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
