One correction ... I misread the MC14028 spec sheet. There is no "none of the above" output from the 14028. To include 6 meters, it will be necessary to add a separate decoder for BCD 10 ... not difficult but just one more step.
73, ... Joe, W4TV > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Joe > Subich, W4TV > Sent: Monday, June 02, 2008 4:33 PM > To: 'Jerry Flanders'; [email protected] > Subject: RE: [Elecraft] K3 and Icom PW-1 > > > > > IIRC, this method only works for the major bands. ICOM did not > > provide for the others. > > Actually, my design uses a resistive divider network - with standard > 2% resistors - that takes +12V (regulated for reliability) > and provides > the proper voltage for all bands 160 - 6 M based on which tap is > grounded. It is a bit different than the Top Ten approach which > uses individual trimmers to set the output voltage for each "band" > and source drivers that have been discontinued. Note - Icom uses > the same voltage for 17/15 and 12/10 so it requires 8 outputs to > cover 160, 80, 40, 30, 20, 15/17, 12/10, and 6m. The decoder does > not directly decode 6 meters (BCD 10) but the circuit can be > configured to select 6 as a "none of the above" case (BCD 0) or > a dedicated 6 M circuit could be added to the basic decoder. > > I have been asked off-line if I would be willing to offer and > interface - either complete or as a mini-kit. I have no interest > in building a complete product "by hand" and the cost of a small > run in Europe is currently prohibitive. However, I'll ask here > one time only ... how much interest would there be in a kit? > Should a kit include a case or are users likely to incorporate > it in another piece of equipment? > > Responses direct only ... > > 73, > > ... Joe, W4TV > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > Jerry Flanders > > Sent: Monday, June 02, 2008 1:48 PM > > To: [email protected] > > Subject: RE: [Elecraft] K3 and Icom PW-1 > > > > > > IIRC, this method only works for the major bands. ICOM did not > > provide for the others. > > > > Jerry W4UK > > > > At 01:42 PM 6/2/2008, Dick Dievendorff wrote: > > >See also Top Ten Devices application note #3, > > >http://www.qth.com/topten/apnote3.htm > > > > > >Unfortunately the schematic doesn't seem to show up (on my > > browser), but > > >I've seen the schematic before. It's the BCD to voltage > > divider network > > >(with trimmer pots) that Joe mentions below. > > > > > >The schematic was once at > > http://www.qth.com/topten/icomencd.gif but the > > >file doesn't seem to be there now. > > > > > >I'll forward this to Dave Hawes of Top Ten Devices; maybe he > > can get the > > >image file restored. > > > > > >73 de Dick, K6KR > > > > > > > > >-----Original Message----- > > >From: [EMAIL PROTECTED] > > >[mailto:[EMAIL PROTECTED] On Behalf Of Joe > > Subich, W4TV > > >Sent: Monday, June 02, 2008 9:30 AM > > >To: 'Bob Serwy'; [email protected] > > >Subject: RE: [Elecraft] K3 and Icom PW-1 > > > > > > > > >Bob, > > > > > >There are two approaches that will work to do automatic > > >band switching with the K3 and PW-1. The first is to use > > >something like the microHAM Band Decoder (or new Station > > >Master which replaces Band Decoder) to convert the Elecraft > > >(Kenwood) "IF;" CAT data to Icom CI-V Transceive broadcasts. > > >The second would be to build a BCD to 1 of 10 decoder and > > >use that to drive a voltage divider to create the Icom > > >compatible "Band Select" voltage. > > > > > >The Station Master will be available off the shelf after > > >Friedrichshafen. I can supply notes on the BCD decoder > > >approach but have not built/tested any devices. That is a > > >"low tech" solution and not something microHAM is likely to > > >produce and I'm not inclined to get involved in building "one > > >off" units since that is a relatively high cost/low return > > >proposition. > > > > > >73, > > > > > > ... Joe, W4TV > > > > > > > > > > > > > -----Original Message----- > > > > From: [EMAIL PROTECTED] > > > > [mailto:[EMAIL PROTECTED] On Behalf Of Bob Serwy > > > > Sent: Monday, June 02, 2008 11:24 AM > > > > To: [email protected] > > > > Subject: [Elecraft] K3 and Icom PW-1 > > > > > > > > > > > > Any one has a K3 and a PW-1 hooked up for automatic band > > > > switching of the PW-1? If so, how as it accomplished? > > > > > > > > Thanks > > > > > > > > Bob Serwy - N9RS > > _______________________________________________ Elecraft mailing list Post to: [email protected] 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
