Mike, The only person that would change the firmware would be Wayne Burdick himself. In the K2 it would require replacement of the firmware chip because K2 firmware is not downloadable like the K3.
You would likely have to pry Wayne away from his K3 MCU firmware efforts to get his attention, but you certainly could ask. 73, Don W3FPR Mike-WE0H wrote: > 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
