What I would REALLY like would be to just turn a local knob to adjust the capacitor (sort of like the way a selsyn acts), but there may be other approaches. -- 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] T1 Cheat Sheet
Although the T1's info menu is very simple, I have a way of forgetting things, so I stuck a little cheat sheet to the underside of the battery compartment lid in order to prevent any future confusion. I cut a large address label to 2 x 7/8, then made a small vertical chart, identifying each parameter. I also decided it was a good place to put my name call in case I lose this little thing. Before sticking it to the lid, I cut a piece of clear laminate just slightly larger and put over it. Denny PaytonN9JXY Auburn, IN ___ 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: AW: [Elecraft] KX-1 switches - anyone else having problems?
The wobble itself is normal, but I have the skipping every now and then too. Mine either loops (1-2-3-1-2-3) or skips (0-2-4-7-8), but not often enough to make me want to replace the encoder yet. I think I damaged the encoder in a backpack, as I had to replace the pots in the past. I tried to show it to Wayne N6KR but it wouldn't fail then. [EMAIL PROTECTED] One thing I have noticed on the KX1 is that the shaft encoder is a tad flaky ... sometimes I'll be tuning downward and the freq goes up one or two numbers in the least significant position. It sort of depends on how you hold the knob. A little pressure toward the top will increase the flakiness, toward the bottom will cure 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] again: CAL tPa problem
Don, If you can record and report the conditions (band, operational data before the occurrance, etc.) you observe each time it happens, you may be helping others and the real cause just might be found and corrected. this is my problem. It seems there are no specific conditions to trigger this behaviour. The effect seems to be ... - band independent - VSWR independent (but never happened with a dummy connected) - only happens during high power keydown times About one second before tPa jumps to 255 (PA HOT) the sidetone becomes garbled (some kind of pulsing noise or maybe short interruptions in the sidetone). Maybe the garbling is caused by AuxBus activity during transmit, overloading the main MCU ? If I'm quick and do stop my transmission immediately, K2/KPA100 stay fine. But if I'm late PA HOT comes up and locks the unit. tPA calibration then has to be re-done. Once a while ago I set up my oscilloscope connected to the AuxBus to see, whether the KPA100 receives a command to reset tPa, or the KPA100 resets the value autonomously. Unfortunately the error didn't happen during the testing period. The last four months nothing happened, last weekend however tPa was reset two times within hours. No changes in my station setup were done beforehand. I know the above information doesn't help much, but I can't find the system behind the effect. I think some more in-depth knowledge of the design is necessary, especially about the AuxBus communication regarding the CAL tPa procedure. I hope one of the experts here can solve this one day. VY 73 de Marcus, DL1EKC ___ 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] ECN/30 - New UTC time
Just a reminder that the ECN/30 will be meeting Thursday at 8E/7C/6M/5P (0100 UTC Friday). I've moved to a later hour to accomodate for the later local sunset (propagation). It will have the added advantage of allowing those who live in the west to check in after they get home from work. We will try to keep this 0100z time slot through the DST time shift this weekend - so next week, it will be Thursday 9E/8C/7M/6P (0100 UTC Friday). Due to the low power nature of the net (and net control), our frequency is flexible. We will meet on 10.1x2.7 or 10.1x7.2 - depending on QRM. If we get bumped off the frequency we started on, look for net control calling on another. Turn out has been pretty low for the last month. Hopefully with the later hour, we'll have more folks check in. 73, Daniel AA0NI Oklahoma City K2 #3421 ___ 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] Low power in tune with ssb module
Humble Pie time, I previously sought advice from the list regarding low power output from my K2 in Tune mode, and I later found also in CW mode. This only occurred when the SSB module was installed. After much investigation of the SSB module, rechecking component location etc.. I had a relapse to normality from dyslexic mode and found RP3 and 5 were in each others locations. A quick swap back and everything was fine. That explained why my mic gain seemed a bit high too All is well now. I had plenty of opportunity to play over the weekend while the CQ WPX contest was on. I made about 80 contacts (32 countries I think it was) during the contest just playing with the K2, trying different levels of audio compression etc.. and checking the effect on the pile-up busting ability. Often got in first time, the VP8 prefix helps there, but the DX does have to hear it! I built the DSP module on Sunday night and installed it on Monday. That's quite impressive. It'll take me a while to get it set up for my ear I guess. 73 Chris - VP8BKF ___ 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] Looking for 40m RF amp design for my K2
I'm looking for designs for an RF amp for my K2. Can anyone point me to a design? I plan to use it for CW only, 40 meters only, and roughly 75 watts output. Solid state preferred but not required. I'd like to keep it external to my K2 so I can keep the K2 in its QRP flavor. Thanks, --Andrew, NV1B, CFO 963 ___ 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] Looking for 40m RF amp design for my K2
http://www.communication-concepts.com/hf_amplifiers.htm should be of some interest to you -- On 30 Mar 2005 at 10:18, Andrew Moore wrote: I'm looking for designs for an RF amp for my K2. Can anyone point me to a design? I plan to use it for CW only, 40 meters only, and roughly 75 watts output. Solid state preferred but not required. I'd like to keep it external to my K2 so I can keep the K2 in its QRP flavor. Thanks, --Andrew, NV1B, CFO 963 ___ 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 virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.8.6 - Release Date: 3/30/05 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.8.6 - Release Date: 3/30/05 ___ 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 - 6 bands simultaneously?
This is probably FAQ, but I'm curious if/how the K1 is set up for 6 bands simultaneously (basically a K1-4 with an extra 2-band filter module.) I'd really like to find a way not to have to open the rig to switch between band sets, and would like to have access to 80 and 15/17 along with the core K1-4 bands. Just a quick look it seems internally like a wider version of the K1-4 board (extending towards the front panel) would make it possible to host the extra K1-2 (along presumably with the supporting firmware to drive relays on both modules.) I'm fairly new to the list and product so if this has been discussed before, please excuse the noise. 73 Dave WB0GAZ [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
Re: [Elecraft] ECN/30 - Frequency
--- [EMAIL PROTECTED] wrote: What does this mean for a frequency? - 10.1x2.7 or 10.1x7.2 Mike, NJ2OM Hi Mike, Excellent question - and hopefully my explanation will make sense for you and others who are curious. The 'x' in 10.1x2.7 and 10.1x7.2 can stand for any number that results in a legal operating frequency inside the 30m band. This means that ECN/30 could meet on any one of the following frequencies: 10.102.7 10.107.2 10.112.7 10.117.2 10.122.7 10.127.2 10.132.7 10.137.2 10.142.7 10.147.2 I've found that I've been run off the net frequencies I've picked on 30m a few times, so to make it easier to find the net and avoid QRM - I took a hint from another member on the elecraft list and decided to pick frequencies that aren't cardinal frequencies (e.g. frequencies that end in 5.0 or 0.0 like 10.115.0) where you are likely to run into non-QRP ops with less than sensitive radios when compared to the elecraft kit radios. The first frequencies I tried one week were just randomly picked - but when I realized 5 minutes before the net that week that I didn't remember what frequencies I posted to the list, I decided to just pick something that was easier to remember. Since many elecrafters are QRP ops, I figured that 72 was easy to remember - and likewise - 27. That's why the ECN/30 net can meet on any of the 30m frequencies that end in 2.7 or 7.2. Also - because it is easy to get run off a frequency when running a QRP net, I want others to know that we can very quickly re-establish the net on another frequency that is pre-determined - that's why there's more than one net frequency - in case the frequency is in use - or in case a less than 'sensitive' operator, digital station, or DX/pileup runs us off the frequency we are trying to use. I hope this explains my reasoning and makes it easier for everyone to find the net. 72/73, Daniel AA0NI Oklahoma City ___ 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] Looking for 40m RF amp design for my K2
I was wondering of anyone has built the amp shown at the link below. It had my interest for a while until it's power requirements were pointed out to me as being a drawback, price-wise. Tom WB2QDG K2 1103 -- Original message -- From: Mike W [EMAIL PROTECTED] http://www.communication-concepts.com/hf_amplifiers.htm should be of some interest to you -- On 30 Mar 2005 at 10:18, Andrew Moore wrote: I'm looking for designs for an RF amp for my K2. Can anyone point me to a design? I plan to use it for CW only, 40 meters only, and roughly 75 watts output. Solid state preferred but not required. I'd like to keep it external to my K2 so I can keep the K2 in its QRP flavor. Thanks, --Andrew, NV1B, CFO 963 ___ 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 virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.8.6 - Release Date: 3/30/05 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.8.6 - Release Date: 3/30/05 ___ 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] Looking for 40m RF amp design for my K2
Look at the Class E designs .. cheap transistors, switching power supplies, easy to build de John/W1RT On Wed, 30 Mar 2005 10:18:27 -0500, Andrew Moore [EMAIL PROTECTED] wrote: I'm looking for designs for an RF amp for my K2. Can anyone point me to a design? I plan to use it for CW only, 40 meters only, and roughly 75 watts output. Solid state preferred but not required. I'd like to keep it external to my K2 so I can keep the K2 in its QRP flavor. Thanks, --Andrew, NV1B, CFO 963 ___ 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] Looking for 40m RF amp design for my K2
In a message dated 30/03/05 17:03:47 GMT Daylight Time, [EMAIL PROTECTED] writes: I was wondering of anyone has built the amp shown at the link below. It had my interest for a while until it's power requirements were pointed out to me as being a drawback, price-wise. --- Check Motorola designs AN762 and EB63 on the given website. Both of these are designed to run from 12 to 14V DC at maybe something like 22A, so cannot understand the power supply problem. There are suitable power supplies available relatively cheaply for this in abundance. Believe the classic design AN762 which is the basis of the linear amplifier in most HF 100W transmitters is featured in ARRL publications and is described in detail in the RSGB Radio Communications handbook. Bob, G3VVT ___ 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: Stepper Motor
J F wrote: Actually Vic, I think a few folks might be interested in this topic on the reflector (for a while). I, too, have a number of steppers and would like to use them for remote tweaking of a phased array. I do know there are several controller kits available and easily found. The question seems to be, what kind of stepper do you have and exactly how do you wish to control it? The are two options that seem to be the most flexible, using a Basic Stamp or a PIC. I've received a great deal of input from folks on the reflector. What I have is a unipolar motor, which turns out to have been manufactured by Panasonic. I also have since removed various other steppers from old disk drives. I've ordered a driver kit from http://www.electronickits.com for $23, and there is one offered for $13 at http://store.qkits.com/moreinfo.cfm/QK179. I think I am not going to try to control it with a microprocessor at first. My L-network tuner will have a rotary inductor and variable capacitor, and possibly a relay to switch in a fixed capacitor. I will first try to set it up so it can be tuned remotely using switches, buttons, possibly an encoder, etc. I will also provide some kind of position feedback to help me find preset positions quickly. If I'm successful, then I will think about automatically finding presets or even tuning to minimize SWR. Controllers are available that interface directly to a PC. One possible application would be to completely control a remote K2 -- including the RF and AF gain controls -- from a PC. -- 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] z5 resonator leads
Hi folks: The excitement is building. K2 s/n 3460 and I have made it as far as page 46. Who would have thought that an instruction manual would be such a page turner? During Alignment and Test, Part 1 Info Code 080 pointed me to a problem with the Z5 ceramic resonator: I forgot to put it in. Three solder joints and one hard reset later, it's page 47 and beyond, but I am reminded why I missed that step in the first place. It's because I meant to ask you guys: What do I do with the leads of Z5? Do I clip them, or leave them alone? For some reason I got it in my mind that they must not be disturbed. BTW, thanks to all who replied, on and off list, to my r18/r19 query. Indeed, the headers that came with KAF2 accept jumper leads, thus sparing me four desoldering maneuvers. jh ___ 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] WA3WSJ: Turkey Point Lighthouse ARLHS USA-857 on Thursday
Hello all, Due to battery limitations and bad band conditions, I will focus my effort on cw. I will operate ssb, but mostly cw. Look for me on the following frequencies: CW: 7.040mhz and 14.060mhz (5w) SSB: 7.270mhz and 14.270mhz (10w) Remember that if you work WA3WSJ, you are eligible to receive a special 8.5 x 11 Turkey Point Lighthouse Photo Collage! Just send me a qsl card with USA-857 on the card or envelope - NO SASE. Antenna: VBWFPA Rig:Elecraft K2 Key: AT Paddle 72, Ed, WA3WSJ ARLHS # 983 ___ 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] z5 resonator leads
In a message dated 30/03/05 17:45:28 GMT Daylight Time, [EMAIL PROTECTED] writes: What do I do with the leads of Z5? Do I clip them, or leave them alone? - The usual rule is if the component wire ends stick out chop 'em off. It can pay dividend in avoiding shorts sometimes and with Z5 there is nothing that would be adversely affected by doing this. Bob, G3VVT ___ 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] z5 resonator leads
After you have you have soldered Z5 into the correct place on the PCB trim the free wire ends as normal as with most other components. Just to avoid any confusion! Bob, G3VVT ___ 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] ECN/30 - Frequency
K.I.S.S. Why not choose: 10,102.7 10,103.7 10,104.7 10,105.7 10,106.7 10,107.7 10,108.7 10,109.7. Then, you tune in the net (at 10Hz) 10,102.70, and then set the rate to 1KHz. Each VFO step is another freq. Very little dial twiddling needed to QSY up one, two, three or so channels. Once you've zero-beat the group on any freq (at 10Hz rate), going back to 1KHz rate will keep them zero-beat (if you pick the right channel. You may expand or modify the list, but please leave everything right of the radix alone. Dan / WG4S / K2 #2456 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Daniel Reynolds Sent: Wednesday, March 30, 2005 11:01 AM To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Subject: Re: [Elecraft] ECN/30 - Frequency --- [EMAIL PROTECTED] wrote: What does this mean for a frequency? - 10.1x2.7 or 10.1x7.2 Mike, NJ2OM Hi Mike, Excellent question - and hopefully my explanation will make sense for you and others who are curious. The 'x' in 10.1x2.7 and 10.1x7.2 can stand for any number that results in a legal operating frequency inside the 30m band. This means that ECN/30 could meet on any one of the following frequencies: 10.102.7 10.107.2 10.112.7 10.117.2 10.122.7 10.127.2 10.132.7 10.137.2 10.142.7 10.147.2 I've found that I've been run off the net frequencies I've picked on 30m a few times, so to make it easier to find the net and avoid QRM - I took a hint from another member on the elecraft list and decided to pick frequencies that aren't cardinal frequencies (e.g. frequencies that end in 5.0 or 0.0 like 10.115.0) where you are likely to run into non-QRP ops with less than sensitive radios when compared to the elecraft kit radios. The first frequencies I tried one week were just randomly picked - but when I realized 5 minutes before the net that week that I didn't remember what frequencies I posted to the list, I decided to just pick something that was easier to remember. Since many elecrafters are QRP ops, I figured that 72 was easy to remember - and likewise - 27. That's why the ECN/30 net can meet on any of the 30m frequencies that end in 2.7 or 7.2. Also - because it is easy to get run off a frequency when running a QRP net, I want others to know that we can very quickly re-establish the net on another frequency that is pre-determined - that's why there's more than one net frequency - in case the frequency is in use - or in case a less than 'sensitive' operator, digital station, or DX/pileup runs us off the frequency we are trying to use. I hope this explains my reasoning and makes it easier for everyone to find the net. 72/73, Daniel AA0NI Oklahoma City ___ 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
FW: [Elecraft] z5 resonator leads
The confusion would come from the warning not to trim the leads of the relays. Trim ALL other leads. Dan / WG4S / K2 #2456 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Wednesday, March 30, 2005 12:13 PM To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Subject: Re: [Elecraft] z5 resonator leads After you have you have soldered Z5 into the correct place on the PCB trim the free wire ends as normal as with most other components. Just to avoid any confusion! Bob, G3VVT ___ 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] Should You Built It? Not necessarily
There are (at least) three types of people on this list: - those who take pride in what they build - those who take pride in what they operate - those who take pride in both Count me in the third category. I thoroughly enjoyed the building process, and have no fear of having to dig into my K2 if I need to fix it. In fact, I had to fix it about 3-4 weeks after I finished it succesfully because my PLL crystal was flaking out. It is my only HF transceiver, and will continue to remain so until Elecraft releases something even better. Would I ever part with my K2? No - because I built it (I happen to be attached to #3421). Unless I was in dire financial need, I doubt I'd sell it, because it is about the cheapest form of active 'entertainment' I own. When I bought the K2, it was with the intention of it being my only radio for a very long time - and it can go just about anywhere I need to go - home, car-camping, picnic table portable - and it is an ideal field day radio (my favorite activity). My 2 cents, Daniel AA0NI --- EricJ [EMAIL PROTECTED] wrote: I'm sorry, but the idea of bonding with inanimate objects is beyond my understanding. ___ 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: Stepper Motor
Vic, there was an article in QST a few years back on an automatic antenna tuner that used steppers. The feedback control used a basic stamp as I recall. It was adaptable, if you want to write/modify code. You may want to think about the rotary inductor. A school of thought has it that they are slow beasts to turn. Switching inductance in and out seems to be faster and easier to control. If you're primarily a CW op, switching is probably the simplest route to go. On the other hand, if you do say CW/SSB/MARS a rotary inductor makes more sense. Thanks for the update! Julius n2wn --- Vic Rosenthal [EMAIL PROTECTED] wrote: J F wrote: Actually Vic, I think a few folks might be interested in this topic on the reflector (for a while). I, too, have a number of steppers and would like to use them for remote tweaking of a phased array. I do know there are several controller kits available and easily found. The question seems to be, what kind of stepper do you have and exactly how do you wish to control it? The are two options that seem to be the most flexible, using a Basic Stamp or a PIC. I've received a great deal of input from folks on the reflector. What I have is a unipolar motor, which turns out to have been manufactured by Panasonic. I also have since removed various other steppers from old disk drives. I've ordered a driver kit from http://www.electronickits.com for $23, and there is one offered for $13 at http://store.qkits.com/moreinfo.cfm/QK179. I think I am not going to try to control it with a microprocessor at first. My L-network tuner will have a rotary inductor and variable capacitor, and possibly a relay to switch in a fixed capacitor. I will first try to set it up so it can be tuned remotely using switches, buttons, possibly an encoder, etc. I will also provide some kind of position feedback to help me find preset positions quickly. If I'm successful, then I will think about automatically finding presets or even tuning to minimize SWR. Controllers are available that interface directly to a PC. One possible application would be to completely control a remote K2 -- including the RF and AF gain controls -- from a PC. -- 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] OT: math question
How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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] OT: math question
dB = 10 log (P2/P1) For your example of 5 watts to 100 watts, is an increase of 13.01029996 dB - pardon the rounding but that is all the digits my calculator shows :). 73, Don W3FPR -Original Message- How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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] z5 resonator leads
On Mar 30, 2005, at 12:23 PM, Dan Barker wrote: The confusion would come from the warning not to trim the leads of the relays. Trim ALL other leads. Even ICs?? ___ 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] z5 resonator leads and AGC voltage
Dan Barker wrote: The confusion would come from the warning not to trim the leads of the relays. Trim ALL other leads. I have assembled control, front panel and first stage of rf board. I didn't trim the IC's leads or resistor pack's leads. I don't know why :-) What comes to testing, I have the same problem with other posters lately. If it can be called as a problem. I am not sure. Mike Markowski wrote: result of a faulty (human!) memory. I remeasured voltages just now at Control Board locations you measured and got these results: - U2 pin 5: maxes out at 3.792 Vif you believe that many significant figures. - U4 OUT: 7.88 V ... the culprit? and finally Paul Bruneau (SN 4818) wrote: I just ran mine through those tests a few days ago and was slightly troubled to note that mine also maxed out just under the 8v. I think mine got up to 7.98. My own (SN 4759) measurements with external DMM were as follows: - U2 pint 5 max 3.79 V - U4 OUT 7.9 V I understand there is no big difference between 3.80V and 3.79V. However, when manual asks (page 47) to adjust R1 for a reading of 3.80V volts it seems peculiar not to have enough adjustment scale to achieve or exceed the required voltage. Rolf Moberg oh6kxl ___ 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] OT: math question
dBm's Just remember this (no maths:))) : Every 3dB increase is power multiplied by 2 times (1W to 2W is 30dBm to 33dBm) So 1W+3dB (1x2=2) is 2W+3dB (2x2=4)4W+3dB(4x2=8)8W and so on. Every 10dB increase is power multiplied by 10 (1W to 10W is 30dBm to 40dBm 100W to 1KW is 50 dBm to 60 dBm the easy one HI) And dont care abt digits on calcullator (try to see 0,5dB on Your S-meter or ask someone on the band to change the power from 100W to 50W or from 10W to 5W (3dB) You will see practically no difference. Why dBm? Because dBm is power related to 1mW=0dBm . S55M-Adi - Original Message - From: W3FPR - Don Wilhelm [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 8:23 PM Subject: RE: [Elecraft] OT: math question dB = 10 log (P2/P1) For your example of 5 watts to 100 watts, is an increase of 13.01029996 dB - pardon the rounding but that is all the digits my calculator shows :). 73, Don W3FPR -Original Message- How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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] Should You Built It? Not necessarily
EricJ wrote: I'm sorry, but the idea of bonding with inanimate objects is beyond my understanding. I disagree. My K2 is no. 709, and has been around for a few years. Since I built it, I have taken it apart what seems to me a thousand times (probably it wasn't really quite so many). I've fixed construction errors and made every modification (and unmade some of them) that could even slightly improve CW performance. I've tried out other people's and my own ideas. In doing so I have taken Wayne and Eric's radio and in a small way made it MY radio. As far as learning, I didn't learn much by simply following the instructions to build it. However, the process of tweaking it, making and evaluating modifications, etc., has been very educational. Although I recognize its limitations (there are some) and wouldn't mind owning an Orion or an FT1KMP (with the required mods, of course), I don't think I will ever let the K2 go. If this isn't bonding in some sense, I don't know what is. If you want to build one, fine. But if you don't, get someone else to do it. Either way, you end up with one of the best radios in its class to enjoy ham radio. And that's the point. And with that I completely agree. -- 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] z5 resonator leads and AGC voltage
On Mar 30, 2005, at 1:34 PM, Rolf Moberg, OH6KXL wrote: My own (SN 4759) measurements with external DMM were as follows: - U2 pint 5 max 3.79 V - U4 OUT 7.9 V I understand there is no big difference between 3.80V and 3.79V. However, when manual asks (page 47) to adjust R1 for a reading of 3.80V volts it seems peculiar not to have enough adjustment scale to achieve or exceed the required voltage. that was exactly why I was somewhat concerned. I was ALMOST there, but not quite. It was disconcerting to me that to get almost there, I had to fully crank the pot to its end stop. When a manual tells me to adjust to a voltage, I like to be somewhere in the middle with my pot...otherwise it makes me wonder what I did wrong. I am still wondering :) As for the alleged 5-10% tolerance of DMMs that one poster suggested, I'm skeptical. If they are that bad, then why doesn't the manual say to adjust to 3.8 volts since the hundredths digit must be totally meaningless. In fact, I see that Fluke claims a .3% DC voltage accuracy of their basic 73/77 multimeters, so thinking the problem lies with my meter doesn't really cut it for me. PB K2 SN 4818 Just getting to the toroids and loving every minute ___ 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] OT: math question
In a message dated 3/30/2005 10:02:44 AM Pacific Standard Time, [EMAIL PROTECTED] writes: How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. The formula is: dB = 10 log (P2 / P1) P2 / P1 = 100 / 5 = 20 log of 20 = 1.30103 10 times it = 13.0103 That's your answer: 13.0103 dB Geoff, K6TFZ ___ 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] OT: math question
Im with Adi on this one..i.e NO MATH!. Although I'm 100% certain Don is correct, my fingers came with *about* a 12.6 dB increase. (I never did understand those loggers) Tom WB2QDG K2 1103 -- Original message -- From: S55M [EMAIL PROTECTED] dBm's Just remember this (no maths:))) : Every 3dB increase is power multiplied by 2 times (1W to 2W is 30dBm to 33dBm) So 1W+3dB (1x2=2) is 2W+3dB (2x2=4)4W+3dB(4x2=8)8W and so on. Every 10dB increase is power multiplied by 10 (1W to 10W is 30dBm to 40dBm 100W to 1KW is 50 dBm to 60 dBm the easy one HI) And dont care abt digits on calcullator (try to see 0,5dB on Your S-meter or ask someone on the band to change the power from 100W to 50W or from 10W to 5W (3dB) You will see practically no difference. Why dBm? Because dBm is power related to 1mW=0dBm . S55M-Adi - Original Message - From: W3FPR - Don Wilhelm [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 8:23 PM Subject: RE: [Elecraft] OT: math question dB = 10 log (P2/P1) For your example of 5 watts to 100 watts, is an increase of 13.01029996 dB - pardon the rounding but that is all the digits my calculator shows :). 73, Don W3FPR -Original Message- How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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] z5 resonator leads and AGC voltage
Paul Bruneau wrote: When a manual tells me to adjust to a voltage, I like to be somewhere in the middle with my pot...otherwise it makes me wonder what I did wrong. I am still wondering :) Indeed. In fact after remeasuring U2 pin 5 voltage I got 3.78 volts. I am not sure whether 3.79 volts is my fault or real previous result. Little difference in any case. I'll remove control panel and check the RP's connections and R1 connections later. Distortion from the kitchen behind the owen is now about 59 + 20dB. It's time to close down for this evening. Rolf oh6kxl ___ 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] QSY to Belle Ile
Hello dear elicrafter's, I will stay from april 10th to april 23th on Belle Ile island for some holidays with all the family for holidays. This island is located near the south west coast of Britany. The island is characterized by a very mild climate (the Gulf Stream is flowing nerby), sandy beaches, high cliffs and a many birds nesting in the cliffs. We plan to have active holidays with walkings and bicycles. I hope also to have some spare time for ham radio ... The IOTA reference is EU-048. I will have my K2 + KPA100, my K1 and a 2x10 m doublet with a ladder line , a 1/4 balun and the KAT100. Most of the activity will be on CW ; 18 and 14 mhz will be prefered bands for DX, but I will be on 3.5 , 7 and 10 Mhz too for europeans special QSL will be send to everybody via the buro. I hope to hear many of you ! 73 de Chris / F6FTB K2#644, K1#1605 and 1998;, KX1#141 ___ 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] LSB/USB Audio
Hello all. I have been setting up my transmit audio on K2 #4785 lsb/usb,ok here is what ive noticed my usb reports on the conventional usb bands 20/15/10 are great no problems also reports on lsb conventional bands 80/40 are also great. When I listen to usb on 80/40 it seems muffled and also the same is true for lsb on 20/15/10 ok this is not a issue as I keep to the lsb/usb band conventions but can someone tell me why the audio is muffled in this way is it desighned to do this. M1MGD G-QRP 11355 Elecraft K1 #1532 K2 #4785..72/73.. ___ 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] OT: math question
K.I.S.S. 10db = 10 times 3db = 2 times Add Products. Guess anything else. No calculators. The original question, 5:100: 5:10 = 2x = 3db 10:100 = 10x = 10db Sum: 13db. Example: 25w up to 600. 3db is 50w 13db is 500w 600 is a little bit more. Call it 14db. Example: 12W to 80W 24 is 3db 48 is 6db 96 is 9db. So 8 is a fine guess. Dan / WG4S / K2 #2456 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Wednesday, March 30, 2005 2:21 PM To: S55M; [EMAIL PROTECTED]; [EMAIL PROTECTED]; elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: math question Im with Adi on this one..i.e NO MATH!. Although I'm 100% certain Don is correct, my fingers came with *about* a 12.6 dB increase. (I never did understand those loggers) Tom WB2QDG K2 1103 -- Original message -- From: S55M [EMAIL PROTECTED] dBm's Just remember this (no maths:))) : Every 3dB increase is power multiplied by 2 times (1W to 2W is 30dBm to 33dBm) So 1W+3dB (1x2=2) is 2W+3dB (2x2=4)4W+3dB(4x2=8)8W and so on. Every 10dB increase is power multiplied by 10 (1W to 10W is 30dBm to 40dBm 100W to 1KW is 50 dBm to 60 dBm the easy one HI) And dont care abt digits on calcullator (try to see 0,5dB on Your S-meter or ask someone on the band to change the power from 100W to 50W or from 10W to 5W (3dB) You will see practically no difference. Why dBm? Because dBm is power related to 1mW=0dBm . S55M-Adi - Original Message - From: W3FPR - Don Wilhelm [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 8:23 PM Subject: RE: [Elecraft] OT: math question dB = 10 log (P2/P1) For your example of 5 watts to 100 watts, is an increase of 13.01029996 dB - pardon the rounding but that is all the digits my calculator shows :). 73, Don W3FPR -Original Message- How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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 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] OT: math question
At 12:01 PM 3/30/05, you wrote: How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. 10 log(P2/P1) = 10 log(100/5) = 10 log(20) = 10 (1.30103) = 13.0103dB An easy 'rule of thumb' way to get a good idea of such levels is to remember that: a power INcrease of 2 = approx. +3dB change a power DEcrease of 2 = approx. -3dB change a power INcrease of 10 = +10dB a power DEcrease of 10 = -10dB So, to go from 5W to 10W output, you have 3dB GAIN to go from 10W to 100W, you have 10dB gain Since dB's can be added, going from 5W to 100W = 3db + 10 dB = 13dB Similarly, if you went from 2W to 800W... From 2W to 4W (first doubling of power) = +3dB From 4W to 8W (2nd doubling of power) = +3dB From 8W to 800W (increase of 10X) = +10dB --- Total power increase in dB = +16dB 73, Tom Hammond N0SS ___ 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] LSB/USB Audio
Remember that your filters are also used on transmit (OPT1). So go back and redo your filter aligment per the book and preferably using Spectrograph. This is most likely where your problem lies. Gregg R. Lengling, W9DHI, Un-Retired K2/100 SN 3075 http://www.milwaukeehdtv.org - Original Message - From: [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 1:28 PM Subject: [Elecraft] LSB/USB Audio Hello all. I have been setting up my transmit audio on K2 #4785 lsb/usb,ok here is what ive noticed my usb reports on the conventional usb bands 20/15/10 are great no problems also reports on lsb conventional bands 80/40 are also great. When I listen to usb on 80/40 it seems muffled and also the same is true for lsb on 20/15/10 ok this is not a issue as I keep to the lsb/usb band conventions but can someone tell me why the audio is muffled in this way is it desighned to do this. M1MGD G-QRP 11355 Elecraft K1 #1532 K2 #4785..72/73.. ___ 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] z5 resonator leads
Never trim precut to length leads such as ICs and relays, and resistor packs, or crystals. These have just enough extension thru the normal fillet of solder to not be a problem, and to provide a place to clip on for troubleshooting probes. Trimming short leads that were not designed to be trimmed, or the thicker leads on relays, inductor cans, crystals, ICs, resistor packs etc. runs the risk of fracturing the anchor point internal to the package. Always hold on to the lead being cut off to avoid shock of cutting from launching an arrow in an uncontrolled direction. This also buffers the shock of cutting the lead from affecting the component. To summarize, the only leads to trim are individual resistors and capacitors having the thin solder coated leads. Look at a few commercial built boards before you willy nilly start to build something, if you are not experienced at electronics assembly practices. Check out the library at any Engineering college and likely you can find texts on assembly practices; or check for military specifications on the web for assembly practices. 73, 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] OT: math question
I'd hoped that the responses would be far more interesting than merely looking up the answer, and I was NOT disappointed. Thanks, all! Bill K3UJ -Original Message- How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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] Fillet or not?
There are those who advocate no fillet when soldering plated thru holes. Is an obvious fillet in that instance a sign of too much solder? K3UJ === Never trim precut to length leads such as ICs and relays, and resistor packs, or crystals. These have just enough extension thru the normal fillet of solder to not be a problem ___ 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] OT: math question
I ran into a brain-teaser once, that had me baffled for hours (I won't say how many). Finally, I called my sister, the Rocket Scientist (actually, we're not _Rocket_ scientists - That's a quote from her husband) and asked her. She and Paul spent a few minutes on the problem, figured it out, but it was such a trivial answer they threw it away. Since I'd spent so long on the Question, I gave her about a week and then I called back. Luckily they'd not taken out the trash, so she easily found their notes and read them to me. I won't spoil it for you 'crafters. Dan / WG4S / K2 #2456 Problem: An alley has a 20-foot ladder across it, in the left lower corner and leaning on the right wall. There also is a 30-foot ladder, from the right lower corner leaning on the left wall. The laders cross at 10 feet high. How wide is the alley? Usual conventions: alley is all right angles, ladders have no thickness nor bends, blah blah blah... This should make some juices flow out there. Just simple geometry, or is it? PS: Iteration is cheating. Sorry Issac. snip the responses would be far more interesting than merely looking up the answer /snip ___ 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] LSB/USB Audio
If the transmit audio is fine, then maybe he doesn't want to mess with the BFO settings for position FL1. Only the BFO settings for FL1 position are used for transmit, regardless of what filter position (FL1, 2, 3 or 4) is being used in receive. Have you tried other FL positions? You can adjust the BFO frequencies for SSB FL2, FL3 and FL4 to adjust the sound of received signals without affecting your transmit audio at all. Select OPT1 for each filter, then adjust the BFO frequency for the audio quality you want. Since your transmit audio reports are FB, I'd suggest a starting point would be to set FL2 to use the SSB OPT1 filter and set the BFO frequencies identical to FL1. Now FL2 should sound just like FL1. With your frequency probe in your BFO test point, you can tune in an SSB signal, go into CAL FIL in your menu and, while listening to a signal on the air, adjust the BFO frequency for the best sounding signal. Repeat the process on a signal on a band using the opposite sideband. This will not affect your transmit audio at all. You can do the same with FL3 and FL4 if you like a variety of positions. It's sort of like passband tuning. Or you can switch FL3 and FL4 to the variable bandwidth (CW) filter and set it for narrower bandwidths to provide better QRM rejection in tough conditions, etc. Ron AC7AC -Original Message- Remember that your filters are also used on transmit (OPT1). So go back and redo your filter aligment per the book and preferably using Spectrograph. This is most likely where your problem lies. Gregg R. Lengling, W9DHI, Un-Retired - Original Message - Hello all. I have been setting up my transmit audio on K2 #4785 lsb/usb,ok here is what ive noticed my usb reports on the conventional usb bands 20/15/10 are great no problems also reports on lsb conventional bands 80/40 are also great. When I listen to usb on 80/40 it seems muffled and also the same is true for lsb on 20/15/10 ok this is not a issue as I keep to the lsb/usb band conventions but can someone tell me why the audio is muffled in this way is it desighned to do this. M1MGD G-QRP 11355 ___ 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: Fillet or not?
Absolutely do not leave out the fillet. If you have a lead that sticks out of a hole, you should have a fillet around it. That is a requirement of the NASA soldering course of years ago, but has not changed as far as I see in modern assemblies. The flush plated thru hole is OK for solder bond to a lead, but you lose the ability to clip on a test lead there. Also, if ever you have to remove the component, the extension of the lead out the plated thru hole gives you something to grab; to wiggle the lead and break the solder bonds while the solder is wet. Continued movement of the lead keeps it from reattaching as the solder cools, and facilitates removing the old component. I think having a test point is as important as any of the other reasons for not cutting leads flush. Besides, the board has leaded components that will stick thru and should not be cut, (are not designed to be cut) as I mentioned in the earlier post. Those automatically determining that some leads protrude thru the bottom of the board. Now anyone is free to do what they want, but if I got a unit in my shop years ago to repair that had been assembled with leads cut flush, I would have to charge more for the aggravation of working on it, or refuse to service it. In building electronics, you should always design, lay out, and assemble to facilitate future repairs. Unfortunately, much of today's consumer electronics is built to throw away, but I doubt most hams would want to do that with their kit when it has a simple failure that soldering in a new component would fix. I have followed the above in both design, modification, and selection of professional science equipment for 45 years, and found that years after something was obtained, attention to reparability saved the day when we had to fix it. -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] USB/LSB Audio
Thanks for the comments Ron. Ok ive just revisited my posting i didn't make it clear that I am monitoring my own recorded tx audio via recording with opt1 on rx/tx . M1MGD G-QRP 11355 Elecraft K1 #1532 K2 #4785..72/73.. ___ 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] Fillet or not?
There are those who advocate no fillet when soldering plated thru holes. Is an obvious fillet in that instance a sign of too much solder? K3UJ === With Elecraft's plated-through holes, it's at least a sign of more than enough solder. When soldering boards without plated-through holes, it's virtually impossible to have good solder flow without something of a fillet because the solder only has the copper around the opening of the hole to bond with. On Elecraft boards, if the lead is soldered *in* the hole, there's no need at all for any fillet to rise above the hole. If you're having trouble making fillets when you solder, use a smaller-diameter solder. For Elecraft boards, I never use anything bigger than .031 and I prefer .025 diameter. It's not a big deal on most solder pads, but there are places where it can cause real grief. A common one in the K2 is when soldering crystals. Excess solder will form a fillet under the crystal where you can't see it. More than one builder has agonized over a non-functioning rig until one of those hidden fillets was found under a crystal shorting out the signal path. It was a tough one to troubleshoot and was found only by removing the crystal, cleaning off the excess solder, and re-installing it. Other kits, like the KX1 and the T1, have some very close spacing in places that require virtually no bump on the soldered side of some boards for the unit to fit together and avoid shorts. Ron AC7AC ___ 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] OT: math question
Yes math is beautifull (callculating needed space for 3d antennas HI. But google can spare some time and paper. :) http://home.att.net/~numericana/answer/algebra.htm#quartic - Original Message - From: Dan Barker [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Elecraft elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 10:22 PM Subject: RE: [Elecraft] OT: math question I ran into a brain-teaser once, that had me baffled for hours (I won't say how many). Finally, I called my sister, the Rocket Scientist (actually, we're not _Rocket_ scientists - That's a quote from her husband) and asked her. She and Paul spent a few minutes on the problem, figured it out, but it was such a trivial answer they threw it away. Since I'd spent so long on the Question, I gave her about a week and then I called back. Luckily they'd not taken out the trash, so she easily found their notes and read them to me. I won't spoil it for you 'crafters. Dan / WG4S / K2 #2456 Problem: An alley has a 20-foot ladder across it, in the left lower corner and leaning on the right wall. There also is a 30-foot ladder, from the right lower corner leaning on the left wall. The laders cross at 10 feet high. How wide is the alley? Usual conventions: alley is all right angles, ladders have no thickness nor bends, blah blah blah... This should make some juices flow out there. Just simple geometry, or is it? PS: Iteration is cheating. Sorry Issac. snip the responses would be far more interesting than merely looking up the answer /snip ___ 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] OT: math question
I always like to ask... Is this a trick question? The way the problem is worded (and if I understand your geometry correctly) implies an infinite number of solutions as long as the 20 foot ladder can span the alley. Therefore, the width is anything less than or equal to 20 feet. Al. - Original Message - From: Dan Barker [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Elecraft elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 2:22 PM Subject: RE: [Elecraft] OT: math question I ran into a brain-teaser once, that had me baffled for hours (I won't say how many). Finally, I called my sister, the Rocket Scientist (actually, we're not _Rocket_ scientists - That's a quote from her husband) and asked her. She and Paul spent a few minutes on the problem, figured it out, but it was such a trivial answer they threw it away. Since I'd spent so long on the Question, I gave her about a week and then I called back. Luckily they'd not taken out the trash, so she easily found their notes and read them to me. I won't spoil it for you 'crafters. Dan / WG4S / K2 #2456 Problem: An alley has a 20-foot ladder across it, in the left lower corner and leaning on the right wall. There also is a 30-foot ladder, from the right lower corner leaning on the left wall. The laders cross at 10 feet high. How wide is the alley? Usual conventions: alley is all right angles, ladders have no thickness nor bends, blah blah blah... This should make some juices flow out there. Just simple geometry, or is it? PS: Iteration is cheating. Sorry Issac. snip the responses would be far more interesting than merely looking up the answer /snip ___ 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] Operating in Rome,Italy... Pointers?
Hi folks, It looks like the K2 and I will get a free trip to Rome (the one in Italy) sometime soon courtesy of the employer. I have never operated in Europe before and would like some insights and tips you might have. I will have power (220 and 120 VAC) and some room for a small antenna on a rooftop at our location. I own a Shakespeare AT-1011U 32 foot vertical but it's heavy and clumsy to travel with and needs a substantial mount. I can easily send some 20 foot crappie poles along and find a way to secure them. The K2 has the ATU installed so it will tune just about anything. I'd appreciate technical tips, but I'm also desperate for operating advice. I could be leaving in a few days or a few weeks. Please share what you know. Thanks in advance! 73, Lonnie NY2LJ ___ 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] OT: math question
Hmmm ... never seen square root as O with dot-dot on top. Jamie WB4YDL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of S55M Sent: Wednesday, March 30, 2005 2:47 PM To: Elecraft Subject: Re: [Elecraft] OT: math question Yes math is beautifull (callculating needed space for 3d antennas HI. But google can spare some time and paper. :) http://home.att.net/~numericana/answer/algebra.htm#quartic - Original Message - From: Dan Barker [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Elecraft elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 10:22 PM Subject: RE: [Elecraft] OT: math question I ran into a brain-teaser once, that had me baffled for hours (I won't say how many). Finally, I called my sister, the Rocket Scientist (actually, we're not _Rocket_ scientists - That's a quote from her husband) and asked her. She and Paul spent a few minutes on the problem, figured it out, but it was such a trivial answer they threw it away. Since I'd spent so long on the Question, I gave her about a week and then I called back. Luckily they'd not taken out the trash, so she easily found their notes and read them to me. I won't spoil it for you 'crafters. Dan / WG4S / K2 #2456 Problem: An alley has a 20-foot ladder across it, in the left lower corner and leaning on the right wall. There also is a 30-foot ladder, from the right lower corner leaning on the left wall. The laders cross at 10 feet high. How wide is the alley? Usual conventions: alley is all right angles, ladders have no thickness nor bends, blah blah blah... This should make some juices flow out there. Just simple geometry, or is it? PS: Iteration is cheating. Sorry Issac. snip the responses would be far more interesting than merely looking up the answer /snip ___ 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: Re: [Elecraft] Operating in Rome,Italy... Pointers?
Stuart, I've checked the ARRL and there is a bunch of info. I guess that I'm really asking for local knowledge or personal experience. Thanks es 73, Lonnie NY2LJ From: Stuart Rohre [EMAIL PROTECTED] Date: Wed Mar 30 15:02:34 CST 2005 To: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: Re: [Elecraft] Operating in Rome,Italy... Pointers? Check out ARRL web site: ARRL.org for pointers on international operations. -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] OT: math question
James C. Hall, MD wrote: Hmmm ... never seen square root as O with dot-dot on top. Right, they should have printed it as dah-dah-dah-dit ;-P Sorry, couldn't resist this one 8-) B73, Andrea. -- Homepage: http://andrea.borgia.bo.it /Amateur radio: IZ4FHT ___ 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] OT: math question
I like simple, 10Db gain will go from 5 to 50Watts; 3Db more will double 50 to 100 Watts. Approximately 13 Db -- 73 Chuck AA8VS www.aa8vs.org/aa8vs FP #113 MI-QRP #1212 SOC #445 Firebird #2117 TSARC #3952 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, March 30, 2005 1:02 PM To: elecraft@mailman.qth.net Subject: [Elecraft] OT: math question How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. K3UJ ___ 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] Operating in Rome,Italy... Pointers?
[EMAIL PROTECTED] wrote: I'd appreciate technical tips, but I'm also desperate for operating advice. For starters, here is a PDF document with the bandplan: http://www.arimi.it/bandplan/BP5_0LHVU.pdf (Please note this is _not_ an official document, rather a compilation of regulations, recommendations and just plain good advices) Other than that, you should of course bring your own license (possibly with some note to the effect that it is equivalent to CEPT TR/61-01 class 1) and identify yourself as I0/NY2LJ or such like (not sure about the prefix, as we have I0, IK0 and IZ0 for class 1). This assuming they let you board the plane with the K2 in the first place... K2, C4, who knows the difference? ;-) B73, Andrea (in Bologna). -- Homepage: http://andrea.borgia.bo.it /Amateur radio: IZ4FHT ___ 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] Fillet or not?
I always feel more comfortable with a fillet. Without a fillet it's much more difficult to inspect the lead to be sure you have solder completely surrounding the lead. It's possible to have the hole partially filled with solder so it looks ok from one angle but the lead is not securely connected. This may be hard to see. A fillet is easier to inspect. If the height of the lead sticking out of the board is critical, it's no extra trouble to trim the fillet along with the lead. 73/ Bob - W5BIG - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 2:21 PM Subject: [Elecraft] Fillet or not? There are those who advocate no fillet when soldering plated thru holes. Is an obvious fillet in that instance a sign of too much solder? K3UJ ___ 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] OT: math question
I'll go with an alley of zero width. best wishes, dave belsley, w1euy On Mar 30, 2005, at 3:22 PM, Dan Barker wrote: I ran into a brain-teaser once, that had me baffled for hours (I won't say how many). Finally, I called my sister, the Rocket Scientist (actually, we're not _Rocket_ scientists - That's a quote from her husband) and asked her. She and Paul spent a few minutes on the problem, figured it out, but it was such a trivial answer they threw it away. Since I'd spent so long on the Question, I gave her about a week and then I called back. Luckily they'd not taken out the trash, so she easily found their notes and read them to me. I won't spoil it for you 'crafters. Dan / WG4S / K2 #2456 Problem: An alley has a 20-foot ladder across it, in the left lower corner and leaning on the right wall. There also is a 30-foot ladder, from the right lower corner leaning on the left wall. The laders cross at 10 feet high. How wide is the alley? Usual conventions: alley is all right angles, ladders have no thickness nor bends, blah blah blah... This should make some juices flow out there. Just simple geometry, or is it? PS: Iteration is cheating. Sorry Issac. snip the responses would be far more interesting than merely looking up the answer /snip ___ 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] USB/LSB Audio
Thanks for the comments Ron. Ok ive just revisited my posting i didn't make it clear that I am monitoring my own recorded tx audio via recording with opt1 on rx/tx . M1MGD G-QRP 11355 Elecraft K1 #1532 K2 #4785..72/73.. -- Let's see if I understand. When you record your own transmitted audio, does it sound muffled to you? If so, how are you monitoring your audio? Is it on another receiver? If you are playing a recorder into the K2 mic input, be careful not to over-drive the audio input. The system will try to reduce the gain, but it can be very easily overloaded. Also, a big impedance mis-match such as between the low-impedance phones or speaker output of a recorder and the 1 k mic input impedance of the K2 can cause change in the audio characteristics of the signal. I check my audio by listening to my own signal on a separate receiver as generated by speaking into my microphone and recording it, then playing back the recording. That ensures that what I'm transmitting is the same as what I'd transmit in a QSO. The trick is to properly tune in your signal on the auxiliary receiver. If you are able to zero beat a CW signal using SPOT on your K2, you can use a similar technique to tune in your auxiliary receiver precisely. Listen to the auxiliary receiver using headphones at a level where you can hear your own voice comfortably when transmitting into a dummy load with your K2. Now whistle or hum into the mic. As you adjust your auxiliary receiver tuning, you'll hear a beat between your voice and the received signal. Tune for zero beat. That ensures that your are precisely tuned in on the auxiliary receiver. You want to be close to the right tuning before doing that. Voices have very rich harmonic energy, and it's easy to tune into a harmonic. If you hum at 500 Hz, it's easy to tune in 1 kHz off, although it's pretty obvious when you listen to yourself talk! Get the tuning as close as you can, then hum and listen for the beat. Now record your signal as received. I use my computer. A tape recorder will do FB as well. My experience with the standard Elecraft OPT 1 filter is that the setting of the BFO frequency is critical. The bandwidth of the filter is set near the minimum for good voice intelligibility, because that give the signal the greatest strength, or punch. That's especially important for QRP operators. But just a small change in the BFO frequency has a very large effect on the intelligibility of the signal. A little one way and the signal is 'tinny' and a bit the other and it's 'muffled'. Try adjusting your BFO frequency to move the filter bandpass further from the carrier. I have my filters set to roll off at about 400 Hz on the low end. After I did that my audio was okay, but I eventually modified my K2 for the wider bandwidth filter as described on the Elecraft web site. I was much happier with the sound of my K2 after doing that on both transmit and receive. I like to do a little A.M. Broadcast band DX-ing with my K2 from time to time and, listening on headphones with my wider SSB filter, it's hard to tell the difference between a broadcast station received on the K2 and one received on many broadcast band receivers. Changing the bandwidth involves changing the capacitor values in the filter. You use the same crystals. John, KI6WX, developed a couple of optional bandwidths for the OPT 1 filter you can select by installing the correct capacitors. The capacitor values are standard sizes. If you don't have access to the right value caps where you are you can order SSBCAPKT from Elecraft. Ron AC7AC ___ 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] OT: math question
That can't be right. Drawing it (roughly) on paper shows it to be around 13 feet wide, give or take a foot or so. But coming up with a precise equation takes more math skills than high school left me with... Bill K3UJ In a message dated 3/30/2005 4:51:20 P.M. Eastern Standard Time, [EMAIL PROTECTED] writes: I'll go with an alley of zero width. best wishes, dave belsley, w1euy ___ 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] OT: math question
Hi Frank: Thanks pal... guess I got a bit ahead of myself there! Of course, you're completely correct! Should have been 26db, instead of 16dB! 73, Tom At 03:54 PM 3/30/05, you wrote: Hi Tom, Just a small correction to your 2W to 800W example: From 2W to 4W (first doubling of power) = +3dB From 4W to 8W (2nd doubling of power) = +3dB From 8W to 80W (increase of 10X) = +10dB From 80W to 800W (increase of 10X) = +10dB Total = 3+3+10+10 = 26db Best 73, Frank - W6NEK - Original Message - From: Tom Hammond [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Wednesday, March 30, 2005 11:01 AM Subject: Re: [Elecraft] OT: math question At 12:01 PM 3/30/05, you wrote: How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. 10 log(P2/P1) = 10 log(100/5) = 10 log(20) = 10 (1.30103) = 13.0103dB An easy 'rule of thumb' way to get a good idea of such levels is to remember that: a power INcrease of 2 = approx. +3dB change a power DEcrease of 2 = approx. -3dB change a power INcrease of 10 = +10dB a power DEcrease of 10 = -10dB So, to go from 5W to 10W output, you have 3dB GAIN to go from 10W to 100W, you have 10dB gain Since dB's can be added, going from 5W to 100W = 3db + 10 dB = 13dB Similarly, if you went from 2W to 800W... From 2W to 4W (first doubling of power) = +3dB From 4W to 8W (2nd doubling of power) = +3dB From 8W to 800W (increase of 10X) = +10dB --- Total power increase in dB = +16dB 73, Tom Hammond N0SS ___ 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] OT: math question
For convenience, Mini-Circuits has a nice printable conversion table at http://www.mini-circuits.com/dg03-110.pdf Larry N8LP Tom Hammond wrote: At 12:01 PM 3/30/05, you wrote: How would one calculate the amplifier gain (in dB) required to go from one power level to another? For example from 5W to 100W. 10 log(P2/P1) = 10 log(100/5) = 10 log(20) = 10 (1.30103) = 13.0103dB An easy 'rule of thumb' way to get a good idea of such levels is to remember that: a power INcrease of 2 = approx. +3dB change a power DEcrease of 2 = approx. -3dB change a power INcrease of 10 = +10dB a power DEcrease of 10 = -10dB So, to go from 5W to 10W output, you have 3dB GAIN to go from 10W to 100W, you have 10dB gain Since dB's can be added, going from 5W to 100W = 3db + 10 dB = 13dB Similarly, if you went from 2W to 800W... From 2W to 4W (first doubling of power) = +3dB From 4W to 8W (2nd doubling of power) = +3dB From 8W to 800W (increase of 10X) = +10dB --- Total power increase in dB = +16dB 73, Tom Hammond N0SS ___ 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] OT: math question
On Wed, 30 Mar 2005, S55M wrote: Yes math is beautifull (callculating needed space for 3d antennas HI. But google can spare some time and paper. :) http://home.att.net/~numericana/answer/algebra.htm#quartic ANd now I know why my daughters always hated math, and why I never passed the test to get recruited by various federal agencies. I(we) are dumb. 73 Thom ___ 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] OT: math question
Well, Bill, my first answer of zero feet width is, in fact, a correct answer, albeit rather degenerate. It was an answer that came immediately to mind. However, there is a nondegenerate answer, which is approximately 12.3119 feet. best wishes, dave belsley, w1euy That can't be right. Drawing it (roughly) on paper shows it to be around 13 feet wide, give or take a foot or so. But coming up with a precise equation takes more math skills than high school left me with... Bill K3UJ In a message dated 3/30/2005 4:51:20 P.M. Eastern Standard Time, [EMAIL PROTECTED] writes: I'll go with an alley of zero width. best wishes, dave belsley, w1euy___ 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 AND SHACKLOG
Is anyone using a K2 with 5B4AHR's (G3PMR) Shacklog logging program, please? 73 de Chris, W4/G4BUE -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.8.4 - Release Date: 27/03/2005 ___ 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] Logging 4U1WB
Hi My (approx 5 year old) countries list from ARRL lists 4U_ITU (the ITU) and 4U_UN (the UN) as separate countries. It doesn't list 4Uanything else as a separate prefix. I worked 4U1WB (the World Bank) this weekend in the WPX test. Is 4U1WB another country for DXCC purposes? 73, Lenny W2BVH ___ 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] (no subject)
Hello all, Due to a forecast calling for rain and wind late afternoon on Thursday, we will leave PA around 7:30am and should be on the air by 10am or so at Turkey Point Lighthouse ARLHS USA-857. Also look for us on the air Thursday evening on 3.970mhz and 3.530 mhz at Concord Point Lighthouse in MD. It's been really hard to operate and stay dry lately! I've been receiving emails from the local hams down there wishing to visit us at the lighthouse on Friday, but it might rain. We will activate both lights regardless of the weather! I already packed my rain gear in my backpack and a tarp to setup under at Turkey Point Light. 72/73, Ed, WA3WSJ ARLHS # 983 ___ 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] Logging 4U1WB
On Wed, Mar 30, 2005 at 08:11:05PM -0500, w2bvh wrote: Hi My (approx 5 year old) countries list from ARRL lists 4U_ITU (the ITU) and 4U_UN (the UN) as separate countries. It doesn't list 4Uanything else as a separate prefix. I worked 4U1WB (the World Bank) this weekend in the WPX test. Is 4U1WB another country for DXCC purposes? It counts as the U.S. Bob, N7XY ___ 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 Hakko question
I have a Hakko soldering reel holder. It has a ground screw for a ground wire. I thought it was for grounding to your ground rod but the pic shows your supposed to clip it to the circuit board your soldering on. does it matter? WT5Y ___ 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 alignment and test part 2
I have made it to page 57, PLL Reference Oscillator Range Test. My high Freq is 12098.42 low freq is 12085.21 Range = 13.21 kHz So the range is not between 9.8 and 13 kHz, and I must refer to Troubleshooting. I'm stumped. To exactly where in the Troubleshooting section are they referring? Similarly, for the VCO Test, the freq counter reads 10690.74. It is fairly stable, but not between 8 and 10 MHz. Again, exactly where in the Troubleshooting section am I supposed to go? (This refers to Manual Rev E, Feb 16, 2003. s/n is 3460) jh ___ 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
