Ian, Much forethought was put into this (at the design stage). We knew ahead of time that the 6-m MDS was going to be in the -135 dBm range with the internal preamp, due to the losses in the T-R switching and narrow band-pass filtering. Both were required for this design.
A separate 6-m preamp would only have boosted 6-m MDS by a couple of dB because it follows the other front-end losses. Thus we elected -- from the start -- to provide for an *external* 6-m preamp, patched between RX ANT IN/OUT. With this solution, we get a world-class 6-m MDS in the -144 dBm range, and you don't pay for it unless you need it. Every rig has tradeoffs. This was one of ours. 73, Wayne N6KR Ian White GM3SEK wrote: >> As Wayne's often mentioned here, the advanced up-conversion design of >> the K3 is superior for HF but makes incorporating VHF a real >> challenge. > > No challenge at all... had it been thought about at the design stage. --- http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
