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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
