Re: [Elecraft] Band pass filters

When you buy RA6LBS filters each comes with a tracing by a spectrum analyzer showing the exact filter characteristics. On each of these that I own the tracing matches the Rigol with tracking generator. They really work well. I have a complete set of 500 watt filters from RA6LBS. They are sold by

Re: [Elecraft] Tecsun portables

On 7/27/2021 2:17 PM, Louandzip wrote: Spectrum display would be very useful. Yes, spectrum display is QUITE useful. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] Band pass filters

On 7/27/2021 12:53 PM, Morgan Bailey wrote: 80 to 100 dB band to band attenuation is necessary for a contest station. That depends a LOT on the radios and the amps. Reviewing Contest University the RA6LBS talk from a few years ago is the basis for this decision. He probably has the most

[Elecraft] audio input level setting for FM packet

I've recently started using my K3 with internal 2m transverter for accessing the local emergency communications packet BBS system. I know for sideband digital modes, the recommendation is for 4 bars with the 5th flickering. Does this also apply to FM? I want to make sure I achieve nearly full

Re: [Elecraft] Band pass filters

David I purchased blank PCBs from VA6AM along with the torroids with a view to building a switched filter set. Still on my list of “want to do” and my motivation was driven by space reduction in my portable SO2R project. However I’ve somewhat learnt the hard way to be honest with myself

Re: [Elecraft] Band pass filters

Thanks all for the great advice and the further reading. In my specific case of K3S + KPA500 + KAT500, is there no room to reduce the high performance W3NQM filters? I understand common mode filters and have made good versions of these from K9YC cookbook. They remain in circuit all the time,

Re: [Elecraft] Band pass filters

Bird makes a very good bandpass filter for the SDR radio you are speaking of... It gets rid of ALL phase noise on all bands at once. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On

Re: [Elecraft] Band pass filters

80 to 100 dB band to band attenuation is necessary for a contest station. Reviewing Contest University the RA6LBS talk from a few years ago is the basis for this decision. He probably has the most experience in this field beside that of VA6AM. Both make great filters. Just having a filter is not

Re: [Elecraft] Band pass filters

well said at field day  that famous SDR, very reasonably priced, abundant with features DID INDEED SPREAD wide band noise ..it was on 10 and wiped out all thru 80 meters on three other radios  of various makes. ( mine was a k3) ... maybe all we needed was to have bandpass filters for

Re: [Elecraft] Band pass filters

You need a filter on the TX radio to prevent its phase noise from being heard on other bands.  Just pressing PTT on the TX radio, even without putting out any measurable power, will raise the noise floor on multiple bands. With suitable band decoders driving filter selection, fast-switching

Re: [Elecraft] Tecsun portables

On 7/27/2021 8:17 AM, Mike Harris via Elecraft wrote: Tecsun seem to be popular. Any suggestions which model? The PL660 has the the AM aircraft band, which can be an advantage in direction finding. They are fine radios. 73, Jim K9YC

Re: [Elecraft] Tecsun portables

I use a Tecsun PL-660 for RFI tracking.  It is very sensitive, and has two steps of attenuation.  It has a jack for an external antenna, which disables the built-in whip. Frequency coverage is good.  It has a BFO, which is helpful in listening to certain types of noise.  It has a headphone

[Elecraft] High SWR on KPA500

I have noticed that the SWR reading on one of my two KPA500s will show almost 1.8:1 while the KAT500 show 1:1. My other KPA500 does not exhibit this behavior. It would seem to me that if the KAT500 has tuned out the SWR and indicates a 1 to 1 match then the KPA-500 should also show a

[Elecraft] Band pass filters

David, One need not have a "feeling" about the necessity of band pass filters. In addition to the concerns that Paul cited about isolation between ports in a triplexer or internal antenna port isolation in a transceiver, there are analytical methods to determine susceptibility to receiver damage

Re: [Elecraft] Frequency shifts of KX3 when selecting CW?

Hello Paul, I think you mean 700 Hz (not kHz) for the frequency.  You can set the pitch of the CW note on your radio to fit your own ears. Older rigs just picked a freq and you had to live with it. My old Kenwood TS-820S used an 800 Hz CW offset as did my later Ten Tec OMNI V (a great cw

Re: [Elecraft] Band pass filters

Hi Paul Thanks for those thoughts. I see your point re sharing a tri-bander and that looks like a severe case. Looking at the number of filters already in place and the low spurii expected of Elecraft gear, it looks worth considering to down-grade the extra filters. For instance, the KPA

Re: [Elecraft] K3/K3S options and upgrades

Madelyn, Thank you for the update. Does this mean, for those of us who already ordered, we can expect our upgrade kita/components soon? Thanks and 73, Ian Kahn, NV4C On Tue, Jul 27, 2021, 12:35 PM Madelyn Gomez wrote: > Good morning. > > This is a notification that the K3/K3S options and

Re: [Elecraft] K3/K3S options and upgrades

What does this mean for the KRX3A, which is still listed as eventually-orderable on the order page? On Tue, Jul 27, 2021 at 9:35 AM Madelyn Gomez wrote: > Good morning. > > This is a notification that the K3/K3S options and upgrades page will be > CLOSED as of 5:00 pm PDT today, July 27th. > >

[Elecraft] K3/K3S options and upgrades

Good morning. This is a notification that the K3/K3S options and upgrades page will be CLOSED as of 5:00 pm PDT today, July 27th. If you have been thinking about ordering any of these items, please do so before 5:00 pm today. Madelyn Gomez Elecraft Sales 125 Westridge Drive, Watsonville, CA.

Re: [Elecraft] Band pass filters

Hi David I think any answer is dependent on the station configuration. For example, if the M/2 station is sharing a single tribander (i.e. one on 20m and another on 15m) then I imagine filters are still essential as a tri-plexer will only provide so much isolation. Another example; If a

[Elecraft] New Nabble link, trying again, http://elecraft.85.s1.nabble.com/

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[Elecraft] Band pass filters

Given the improved performance of modern transceivers, is there still a call for high specification W3NQN band pass filters in a 2-transmitter station? For example on a Multi-2 contest environment. For instance K3S + KPA + KAT. The filter fitted between radio and amplifier. I have the

Re: [Elecraft] NABBLE New Link!

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[Elecraft] Tecsun portables

Hi, Looking to replace my dead SW portable often used for RFI tracking. Tecsun seem to be popular. Any suggestions which model? Regards, Mike VP8NO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] Drift on 6 meters

Dunno why but is the P3 figure that is drifting, not the radio. Stay there and you will see the figure going left and at last stabilize, but the signal (audio and frequency) and the radio will remain exactly there. Happen only one time with a switch on from cold, after will never happen. A

Re: [Elecraft] Drift on 6 meters

Yeah, you guys are right - it's the K3 with updated synthesizers 73, Pete N4ZR Check out the new Reverse Beacon Network web server at . For spots, please use your favorite "retail" DX cluster. On 7/27/2021 10:41 AM, Gordon LaPoint wrote: Most radios drift when

Re: [Elecraft] Drift on 6 meters

Most radios drift when first turned on, and stabilize after a warmup time. What radio? Gordon - N1MGO On 7/27/2021 10:20 AM, Pete Smith N4ZR wrote: I've just started experimenting with WSJT-X on 6M, and notice that on the waterfall signals seem to drift slightly over the first 3-4 minutes. 

[Elecraft] Drift on 6 meters

I've just started experimenting with WSJT-X on 6M, and notice that on the waterfall signals seem to drift slightly over the first 3-4 minutes.  It's a matter of just a few Hz, and seems to stop after that - I'm just wondering if this is normal or reason for any concern. -- 73, Pete N4ZR Check

Re: [Elecraft] Frequency shifts of KX3 when selecting CW?

I have this behaviour on my Yaesu Ft-897. If I set the CW modulation to 700 kHz, then it will move to 1.700 MHz. I thought this was "normal" behaviour, and I was afraid to ask about it (relatively new ham). I haven't tried to do the same on my KX3, but I will get it out and try it. I don't