Re: [Elecraft] K3 Resistor Values

Chris The value is stated on the schematic for the K3S RF board, downloadable from the Elecraft website at https://ftp.elecraft.com/K3S/Manuals%20Downloads/E740323%20K3s%20Schematic%20Files.pdf A quick PDF search on R81 will take you to 3 different parts labeled R81 in the schematic. Pick

Re: [Elecraft] K3 Power-hunting on FT8

, Technical Resources On 7/23/23 07:23, M Cresap via Elecraft wrote: > For my K4, the FT8 signal is clean with no more than 2 bars of ALC. > To be clear, the spurious responses I have seen with ALC set to 5 bars has NO > measurable IMD responses. There is only the one strong signal present, the &

Re: [Elecraft] K3 Power-hunting on FT8

I have been running tests on K3s and K4s to understand the conditions needed to transmit clean FT8 signals. I have previously shared some of my findings with Pete N4ZR and a couple of other folks. Their feedback has been very valuable. Joe Taylor, K1JT has shown the spectral purity of the FT4

Re: [Elecraft] KPA1500 replacement devices

have since gone to water-cooling and don’t have to deal with the heat problems anymore. (See Attached)   73, Hal W7YNC   From: M Cresap [mailto:m.cre...@yahoo.com] Sent: Tuesday, November 01, 2022 3:21 PM To: Dynolab; Elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 replacement

Re: [Elecraft] KPA1500 replacement devices

or ART2K0 devices may be less reliable than the devices currently being used in the KPA1500. 73, Hal W7YNC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of M Cresap via Elecraft Sent: Tuesday, November 01, 2022 10:21 AM

[Elecraft] KPA1500 replacement devices

Anyone have an educated guess whether the ART1K6xx or ART2K0xx devices would be a drop in replacement for the currently used device in the KPA1500? Most of the interesting specs are within 10% of the current device, the open loop gain may be a dB or two higher (if the data sheets are really

Re: [Elecraft] HI CUR on 40

Dave So where is the optimum place to place the ferrites for this antenna if you have a problem like Alan described? Does the near field extend roughly to half the stacking distance of that antenna (i.e. 6 feet or so), making that the best place for the ferrites? Does a mostly vertical coax

Re: [Elecraft] XV222 RX is Dead, Need Advice

Mark You can check the performance of your XV222 receiver amplifiers with only a common voltmeter. Take off the top cover of the transverter, check the voltage between TP2 and ground (should be between 200 to 275 millivolts). That measures part of the source voltage of Q3, the first receiver

Re: [Elecraft] K4 TERM mode

Or will a K3/0 be able to control a K4? 73, Mike, W3IP On Friday, June 26, 2020, 7:53:37 PM EDT, Fred Jensen wrote: Hope this isn't redundant ... anyone know if the K4 will control a K3 in the RRC 1258 K3 Twins mode? 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County

Re: [Elecraft] K4 Question

Once any FT8 passband is digitized, filtered, and decimated in a K4, there should be no need to ever apply AGC - just pass the bits over to WSJT. The decimated bit stream may exceed 16 bits, so the WSJT input processor would have to be modified to accept the additional dynamic range. On

Re: [Elecraft] Transverter XV144 way off frequency

Bob My observation is that the K3 reference oscillator is much more stable (moves just a few Hz max) than any of the XV transverters even if equipped with ovens. I would instead use the LeoBodnar Mini to replace the local oscillator in the XV144. The process is identical for the XV222. Comments

[Elecraft] K3 - Transverter IF frequencies outside the ham bands

I am contemplating building a 2 meter transverter based on a very low noise commercial100 MHz crystal oscillator that would result in a IF frequency of 44 MHz. Can the KXV3 et al be coerced into emitting 0 dBm outside the ham bands and the front panel display the transverter tuned RF frequency?

[Elecraft] K3/K3S with KXV3B Feature request

Wayne/Eric I'd like to use a lower net gain (on receive) transverter with a K3/K3S.The transverter IF frequency is 28 MHz. Would it be possible to selectively enable Preamp 2 of the KXV3B during transverteroperation? Moving the transverter receive line to "Rx ant. in" andselecting Preamp 2

Re: [Elecraft] New Elecraft Product: K-Pod Control Panel for K3S and K3 Transceivers

Hi Wayne Will the K-pod work with the K3-0? 73, Mike, W3IP From: Wayne Burdick To: Elecraft Reflector Cc: "elecraft...@yahoogroups.com" ; "elecr...@yahoogroups.com" Sent: Wednesday,

Re: [Elecraft] Suggestions on Antenna Analyzers

The SARK-110 looks like a nice unit. Interesting that the SARK-110 is not available in the US due to potential patent problems. There is a US patent (7,629,795) filed in 2007 that looks a lot like the SARK-110 and other VNAs that were already published (N2PK's version since 2004 on the

Re: [Elecraft] XV144 Operation

Dave   I have several birdies on both 6 (K3) and 2 meters (K3+XV144) - most can be traced to the computer or router/Ethernet radiation. Shielded Ethernet cables helped me a lot.   73, Mike, W3IP From: Wayne Burdick n...@elecraft.com To: Dave Anderson, K4SV

Re: [Elecraft] K3 mods by I7SWX

Are there any test results available for the other mods suggested in Gian's paper? Thanks 73, Mike, W3IP Sent from my iPhone On Mar 1, 2013, at 1:22 PM, Giancarlo Moda i7...@yahoo.com wrote: Hi Wes, thanks for your note. Yes, it is the second mixer that needs improvement. I have the

Re: [Elecraft] K3 - K3/0 Installation

To: M Cresap m.cre...@yahoo.com Cc: elecraft@mailman.qth.net Date: Sunday, March 10, 2013, 5:52 PM Does traffic OUT of the K3/0 dominate that 900 KB/s stream? Have you measured the in/out components on either end? Thanks, /Rick On Sat, Mar 9, 2013 at 8:51 PM, M Cresap m.cre...@yahoo.com

Re: [Elecraft] K3 - K3/0 Installation

    My experience is that the K3/0 makes the remote station completely transparent. It is just like being in front of the rig. I have the K3 plus a SoftRock/soundcard on the IF output using the SpectrumLab client server application to provide a realtime waterfall display. The complete system 

Re: [Elecraft] XV432 - No intermediate pwr output

I had a similar problem with my XV432. I was able to chase the problem to the tx driver stage. The fix was to add ground vias from the top to the bottom of the board in a few judicious places. I passed this info back to Gary at Elecraft. I know of at least one other XV432 that has been

[Elecraft] Another KPA500 remote question

How much chatter between a remote control program and the KPA500 can be tolerated by the KPA500 microprocessor? As others have noted, and I have seen as well, the power readings reported on the RS-232 line are instantaneous snapshots. In a true remote situation, you need many readings a second

Re: [Elecraft] KPA500 Assy Man Rev B, and Programmer's Reference uploaded

If I hook up the KPA500 RS-232 P line to the PC, and the KPA500 RS-232 X line to the K3, will commands from the PC to/from the K3 be successfully relayed through the KPA500? Any idea of latency? ( I haven't found a definitive statement one way or the other - it apprears that the command sets

Re: [Elecraft] XV432 Oscillates with Amp connected

I had a similar problem with my XV432. I was able to chase the problem to the tx driver stage. The fix was to add ground vias from the top to the bottom of the board in a few judicious places. I passed this info back to Gary at Elecraft. I know of at least one other XV432 that has been

Re: [Elecraft] Remote control of K3

I have been using the N4PY Pegasus Plus software package for some time now with great success with the K3, transverters, amplifiers, and rotor ( www.n4py.com). He has a client server architecture that lets you run the software without needing to expend the bandwidth required by a remote desktop

[Elecraft] Remote firmware upgrade failure

After several months of successful operation with MCU firmware 3.97, I attempted to remotely upgrade the firmware from 3.97 to 4.22 using the latest K3 utility (ver 1.3.11.5). It failed. The K3 utility had detected a 38400 baud rate, even though the radio had been set to 19200 baud. The