Re: [Elecraft] 472KHz/500KHz
There is another caveat to keep in mind when using the K3 in transverter mode. Sensitivity will be subject to the ham band BPFs, so a preamp may be needed if the "IF" freq. falls well outside the BPF passband unless a general coverage module (KBPF3) is installed. The KBPF3 works fine if the KXV3 is in TEST mode but the K3 is not setup with a transverter band, ie. you're parked on 10.500 MHz for 500 kHz conversion. However, when using a transverter band (ie. direct freq. readout using IF=10, RF=0), the KBPF3 is not switched in when it should be. I have brought this to the attention of support/development since it is clearly a bug and there should be no need for a preamp with the KBPF3 installed. In the meantime, I use IF=14 and RF=0 for a transverter band and get direct freq. readout. The 20M ham BPF is wide enough that there isn't a significant amount of attenuation at 14.500 MHz. Having both 3.5 MHz and 10 MHz would be good additions to the transverter IF selections. The former because there are numerous converter circuits published or were/are commercially available based on 3.5 MHz, the latter because it is a defacto reference freq. 73 - Eric NO3M (WD2XSH/46 - ARRL 600M Experimental Group) On 09/07/12 12:59, Edward R Cole wrote: > It would be even easier if one could use a 10MHz IF for LF. For this the K3 > and KX3 (when the code is written) xverter settings could be set to > XVRF=0MHz XVIF=10MHz. This way the accurate 10MHz reference, already applied > to the reference input to the K3 could be used as the local oscillator in > the external transverter > > Dave > > G4fre > > > Dave, > > This is exactly what I am planning. I already have a low-level mixer > that does this. My amplifier drives with 0.1 mw )-10 dBm) so > basically all I need is to provide for Rx. I have a +/-5E-12 OCXO on > 10-MHz with +10 dBm for LO injection. For the K3 running in TEST > mode it is a natural. KX3 may not allow operation outside ham bands? > > 73, Ed - KL7uW > > __ 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] K3/KX3 MF/LF Transverter
There are plenty of LF converters to homebrew from, most very simple including those using an SA602/612. Another is the AMRAD LF converter, QST April 2002. PCBs can be purchased from FAR circuits. I use three of those for dual RX and TX with a 14MHz local oscillator and a K3 in transverter mode, displaying the actual LF freq (Project: http://no3m.net/index.php?page=600m ). There are guys in the experimental group running antennas far smaller than most would consider. However, while a short, minimally top-loaded (relatively speaking), heavily base loaded antenna will be grossly inefficient, all it takes is more power to reach the ERP level, which will be low anyways. 73 - Eric NO3M On 07/08/12 18:48, Jim Lowman wrote: > Not to rain on anyone's parade, Bill, but a couple of things > come to mind: > > -- I would think it a risky business to develop a transceiver >for a band that is not yet authorized for amateur use > > -- If most of us have trouble getting an antenna going for > 160m - wow - 630m? > > Just thinking out loud; not wanting to discourage anyone. > > 73 de Jim - AD6CW > > On 7/8/2012 10:42 AM, Bill Harris wrote: >> Wayne: >> An Elecraft Transverter for below 510 kHz would be well received, world >> wide. I guess the number of participants would be rather low to start with >> but interest would increase with the availability of such an item. A poll >> of the amateur market would give a good indication of interest. If the >> numbers aren't there to warrant such venture, then maybe one of the small >> kit-providers might pick up the banner. >> Presently, I see two potential customers; KL7UW and myself. How's that for >> a start? ;) >> 73 >> de Bill-w7kxb >> . . >> __ 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] KPA500 and KAT500 Ports
Another very reasonable switch for the "kit" builder: http://home.comcast.net/~kk1l/kk1l_2x6switch/ I trunk three of those from an old Sixpack for up to 18 antennas (still have 4 unused slots!) and they've worked flawlessly. Total cost of PCB, parts, and LMB Heeger aluminum box was perhaps around $145. - eric NO3M On 07/12/11 11:01, WILLIS COOKE wrote: > You know that Ameritron, Array Solutions and some others have remote antenna > switches available at reasonable prices. Since these things take space, it is > nice that they can be remote mounted, even outside in some cases. It seems a > better solution to me than to add a kilobuck to the KPA500 price and make it > the > size of a small refrigerator when the requirements vary from person to person > and the chance of pleasing more than a small portion of the users is small. I > prefer the small box that is possible to take on a DXpedition or to Field Day > and just endure the horrible pain of changing the coax when you change bands. > The main thing that discourages me from buying an eight pack from Array is > that > I don't have enough antennas to keep it from being lonesome. > > Willis 'Cookie' Cooke > K5EWJ& Trustee N5BPS, USS Cavalla, USS Stewart > > > > > > From: Eric > To: elecraft@mailman.qth.net > Sent: Tue, July 12, 2011 4:57:10 AM > Subject: [Elecraft] KPA500 and KAT500 Ports > > Elecrafters, Hear My Plea: > > The K3 has two tx antenna ports available. It seems logical to me that the > KPA500 would have two (output) as well. But it doesn't. I would like to see > the > KAT500 have two antenna ports (unbalanced) to make up for this. Running the 6m > output to another coax makes sense--most (all?) band decoders and relay boxes > don't handle 6m, and the lack of a second output port on the KPA500 makes it > difficult to manage the 6m capability of the K3 cleanly. The KRC2 will handle > the band data, but does not have a compatible relay box, manual operation, or > lights to tell you what it is doing. > > > Right now my K3 sends HF to ANT1, that goes to an HF amp and to a TopTen band > decoder and relay box. Six meters goes to ANT2 and a separate 6m amp and 6m > antenna. > > > This gives me fully auto bandswitching on HF and 6m, save for 60m where the > TopTen decoder does not recognize as a valid address. > > > With my already ordered KPA500 > (selling both tube amps), I will have to manually switch 6m. I don't like this > not because I am lazy, but the older I get the more stoopid I get and its > just a > matter of time before I tx into a near-infinite SWR. Knowing me, I'll do it > repeatedly until something blows. Maybe multiple somethings. > > > I'll have to rely on the KPA500 and K3 saving themselves. Not good. > > In my squandered pre-K3 life, i put key lockout relays and a sequencer for 2m > EME in my system to make it failsafe and STILL blowed up the masthead preamp > more times than I can count. > > > In my opinion, the KAT500 needs two unbalanced outputs, bandmapped, for nice > tight integration with the K3, to keep things as elegant as possible. I have > no > opinion on balanced output(s). > > > No flames please. This is just my opinion--I could be wrong. > > 73 Eric WD6DBM > > K1, KX1, K2, K3, P3, XG3, all mini modules, Elecraft Kool-Aid I-V push STAT! > > KPA500 still a mere glimmer at Elecraft > > Sent from my&$@!? iPhone > __ > 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 __ 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] K2 w/ modules for sale
Selling K2 SN 6654. Case has some scratches/small nicks on side panels and bottom panel. Side panels have single holes drilled for #8 or #10 bolts used in mobile mount. Two separate top panels included with options that couldn't be installed at the same time; installed options: KDSP2 DSP Filter KSB2 SSB adapter KNB2 Noise Blanker K160M 160M and RX Ant Top #1 (HP) KPA100 100W PA + RS-232 Top #2 (LP) KAT2 Auto tuner KIO2 RS-232 / Aux I/O KBT2 Internal Battery Never had any mechanical or electrical issues since being built; original owner. Asking $1350 + shipping for everything (lists $1890 new). Please reply off-list if interested. 73 - Eric NO3M __ 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
