[Elecraft] K3 problems during Field Day

/K3_TX_Birdies.bmp - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-problems-during-Field-Day-tp7558117.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http

[Elecraft] K3 problems during Field Day

a drifting birdy on 6 meters but this doesn't drift. Attached is a screen shot of my Spectrum Analyzer - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-problems-during-Field-Day-tp7558120.html Sent from the Elecraft mailing list

Re: [Elecraft] K3 problems during Field Day (My Mistake)

. The 2nd harmonic is at 14.13 but the birdie frequency is 14.060MHz. http://elecraft.365791.n2.nabble.com/file/n7558121/K3_TX_Birdies.bmp - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-problems-during-Field-Day

Re: [Elecraft] K3 problems during Field Day

in the noise floor as I tuned towards the 2nd harmonic, starting at 14.120, but below that, the band was clean as a whistle. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-problems-during-Field-Day-tp7558120p7558144.html Sent

[Elecraft] Auto Notch Filter Freeze

to a certain degree without the usual artifacts in the noise floor. I thought that this would be an interesting feature to add to the K3 in the next firmware upgrade. Jack WA9FVP Willco Electronics. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2

[Elecraft] Auto Notch Filter Freeze

frequency elements of speech and other times on the low frequency components but it reduced noise to a certain degree without the usual artifacts in the noise floor. I thought that this would be an interesting feature to add to the K3 in the next firmware upgrade. Jack WA9FVP Willco Electronics

Re: [Elecraft] [K3]Noise Filter (NF) ADJ

means mix will appear after F5-X and above. X defines the delay. Delay is the amount of time it takes for the filter to converge on a non-sinusoidal signal or the noise. The higher the number, the longer it takes for the noise to reduce to a low level. I hope this helps. Jack WA9FVP

[Elecraft] K3 IF out level

jack. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-IF-out-level-tp7579681.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home

[Elecraft] No line out when AGC is off

during fading, the RTTY signal reappears on the X/Y scope. I’m using Firmware Rev. 4.36, and DSP 2.73 - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/No-line-out-when-AGC-is-off-tp6566530p6566530.html Sent from the Elecraft mailing

Re: [Elecraft] No line out when AGC is off

It didn't help - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/No-line-out-when-AGC-is-off-tp6566530p6566932.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] No line out when AGC is off

WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/No-line-out-when-AGC-is-off-tp6566530p6568002.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http

Re: [Elecraft] No line out when AGC is off !SOLVED!

. I now have it at 5. - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/No-line-out-when-AGC-is-off-tp6566530p6568040.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] No line out when AGC is off !SOLVED!

It's been about 3 months since I made the adjustment. If I remember, I was feeding the line out to the computer sound card and the level wasn't very high. I was trying out the MT63 software. I'll probably invest in a Rig Blaster. - Jack WA9FVP Willco Electronics -- View this message

Re: [Elecraft] No line out when AGC is off !SOLVED!

well with soundcards. Since I moved into my new QTH I never hooked it up to my station. I’ll probably use it instead. - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/No-line-out-when-AGC-is-off-tp6566530p6569207.html Sent from

Re: [Elecraft] K-3 Roofing filter comment

calculations. You can have a situation where the DSP filter is narrower then the roofing filter but if the DSP engineer does his job, the unwanted signal will be outside the DSP filter bandwidth. The third order products will be at a minimum and the AGC will not be affected. - Jack WA9FVP Willco

Re: [Elecraft] K-3 Roofing filter comment

. I was involved in a DSP project in the late 80’s and early 90’s called “The Hamblaster a DSP for Ham Radio”, where I wrote two articles in QEX. - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/K-3-Roofing-filter-comment-tp6576237p6588698

Re: [Elecraft] need some roofing filter advice?

ordered my K3 I kept the stock 2.7/5 pole filter. I ordered the 250, 500, 6KHz and 13KHz (FM) filters. - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/need-some-roofing-filter-advice-tp6581353p6600962.html Sent from the Elecraft mailing

Re: [Elecraft] need some roofing filter advice?

a Stereo hifi store in the 70’s or maybe it’s because of my selective hearing loss - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/need-some-roofing-filter-advice-tp6581353p6609332.html Sent from the Elecraft mailing list archive at Nabble.com

[Elecraft] RTTY Filters

/DSC01917.jpg - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/RTTY-Filters-tp6755974p6755974.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list

[Elecraft] RTTY FILter

is distorted with non coherent phase shifts and in the noisy conditions the copy degrades. http://elecraft.365791.n2.nabble.com/file/n6756724/DSC01915.jpg http://elecraft.365791.n2.nabble.com/file/n6756724/DSC01917.jpg - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft

Re: [Elecraft] RTTY FILter

setup except the K3 is in FSK/DATA mode. http://elecraft.365791.n2.nabble.com/file/n6756770/rtty_usb_mode.bmp http://elecraft.365791.n2.nabble.com/file/n6756770/rtty_data_mode1.bmp - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/RTTY

Re: [Elecraft] RTTY FILter

setup except the K3 is in FSK/DATA mode. http://elecraft.365791.n2.nabble.com/file/n6756776/rtty_usb_mode.bmp http://elecraft.365791.n2.nabble.com/file/n6756776/rtty_data_mode1.bmp - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/RTTY

Re: [Elecraft] RTTY FILter

. Less than 450, the non-coherent phase shifts are introduced, as you mentioned is caused by filter ringing. - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/RTTY-FILter-tp6756724p6756903.html Sent from the Elecraft mailing list archive

Re: [Elecraft] RTTY Filter

://elecraft.365791.n2.nabble.com/file/n6757028/rtty_afsk.bmp http://elecraft.365791.n2.nabble.com/file/n6757028/rtty_fsk.bmp - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/RTTY-FILter-tp6756724p6757028.html Sent from the Elecraft mailing

Re: [Elecraft] RTTY FILter

in the roofing filters can effect the butterfly if it's too narrow. FL3 (2.7/5) is selected but as I dial down the width control, the DSP narrows the 15KHz IF. The DSP filter isn't a problem when AFSK is selected. It's the dual filter that's the problem. - Jack WA9FVP Willco Electronics -- View

[Elecraft] K3 Noise Blanker

- Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Noise-Blanker-tp6774838p6774838.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http

[Elecraft] Cross Band Repeat

With the 2 meter option installed and 70cm transverter connected, Is it possible to configure the K3 for cross band repeat? - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/Cross-Band-Repeat-tp6846095p6846095.html Sent from the Elecraft

[Elecraft] K3 noise blanker test

was completely eliminated while other settings yield an almost inaudible click in the speaker. http://elecraft.365791.n2.nabble.com/file/n6846246/K3_NB_Test.jpg - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-noise-blanker-test

[Elecraft] Noise blanker test.

and WID4 to WID7 are the best settings. http://elecraft.365791.n2.nabble.com/file/n6848682/k3_blkr.bmp - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/Noise-blanker-test-tp6848682p6848682.html Sent from the Elecraft mailing list archive

[Elecraft] K3 Noise Blanker Test

. usless! WID3 is spotty and WID4 to WID7 are the best settings. The oscilloscope image below show the pulse on channel 1 and the K3's Line Out on channel 3. The DSP and the I.F. noise blanker is turned off. http://elecraft.365791.n2.nabble.com/file/n6848725/k3_blkr.bmp - Jack WA9FVP

[Elecraft] K3 Noise Blanker Test

blanker is turned off. http://elecraft.365791.n2.nabble.com/file/n6848802/k3_blkr.bmp - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Noise-Blanker-Test-tp6848802p6848802.html Sent from the Elecraft mailing list archive

Re: [Elecraft] K3 Noise Blanker Test

as the car moved away. The question is, what is the pulse width and amplitude of an automobile. Does the pulse width change from car to car and electric motor to electric motor? How do you accurately simulate that condition? - Jack WA9FVP Willco Electronics -- View this message in context

Re: [Elecraft] K3 Noise Blanker Test

to the antenna as he drives by, I can get a better idea of the pulse shape and amplitude. Jack WA9FVP Willco Electronics - Jack WA9FVP Willco Electronics -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Noise-Blanker-Test-tp6848802p6850797.html Sent from

[Elecraft] More about the K3 NB and my apology.

.365791.n2.nabble.com/file/n6853246/k3noise2.bmp - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/More-about-the-K3-NB-and-my-apology-tp6853246p6853246.html Sent from the Elecraft mailing list archive at Nabble.com

[Elecraft] Almost Perfect RTTY copy

SHARPLY ON WEDNESDAY, AFTER FALLING SIGNIFICANTLY EARLIER IN THE WEEK.SOURCE: VOICE OF AMERICA - PREPARED BY ITTY EDITORIAL SERVICE - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/Almost-Perfect-RTTY-copy-tp6864776p6864776.html Sent from

Re: [Elecraft] K3 H Mode Mixer

What's the difference between an H mode mixer and a ring mixer? - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6894678.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] K3 H Mode Mixer

, it reminded me of the Burhan's VLF converter. The difference is the transformers that Burhans used. They were audio transformers that covered the VLF range. - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6896967.html Sent from

Re: [Elecraft] K3 H Mode Mixer

Here's the schematic. I purchased it in 1983. I was wrong he used a 74HC4066 http://elecraft.365791.n2.nabble.com/file/n6898162/scan0014.jpg - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6898162.html Sent from the Elecraft

Re: [Elecraft] K3 H Mode Mixer

Here's the circuir description. Again, I was wrong, he called it a balanced mixer, not a ring mixer. http://elecraft.365791.n2.nabble.com/file/n6898183/scan0013.jpg - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6898183.html

Re: [Elecraft] K3 H Mode Mixer

. You can download the software at, http://f6cte.free.fr/index_anglais.htm - Jack WA9FVP -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6899060.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] PR6-10 Receiver Pre Amplifier

The pre-amp bridges the antenna output to the RX in. You can use antenna 1 or antenna 2 for your 6 meter beam but in receive, you should select the RX antenna. Jack WA9FVP Willco Electronics - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791

[Elecraft] Auto Notch Revisited.

the problem! Jack WA9FVP Willco Electronics rep...@willcoele.com - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/Auto-Notch-Revisited-tp7591810.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] Auto Notch Revisited.

and lock the null frequency and depth. A manual adjustable notch was too cumbersome and would required fiddling with the frequency adjustment knob while trying to null the carrier. I would love to see this feature added to the K3. Jack WA9FVP Willco Electronics rep...@willcoele.com

Re: [Elecraft] Auto Notch Revisited

Instruments web site. The Fast Block LMS is the one we used in the Hamblaster. http://zone.ni.com/reference/en-XX/help/372357A-01/lvaftconcepts/aft_lms_algorithms/ - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/Auto-Notch

[Elecraft] K3 and VB6

WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-and-VB6-tp7593796.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net

Re: [Elecraft] KPA500 fault at H44KW (no pwr high SWR)

switch schematic) on the Filter board. Q5, an IPA50R399P is a 550v MOS Power Transistor. My question is; Q4 a similar device (an IRFSL9N60A) with almost identical specifications except it's a 600V, MOS transistor. Can I use it as a replacement for an IPA50R399P? Jack WA9FVP Willco Electronics

Re: [Elecraft] KPA500 fault at H44KW (no pwr high SWR)

Hi fred, The parameter is Rds(on),max The IRFSL9N60A is .75 ohms at 9.2 amps and the IPA50R399CP is .399 ohms at 9 amps. Q4 and Q5 are in series with a 100 ohm resistor and the diode so the difference in the R DS(on),max has little effect. Jack WA9FVP Willco Electronics - Jack WA9FVP

Re: [Elecraft] KPA500 fault at H44KW (no pwr high SWR)

I just found out that there's a Rework Kit E850607 for the KPA500. It replaces Q5 (a FET) with a Darlington Transistor. The kit also includes a Zener Diode, resistors and capacitors and includes changes to the 12 meter LP filter. The kit applies to board REV D9 or earlier. - Jack WA9FVP

Re: [Elecraft] [K3] autotuner for K3 with AL-811 amp (KAT500 or other) / random wire antenna

I just built my kpa500 and installed it today. I use a hamemade true balanced tuner and feed it with 450 ohm latter line all the way to the shack. So far on 40 meters I had no problems. The kpa500 is next to my K3. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context

Re: [Elecraft] KPA500

If your not using the KPAK3AUX cable kit, are you sure the key line is connected? Jack WA9FVP - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA500-tp7594350p7594501.html Sent from the Elecraft mailing list archive

[Elecraft] K3EXREF problem

A knob but that doesn't happen. Checking the frequency with WWV by using another radio in AM mode and comparing it to the K3, I can hear a beat note. Jack WA9FVP Willco Electronics - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com

[Elecraft] K3 DSP and the Hamblaster

it from converging on sinusoidal elements in the human speech. It would be nice it there was a way to freeze the K3's auto notch. http://elecraft.365791.n2.nabble.com/file/n7596483/HB_Control.bmp - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft

Re: [Elecraft] K3 VFO Tuning Noise

signal from the PLL circuit can be used to mute the audio during the tuning steps but muting process can also create noise. The K3's receiver noise floor is so low on 6 meters that the tuning transients are well pronounced. Jack WA9FVP Willco Electronics. - Jack WA9FVP Sent from my TRS-80

[Elecraft] K3, noise during SSB TX

with the speaker's audio D-A converter. For some reason the mix is causing a high level of digital noise that's fed to a third D-A (the output that feeds the TX/IF). Any thoughts from a DSP guru? Jack WA9FVP Willco Electronics. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message

[Elecraft] K3 High Level Digital noise

help. It happens on all bands and while transmitting into Bird 200 watt attenuating load. With an additional 20db of attenuation, and a total of 50 db, I checked the TX output on my spectrum analyzer. The spectrum is clean at all TX levels. Jack WA9FVP Willco Electronics. - Jack WA9FVP

Re: [Elecraft] K3 High Level Digital noise

The only thing connected was the bird load and the DC power. I think the problem is in the A to D or D to A chip or are they integrated in the DSP chip? I assume that there's a mic amp in front of the A to D. It could cause noise problems. - Jack WA9FVP Sent from my TRS-80 :-) -- View

Re: [Elecraft] K3 High Level Digital noise

today I'll make an attempt to trouble shoot the problem. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-High-Level-Digital-noise-tp7603637p7603648.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] Audio mixers

.nabble.com/file/n7604611/Radio_Interface.jpg - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/Audio-mixers-tp7604562p7604611.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] Blown finals

Check the bias voltage. If it's too high, it can blow the finals. Sometimes the circuit that provides the bias can have a shorted transistor and drive too much current into the base of the final transistors. Jack WA9FVF Willco Electronics - Jack WA9FVP Sent from my TRS-80 :-) -- View

Re: [Elecraft] K3 KX3 Memory Editing Utility (revisited yet again)

I manage memories for all my radios including an Icom R8500 that has 1000 memories. There are programs that can save and edit the memories to a PC file but I keep a frequency list in an Excel spread sheet. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http

Re: [Elecraft] 2015 Hamfesters Hamfest (South Chicago)

I would like to do that but I don't have the latest K3s. I only have the K3, KPA500 and the KAT500. The complete K Line would include the P3. Instead, I use an SDR for the panoramic display. If Elecraft can supply me with handouts, I would consider it. Jack WA9FVP In New Lenox, Il

[Elecraft] K3/KPA500 VSWR on 6m

short twisted wire as a transmission line on the HF bands is probably OK but On 6 meters, the inductance in twisted wire, I'm sure, will exhibit loss. I replace it the wire with a 4" length of RG58U. Now all 3 SWR readings agree and the VSWR is 1.1:1. Jack WA9FVP - Jack WA9FVP Sent f

Re: [Elecraft] K3/KPA500 VSWR on 6m

. I twisted the wire tighter and it went back to the original measurement. When I worked at Argonne National labs, in the Avanced Photon Source RF group, we were working with 350 MHz, 1 megawatt klystrons. We learned all about ground loops the hard way. jack WA9FVP - Jack WA9FVP Sent

[Elecraft] K3 Codecs and Remote Desktop

ot;What is the difference between the Spectra-Vue codec and the K3 codac? Why is the audio available on the SDR-14 but not on the K3. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Codecs-and-Remote-Desktop-tp7616124.html Sent

[Elecraft] Dayton

Anything new @ Dayton? - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/Dayton-tp7617618.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft

[Elecraft] Amplitude Modulation on FM.

When operating 6 meter FM I'm seeing amplitude modulation on my K3. I have the all the upgrades including the KIO3B and the KSYN3A. Into a 50 ohm load at 200 watts the KPA500 peaks at 300 watts. I disconnected the IO cables including USB but nothing changed. - Jack WA9FVP Sent from my

Re: [Elecraft] Amplitude Modulation on FM.

I think I know the problem. My widest filter is 6KHz, I'll have replace it with the 13KHz filter. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/Amplitude-Modulation-on-FM-tp7617137p7617143.html Sent from the Elecraft mailing

[Elecraft] K3S USB sound issues.

normally run Norton Internet security and do scans periodically but I never had a virus. My son came over and he ran Malware-bytes and several other virus detection programs but nothing was found. - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http

Re: [Elecraft] K3S ELF 10KHz

In the 80's using my Icom R71 receiver and a Burhans VLF converter, I copied the Omega Navigation system operating in the 10 to 12 KHz range. https://en.m.wikipedia.org/wiki/Omega_(navigation_system) - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http

Re: [Elecraft] K3S USB sound issues.

the Microphone level. Several minutes later the bogus audio devices reappear. As I was writing this thread, I now have six instances running in the Volume Mixer. <http://elecraft.365791.n2.nabble.com/file/n7628484/Volume_Mixer.jpg> - Jack WA9FVP Sent from my home-brew I5 Core PC -

[Elecraft] Sub Receiver Questions

audio via the USB CODAC? - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Sub-Receiver-Questions-tp7628573.html Sent from the Elecraft mailing list archive at Nabble.com

[Elecraft] K3S ELF 10KHz

Is it possible, maybe in the next firmware rev, to extend the bottom end of the K3S down to 10KHz? - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-and-VLF-tp7628247p7628423.html Sent from the Elecraft mailing list

[Elecraft] K3S and VLF

o the receiver-in port. <http://elecraft.365791.n2.nabble.com/file/n7628247/PSK.jpg> - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-and-VLF-tp7628247.html Sent from the Elecraf

[Elecraft] WSPR2.0 at 277.2KHz

-0.9 0.4742 0 WI2XSV EN61 23 0428 -2 -1.1 0.4742 0 WG2XXM EM15 37 0428 -25 -0.9 0.4742 0 WI2XSV EN61 23 0430 -13 -1.0 0.4742 0 WH2XXP DM33 47 0430 -17 -0.9 0.4742 0 WH2XZO EM85 30 - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2

Re: [Elecraft] WSPR2.0 at 277.2KHz

. In spite of that, when I turned off NR/NB, WSPR dB levels were about the same. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/WSPR2-0-at-277-2KHz-tp7628363p7628377.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] WSPR2.0 at 277.2KHz

I forgot to mention that I was using USB mode and the audio was being fed to my PC via the USB port. The WSPR software was connected to the K3S CODEC. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/WSPR2-0-at-277-2KHz

Re: [Elecraft] WSPR2.0 at 277.2KHz

Yes, it's not but I was explaining software that can copy data outside the ham Bands. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/WSPR2-0-at-277-2KHz-tp7628363p7628406.html Sent from the Elecraft mailing list archive

Re: [Elecraft] WSPR2.0 at 474.2KHz

2 -29 -1.5 0.475617 0 WI2XSV EN61 23 (NR Off) 0346 -31 -1.7 0.475617 0 WI2XSV EN61 23 (NR On) 0350 -31 -1.4 0.475617 0 WI2XSV EN61 23 (NR On) Not much change. - Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/WSPR2-0-a

[Elecraft] Sub Receiver & KBPF3

's a clone of the main receiver with FM, AM, 2.8, 400 and 250Hz filters. I wonder how the sub-receiver would stack-up on Sherwood Engineering's test data. Jack WA9FVP Willco Electronics - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft

[Elecraft] Heathkit Tool.

aft.365791.n2.nabble.com/file/n7629328/DSC00410.jpg> - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Heathkit-Tool-tp7629328.html Sent from the Elecraft mailing list archi

[Elecraft] Sub Receiver I.F. Tap

to and duplicate the circuit on the main receiver? John Albert WA9FVP WillcoElectronics. - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Sub-Receiver-I-F-Tap-tp7629352.html Sent from the Elecraft mailing list archive

Re: [Elecraft] Sub Receiver I.F. Tap

load and mistune the I.F.. That's why the main receiver was designed with a buffer JFET. - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Sub-Receiver-I-F-Tap-tp7629352p7629368.html Sent from the Elecraft mailing list

[Elecraft] Sub Receiver Antenna Switch

toggle switch with copper tape. In the attached photo, so that I can get a clear shot of the toggle switch, I disconnected the TMP from the ATU. <http://elecraft.365791.n2.nabble.com/file/n7629967/DSC00416_%282%29.jpg> - Jack WA9FVP Sent from my home-brew I5 Core PC -

Re: [Elecraft] K3S Noise reduction Test

The K3/K3S Noise Reduction is disabled for FM and Data modes. -- Jack WA9FVP- http://www.willcoele.com/radio_repair <http://www.willcoele.com/radio_repair> The Radio Reclamation Center (815) 463-9365 From: Jim Brown-10 [via Elecraft] [mailto:ml+s365791n7631918...@n2.nabble.com]

Re: [Elecraft] K3S Noise reduction Test

me, that like to tinker, the delays can be on a separate knob or in the configure menus. For normal operation or during a contest, I find it too cumbersome to dial through all of the settings to find the best one. -- Jack WA9FVP- http://www.willcoele.com/radio_repair <h

Re: [Elecraft] K3S Noise reduction Test

difficult part is to find the correct parameters that can satisfy both conditions. -- Jack WA9FVP- http://www.willcoele.com/radio_repair <http://www.willcoele.com/radio_repair> The Radio Reclamation Center (815) 463-9365 From: Grant Youngman-2 [via Elecraft] [mailto:ml+s365791n7631926

Re: [Elecraft] K3S Noise reduction Test

about 50, yield no change in the aural bandwidth. The NR reduction level had the greatest impact. I used the DSP Noise Blanker setting on several occasions and found it more affective on low level electrical noise. The NR setting or the conventional NB wasn't as affective. -- Jack WA9FVP- http

Re: [Elecraft] K3S Noise reduction Test

ion cannot pull an SSB signal out of the noise. It can however reduce the noise floor to a comfortable listing level'. I guess, that's all we can hope for. PS; In order to reduce bandwidth, I try to cut previous posting from my replies. Sometimes I forget and for that I apologies. -- Jack WA9FVP

[Elecraft] K3S Noise reduction Test

ttings and some can be eliminated. What are your thoughts? - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-Noise-reduction-Test-tp7631913.html Sent from the Elecraft mailing list archive at Nabb

Re: [Elecraft] K3S Noise reduction Test

except I used a pseudorandom noise generator and an audio oscillator. On January and October of 1992, I wrote articles in QEX magazine “A Birth of a New DSP Board” and “Developing Software for DSP”. -- Jack WA9FVP- http://www.willcoele.com/radio_repair <http://www.willcoele.com/radio_rep

Re: [Elecraft] K3S Noise reduction Test

nr4c. bill wrote, But that knob varies a whole other range of NR. How hard is it to turn one knob 32 clicks? 32 clicks but only 4 NR levels. The other settings are delays and mixed signals. There aren’t enough level settings. -- Jack WA9FVP- http://www.willcoele.com/radio_repair <h

Re: [Elecraft] K3S Noise reduction Test

for 30 years and in and in the DSP groups for 15 years, the single tone test is the only way I know to characterize the LMS algorithm. If you have a better test setup, please let me know. -- Jack WA9FVP- http://www.willcoele.com/radio_repair <http://www.willcoele.com/radio_repair> The

[Elecraft] 2nd receiver, RX Input Protection

DB of gain, there's no need to use the K3S preamp. I have no way to measure the noise figure but compared the K3S pre-amp, I can hear signals just as good. The tube is a 6BQ7. <http://elecraft.365791.n2.nabble.com/file/t344213/DSC00612.jpg> - Jack WA9FVP Sent from my home-brew I

[Elecraft] KPA500 Relay Failure

remove the cover on the old relay and using a 12v power supply, I set up bench test. With the relay energized, I connected a Fluke meter in diode mode and it proved that the antenna connection in operate mode was intermittent. - Jack WA9FVP Sent from my home-brew I5 Core PC -- Sent from: http