Re: [Elecraft] KPA500 Parts
The real question is/was what value of zener. > On 08/17/2022 9:45 AM Andy Durbin wrote: > > > "The latest revision of the schematic for the KPA500 TR Switch shows a Zener > diode at the gate of Q4 in place of R3, the 100K resistor previously." > > What is the latest revision? I have Rev D which is later than any I have > found on-line but it shows R3 not a Zener. > > Andy, k3wyc > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Issue
In the attached email Frank W2yk wrote the 1A2R from 404A. I only find a 403. Please advise Ralph, w7HSG/AFA9RT > On 04/01/2022 9:48 AM Rick Bates, NK7I wrote: > > > It does. But you HAVE to remember to send a dit on each band change so > the amp knows where you are. > > 73, > Rick NK7I > > > On 4/1/2022 8:46 AM, Frank Scolaro wrote: > > Jim,. > > > > I use the "1A2R" (one amp tw0 radios) from 4O4A. I have two rigs share my > > KPA1500. However, if the rigs are on different bands, you do need to rely > > on frequency sensing by the amp. Not sure if the KPA500 does that. > > > > GL > > Frank, W2YK > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: RF interference from grow lights.
Hi I had a similar situation here in Tucson AZ My spectrum analyzer,a Tek 492 showed groups of carrier like indications 10-20 db above the noise floor. First think I thought "Grow Lights" I was told that the osculator in a grow light is about 2.3 Mhz. The interference looked like it was every 2.3Mhz up the band. Levels were all over the place. Called the local Power Co and after lots of pleading they finally sent a tech to check it out. He connected up to my dipole antenna and looked at the pattern and concluded it was a ground connection proble. Got a crew out the next week and traced it to a pole out about 2000ft from me. The problem was radiating from the HV line for about 2 miles. Fixed the ground and problem solved. I had traced to one of three poles using a portable radio tuned the my main problem freq of about 5.2 Mhz and was able to hear the problem. The main problem was a loose ground clamp up on the pole. The power company also used an acoustic parabolic mike which pin-pointed the exact connector. New connector problem solved Ralph, W7HSG/AFA9RT > On 08/20/2020 7:07 PM ab2tc wrote: > > > Hello all, > > https://www.edn.com/how-cops-are-finding-grow-ops-with-am-radios/ > > The above is a link to an article in the EDN magazine (a technical journal > primarily aimed at EEs). The article is more than five years old, but maybe > it is only recently this type of interference has started to show up in > upstate New York. I have one of these noise sources somewhere in my > neighborhood (it’s not that easy to pinpoint due to the low frequency). I > know this is OT and maybe somewhat controversial, but this type of strong > interference is of great concern to the amateur radio community. I am not > after anybody in my neighborhood getting arrested, but I very much want to > see the interference stop. Even if the operation is legal, the emission is > definitely way outside FCC part 15 limits. Quote from the article: > > “..conducted emission data clearly shows peaks as high as 100+ dBuV (50 dB > over the limit) in the range 6 to 8 MHz, with lower peaks at 14, 18, and 21 > MHz.” > > My interference is primarily in the 7MHz band. 14 MHz is virtually free of > it. See here for a screenshot: > > http://www.ab2tc.com/growlights.png > > There are three peaks, approximately 49 to 50kHz apart. The center one is > centered under the cross hair cursor. As you can see, the band is starting > to come to life at about 2:30 in the afternoon. The interference is on 24/7 > as far as I can tell. > > Does anybody have any experiences like this and/or any suggestions what to > do? If you want to keep this confidential, E-mail me privately. My E-mail > address is OK on qrz.com. > > AB2TC – Knut > > PS. I have previously reported power line noise to the electrical company > and have had positive responses (fixes) from them. I suspect that this kind > of interference is not easily detectable on their UHF based sniffers; > besides I am not sure if conducted interference from residences lies under > their jurisdiction (there are only residences here for many blocks). > > > > > > -- > Sent from: http://elecraft.365791.n2.nabble.com/ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K4
Wayne et all My only concern before I order a K4 is how it will work with two high power AM transmitters near me. 10KW day,1kw night KVOI south of me and a 50kw day only KUAT AM north of me. At some time, I will need to borrow or rent a k4 for a week and see how it behaves The majority of my operation is between 2-3.5 Mhz, 4 to 7mhz, 7.3-10mhz, 11mhz to14mhz. I also use my radio on most ham bands. I currently use a K3 with all bells and 1000MP The MP seems to handle the intermod better then the k3 The intermod is not caused within the radios but cause by rusty chainlink fence, poor power line grounds etc. My antennas are not the problem. I tried a sharp cutoff filter for everything below 3.5mhz. No positive measurable results. Ralph, W7HSG, AFA9RT 520-444-6610 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 Features and current K3+
I can not use the digital modes because I need to switch to Upper SB after the last electron has been sent in the digital mode and the reverse. Call is instant break in between USB voice and digital M110 A This could be a deal breaker on a K4 purchase. Ralph, W7HSG/AFA9rt > On September 20, 2019 at 12:52 PM Jim Rhodes wrote: > > > That is the way my old TS-570 is but my K3 has only 1 ptt line, but if I am > not mistaken in digital modes the mic is muted. I am not sure of that since > I hardly ever have a mic plugged in, but I think that is what I read in the > book. > > Jim Rhodes > K0XU > > On Fri, Sep 20, 2019, 09:05 Andy Durbin wrote: > > > "I need to be able to switch from digital (M110A) to voice on a moments > > notice so can not use the digital modes. The mike is hot while > > transmitting digital. Most mikes leave the mike element hot. The PTT is a > > SPST switch. This means that you have to be careful not to have any noise > > in the shack while transmitting digital. If there is a way on the K3, > > service was not able to point it out." > > > > It would be very surprising to me if K3 and K4 had such a limitation. > > This situation is handled perfectly in the Kenwood TS-590 by using 2 > > distinct keying commands. Front panel PTT is equivalent to CAT TX0; and > > takes modulation from the front panel mic jack. TX1; and the equivalent > > ACC hardware PTT, take modulation from the USB Audio CODEC or ACC analog > > audio input leaving the mic muted. > > > > Switching between front mic and digital is simply accomplished by > > asserting the appropriate PTT line or CAT command. The digital mode > > application asserts TX1; Keying mode cannot be changed while transmitting > > so first keying command wins until TX stops. > > > > 73, > > Andy, k3wyc > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to jimk...@gmail.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 Features and current K3+
A feature that should be included in the "K4" is a software addition that will allow one to send digital via the rear audio in connector while operating USB (upper sideband) with the front mike. I use the current K3+ on AirForce/Army Mars. I need to be able to switch from digital (M110A) to voice on a moments notice so can not use the digital modes. The mike is hot while transmitting digital. Most mikes leave the mike element hot. The PTT is a SPST switch. This means that you have to be careful not to have any noise in the shack while transmitting digital. If there is a way on the K3, service was not able to point it out. Ralph, W7HSG/AFA9RT > On September 19, 2019 at 8:51 PM Wayne Burdick wrote: > > > Just in case there's any doubt, the K4 has a complete, > multiplatform-compatible sound card interface via its USB-B connector, with > two virtual control ports and stereo digital audio. That's in addition to > three USB-A ports, true RS232 via DE9 for legacy station interfaces, full > analog audio I/O, HDMI, and the usual ACC jack. It's a superset of the KIO3B. > > 73, > Wayne > N6KR > > > > On Sep 19, 2019, at 7:16 PM, Eric Garner wrote: > > > > One thing it buys you is compatibility with user expectations. The K3s has > > a builtin USB sound card, so leaving it out of the K4 would not meet user > > expectations of what flagship rig like the K4 should look like. Considering > > there's a USB sound card built into most modern rigs now, it would look bad > > when comparing them. > > > > I can even hear the whining and moaning now "You are telling me that the > > IC-7300, which costs less than a quarter of the price of the K4 has a > > built-in sound card and the K4 does not?" > > > > -Eric > > > > On Tue, Aug 20, 2019 at 11:48 AM David Gilbert > > wrote: > > > >> > >> What does the built in sound card buy you? You don't save on cabling > >> and USB sound card dongles for the computer are small, cheap, and work > >> fine for digital modes. > >> > >> 73, > >> Dave AB7E > >> > >> > >> > >> On 8/20/2019 11:15 AM, Carl Jón Denbow wrote: > >>> I would like to see a built-in sound card for digital modes. As far as > >> I know there is no small, portable rig that has this feature. I do expect > >> that a KX4 is either on the drawing boards or at least has been discussed > >> by the Elecraft brain trust (aka Eric & Wayne). 73 de Carl > >>> > >>> Sent from my iPhone > >>> === > >>> Carl Jón Denbow, N8VZ > >>> 17 Coventry Lane > >>> Athens, Ohio 45701-3718 > >>> > >>> c...@n8vz.com > >>> www.n8vz.com > >>> EM89wh > >>> > >>> IRLP 4533 Echolink 116070 > >>> > >>> PSK and JT65 Forever! > >>> === > >>> > On Aug 20, 2019, at 1:48 PM, Tox wrote: > > Yep. If you were looking for a sequel to the KX3, the answer appears > to have been: > smaller > lighter > capable of usage in an HT manner > lithium batteries > ...and delivered as the KX2 :) > > > On Tue, Aug 20, 2019 at 10:18 AM Nr4c wrote: > > > > I think you’re going to have to wait a bit for this one. The KX2 kinda > >> slipped in there with a lot of bang fit the buck. And in a real small > >> package. > > > > Sent from my iPhone > > ...nr4c. bill > > > > > >> On Aug 20, 2019, at 12:55 PM, Doug Hensley wrote: > >> > >> With the KX3 now aging from its 2012 debut, has anyone heard what > >> might be on the > >> planning board for a KX4 ? Inquiring minds . . . . . > >> > >> If you are a KX3 user, what would you like to see? > >> > >> Cheers, > >> > >> Doug W5JV > >> K1, K2, K3s > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds. > >> Looking for something special? Ask us. > >> Wanted: Petersen Type PR-1 in FT-243 holder cut for 1770 kHZ (Used in > >> IF Stage of a Mackay Receiver). > >> > >> > >> > >> > >> > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to n...@widomaker.com > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to
Re: [Elecraft] KPA500/KPA1500 General Coverage?
Mike When you get a reply, please share. I use a KPA500 with a KAT500 on Mars freq from 2-3.5 Mhz, 4-7.5 mhz and 8.5 to 14Mhz. I have never noticed any problems but I have never checked anything other does it work and stay within its operational numbers. Ralph, W7HSG/AFA9RT > On August 26, 2019 at 12:11 AM Michael Tope wrote: > > > Hi All, > > I have some work colleagues who need to test some HF components with a > few hundred watts of CW power, perhaps a little more depending on what > they find. I think this would mostly be in the 7 to 11 MHz range and > perhaps at the 2nd and third harmonics of this range. Will my KPA500 > work for this? How about the KPA1500? What about the rest of the 1.8 to > 30 MHz range? Are there any excluded ranges in the coverage of these two > amplifiers? > > Thanks, > > Mike W4EF.. > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Reflector test
Testing to see if My email shows up. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fwd: K4 SDR version
Thanks Joe I am more concerned if the SDR front end will be overloaded. The spurs are a work in progress. If it rained once a week, I would not have any spurs. Ralph > On July 23, 2019 at 12:31 PM "Joe Subich, W4TV" wrote: > > > > On 2019-07-23 12:54 PM, RALPH TURK wrote: > >> My question is how well will the K4 perform in this environment > > If the mixing is occurring external to your transceiver - you say: > > >> The only problem with the K 3 is caused by rusty fences etc > >> radiating a mix between stations. > > The K4 will perform the same as the K3 as once the spurs are created > externally there is nothing the transceiver can do to reject them. > > 73, > > ... Joe, W4TV > > > On 2019-07-23 12:54 PM, RALPH TURK wrote: > >> Greetings > >> > >> > >> I live between 2 AM Broadcast stations. First Station KVOI 1030 AM @ 10 > >> KW day, 1kw night 2 miles south. > >> > >> > >> Second StationKUAT 1550 AM @ 50KW day time only. No night time power 2 > >> miles north. > >> > >> > >> My question is how well will the K4 perform in this environment The only > >> problem with the K 3 is caused > >> > >> > >> by rusty fences etc radiating a mix between stations. Day time 75 -80 not > >> usable some of the time. > >> > >> > >> This is not a overload problem, just spurs. > >> > >> > >> Ralph, W7HSG > >> > >> > >> 520-444-6610 > >> > >> > >> > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to li...@subich.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] test
This is a test of Plain text __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] test
This is a test of HTML Ralph, W7HSG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Fwd: K4 SDR version
> Greetings > > > I live between 2 AM Broadcast stations. First Station KVOI 1030 AM @ 10 KW > day, 1kw night 2 miles south. > > > Second StationKUAT 1550 AM @ 50KW day time only. No night time power 2 > miles north. > > > My question is how well will the K4 perform in this environment The only > problem with the K 3 is caused > > > by rusty fences etc radiating a mix between stations. Day time 75 -80 not > usable some of the time. > > > This is not a overload problem, just spurs. > > > Ralph, W7HSG > > > 520-444-6610 > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K4 SDR version
__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KIO3B usb com port not communicating
Raj Check the RJ45 jack very carefully. One of the wires might have bent slightly and shorts out the adjacent wire. I have found that a few times when repairing computer problems for friend & family Ralph, W7HSG/AFA9RT > On July 19, 2019 at 12:32 PM Rajiv Dewan wrote: > > > Hello all, especially Don, > > The last tip helped make progress. I unplugged the P3 connected via > the RJ45 jack and suddenly my USB/CAT came back to life. > >And, this disruption is repeatable. Plug the P3 back and again it > stops working. Unplug, works again. > >Now, I will look to see what is up with the P3. I checked the > firmware on the P3. It is running the latest. > >Raj > > -- > Raj Dewan, N2RD > rdew...@rochester.rr.com > > -- Original Message -- > From: "Don Wilhelm" > To: "Rajiv Dewan" > Sent: 7/19/2019 1:32:38 PM > Subject: Re: [Elecraft] KIO3B usb com port not communicating > > >Raj, > > > >Email supp...@elecraft.com > > > >73, > >Don W3FPR > > > >On 7/18/2019 10:03 AM, Rajiv Dewan wrote: > >>Hello, > >> > >>I have KIO3B (USB interface) in my K3. It was working well. Single USB > >> for audio, and CAT. > >> > >>Suddenly, now the CAT part is not working. Here are some aspects: > >>* RS232 in K3/Config shows USB > >>* Serial port 1 shows up in device manager on the windows computer when the > >>USB is plugged in. The sound codecs are working. > >>* Nothing communicates with the K3 CAT any more (K3 utility, and logging > >>programs do not see the K3 on the com1.) > >>* I tried it on a new laptop with a fresh USB cable. Exactly the same > >>issue. > >> > >>Any help appreciated. > >> > >>Raj, N2RD > >>K3 sn 170 > >> > >>-- Raj Dewan, N2RD > >>rdew...@rochester.rr.com > >>__ > >>Elecraft mailing list > >>Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>Help: http://mailman.qth.net/mmfaq.htm > >>Post: mailto:Elecraft@mailman.qth.net > >> > >>This list hosted by: http://www.qsl.net > >>Please help support this email list: http://www.qsl.net/donate.html > >>Message delivered to donw...@embarqmail.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K4
Will the k4 with Mars software transmit from 1.8 through 30 Mhz with no band stop like the K3 has at the IF freq? Ralph, W7HSG/AFA9RT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Totally
Wes It has been snowing since about 7am just across the Mtns in Cortaro. Ralph, W7HSG > On February 22, 2019 at 7:18 AM Wes wrote: > > > This week it's rodeo days in Tucson. A favorite of the snowbirds. This > morning > however, it seems the snowbirds brought the snow with them. Yep, it's > snowing > in Tucson. Not looking forward to "rush" hour. > > Wes N7WS > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA1500 vs SPE Amps
SHOW HOW/EXPLAIN ETC. I AM VERY INTERESTED. RALPH,AFA9RTI AM NOT SHOUTING KEY BOARD STUCK > On February 12, 2019 at 7:06 PM Ken K6MR wrote: > > > “Actually, I suppose one could drive 2 KPA500's > from one K3 and sum the output for a virtual KPA1000.” > > > > Yes you can. I have been doing this for the last 3 years. > > > Ken K6MR > > > > > From: elecraft-boun...@mailman.qth.net on > behalf of Fred Jensen > Sent: Tuesday, February 12, 2019 2:45:49 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA1500 vs SPE Amps > > At the same time? [:-) Actually, I suppose one could drive 2 KPA500's > from one K3 and sum the output for a virtual KPA1000. > > 73, > Fred ["Skip"] K6DGW > Sparks NV DM09dn > Washoe County > > On 2/12/2019 1:44 PM, Dave wrote: > > Also, I’m wondering if anyone has run their KPA500 and a KPA1500 off of the > > same K3? If so, how did you set it up? > > > > Tnx es 73, > > Dave N8AG > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to k...@outlook.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Spontaneous HI CURR, audio reduction in RX mode
Harbor Freight Hand held IR laser thermometer is your best friend. Hold trigger, aim visible light, read surface temperature. Ralph ,W7HSG > On February 6, 2019 at 8:59 PM Mike K8CN wrote: > > > Thanks, Keith, for the pointer on audio IC U1 on the DSP board. Visual > inspection shows no obvious sign of overheating on the IC or the DSP board > itself. Will have to find a thermometer with a fine tip probe to measure > surface temperature on U1 though - household thermometers I have are too > large to fit into that space. > > 73, > Mike, K8CN > > > > -- > Sent from: http://elecraft.365791.n2.nabble.com/ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft CW Net Announcement
What time & Freq is the Elecraft SSB net on? Ralph,W7HSG 520-444-6610 Ralph S. Turk, > On February 2, 2019 at 10:51 PM kevinr wrote: > > > Good Evening, > > Tomorrow we are due for a snow storm. Somewhere between six and > eight inches before it ends. Hopefully it will not effect the power. > But the chances of me losing power between nets gets higher as the storm > increases. So we'll see what happens. If I am not around for either > net you'll know why. However, you can never depend on their predictions > of snow. > > The clouds have been making interesting patterns to my west. For the > last week there have been a series of mixing spirals. They cover ten > degrees of latitude or more. If you are interested you can see them > here: www.ssd.noaa.gov/goes/west/weus/vis-l.jpg > > Please join us tomorrow on: > > 14050 kHz at 2200z Sunday (2 PM PST Sunday) > 7047 kHz at z Monday (4 PM PST Sunday) > > 73, > > Kevin. KD5ONS > > - > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Tx distortion
Just a dumb question. Have you checked the DC to the K2 either battery or power suply. Ralph S. Turk, W7HSG 520-444-6610 > On February 2, 2019 at 1:28 PM mustang65 wrote: > > > Thanks for answers. > The symetrix output impedance is 200 ohm and it is recommended to not load > it > lower then 600 ohms. > I lifted the plus side of c20 and connected a 10k resistor to ground. > I connected the signal from the symetrix output to the plus side of c20. > This way the signal comes direct to ne602 and u3 is not involved. > > The distortion is still the same and no difference what signallevel > I put out from the symetrix. from a very low level until a 3 bars of > alc reading. I am still listening to the Lf signal from the symetrix just to > be shure > it is no clipping from the unit. > > I know this is not the way to drive the k2 just trying to find a way to see > if U3 is the problem. > > The microphone I drive the symetrix is a shure sm58 and I also > use a icom hm12 that i put direct in to the K2. > The first 6 years I used the Icom microphone then the last 8 > years I used the symetrix and Shure sm58 that improved the audio. > > 73 Mike sm3xgm > > > > > > -- > Sent from: http://elecraft.365791.n2.nabble.com/ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w7...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
