Hi Don, I can drop the level down and divide as you said. That would be easy enough. I wonder if the software of the K2 could be changed to allow any HF band to be used as an IF with that K60XV board? Who would I speak with about changing the software?
Otherwise I'll continue to look for a oven oscillator at those 4 baseband freq's. If I can't find one then I will have to use your method to generate some harmonics and pick the 7.0mc signal and buffer/filter it for the mixer. One way or the other it'll get done...hi hi... Thanks, Mike Don Wilhelm wrote: > Mike, > > It is a matter of firmware, not hardware limitations. > I would guess that when the K60XV was released, no one thought it > would ever be used for down-converting, so only the normal VHF IF > frequencies were made available. > > Since your current oscillator is super-stable, have you considered > using it as a standard. Use a digital counter to divide by 3 - that > will produce a square wave which is rich in odd order harmonics - a > tuned circuit could then pick off the 7th harmonic of the 1 kHz > frequency. I don't know if it would work easily for you, but I think > it would be viable enough to experiment with. > > 73, > Don W3FPR > > Mike-WE0H wrote: >> Hi Don, >> >> Wow that does present an issue now. I will see if I can find a >> suitable reference oscillator at one of those 4 freq's. Seems kind of >> odd IF freq's not having one at 10.0mc. Does anyone has a suggestion >> on what oscillator I could brew up that would stay on freq within 1 >> cycle for over 24 hours after warm up? That is the reason why I now >> run a oven oscillator because it never changes freq month after month >> and has zero drift. I run digital modes down there that won't >> tolerate even a 1 cycle drift. My oscillator's are a commercial >> assembly from old analog cell sites. Got a deal on them years ago and >> built my LF & MF station around them. >> >> Thanks much, >> Mike >> WE0H >> >> >> >> Don wrote: >> >>> Mike, >>> >>> The K60XV will not provide any advantage for you with that IF >>> frequency band. The available IF frequencies for the K2 transverter >>> bands are limited to 7 MHz, 14 MHz, 21 MHz and 28 MHz. These are >>> 'bottom of the band' frequencies and tuning will be upward from there. >>> >>> You can use the normal K2 BNC output (SO-239 if you have the KPA100 >>> installed) and translate the actual transverter input frequency in >>> your head. You may be doing that already with your Kenwood. >>> If you really need to use the K60XV output, you will need to modify >>> your transverter to use one of the available IF frequencies. >>> >>> You will also not be able to have the K2 directly readout the >>> frequency in that input band, but if you do change your transverter >>> to use the K60XV, you might want to 'fool' the K2 by entering 50 MHz >>> as the RF band and ignore the first digit on the display to obtain >>> the proper frequency. >>> >>> In other words, you could use the K60XV if you changed the >>> transverter oscillator to 7 MHz instead of your current 3 MHz and >>> reworked the IF bandpass for 7000 to 7510 kHz, the K2 would tune >>> from 7000 kHz to 7510 kHz to cover the input frequencies from DC to >>> 510 kHz. If you selected 50 MHz as the RF band, you would see >>> 50000.00 to 50550.00 on the K2 display. >>> >>> 73, >>> Don W3FPR >>> >> >> >>> Mike-WE0H wrote: >>> >>>> Building my K2 next week. I run 600 meters and use a homebrew >>>> transverter right now with my Kenwood HF rig. Going to build a new >>>> transverter for my K2 when it is finished. I ordered the >>>> transverter option. I need the K2 to function from 3.135mc to >>>> 3.510mc as I use a 3.0mc oven oscillator as my reference mixed with >>>> the HF radio's signal to get me on 2200, 1750 & 600 meters. I am >>>> licensed as a Part 5 station on those 3 bands. Will the K2 operate >>>> in that band at & below 80 meters? I only need the transverter >>>> ports to function, not the HF power amp. >>>> >>>> Many thanks, >>>> Mike >>>> WE0H >>>> >>>> >> > ______________________________________________________________ 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
