I am short sighted and my near vision is still quite good however I use a set of thin 'dollar store' +2 reading glasses when I do SMT work on my bench, these go over my normal glasses and give me some binocular magnification for doing fine (re)work. Choose the magnification factor in the shop such that you can still focus at your normal working distance and get thin ones so that you can look over the top of them for looking at stuff further away (like the scope, PC etc)
Much cheaper than an optivisor and a big help at the bench 73 Brendan EI6IZ On Fri, 2010-06-04 at 20:11 +0100, Doug Turnbull wrote: > Mike, > Another solution is to have a pair of glasses for radio use. I have > set of bifocals which are used for computer and radio with roughly a thirty > inch focal length and reading at roughly fourteen inches. I find them very > convenient in the radio shack. > 73 Doug EI2CN > PS What have we come to talking this way. > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike K2MK > Sent: 04 June 2010 19:50 > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 filter display size > > > Hi Joe: > > Here's a low tech solution: "trifocals". I sit about 28" from my computer > screen and about the same from the K3. The middle range of my trifocals is > perfect. Same problem and solution for the speedometer on the car's > dashboard. > > 73, > Mike K2MK > > > > > > Don, > > > Yes, there is a lot of granularity to that display, but it still > > give a good idea of the filter placement within the audio spectrum > > The problem is that there is no change between 500/400 Hz or between > 250/200 Hz. That means it is not possible to determine if a 400 Hz > or 200 Hz filter are selected only from the filter width display. > In the case where the "FLn" icons are too small to be read with one's > distance lenses and the radio is too far away for the reading lenses > the filter width display should be an important clue to the selected > filter. > > 73, > > ... Joe, W4TV > > On 6/4/2010 10:00 AM, Don Wilhelm wrote: > > Mike, > > > > That truncated pyramid should change as you move the HI/LO CUT or > > SHIFT/WIDTH knobs. In other words, it should respond to changes in the > > DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are > > not illuminated, push one of the two buttons in - then turn the HI CUT > > knob counterclockwise. The segments to the right should drop off as you > > rotate the knob. > > > > Then switch to the SHIFT/WIDTH display - rotate the shift knob and the > > display should move left to right (no change in width), and rotate the > > WIDTH knob to change the width - when you go counterclockwise, it should > > go down to 50 Hz and the number of bars will be only two. > > > > Yes, there is a lot of granularity to that display, but it still give a > > good idea of the filter placement within the audio spectrum > > > > 73, > > Don W3FPR > > > > Mike wrote: > >> The truncated pyramid icon that displays a filter's width only has 2 > >> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7 > >> 'segments') for both the 400 and 250 filters. Is that the way it's > >> supposed to be? The wording on the xfil display is getting too small for > >> these eyes. > >> -- 73 Brendan EI6IZ ______________________________________________________________ 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
