WOWEE!!! Rocco and others, thanks SO much for steering me into adjusting the passband - you were right on the money and you're right the results are MAGIC. The negative voltage reading on the passband slugs were way off when I first started. After peaking each one for maximum negative voltage, the receiver is soooooo much better - like night and day. And the passband works perfectly now; no more equal cw carriers on each side when tuning the same signal!! AND the S meter now works correctly as I set that per the manual too...
I am grateful! Thank you! 73 John K7FD From: "Rocco Lardiere" <[EMAIL PROTECTED]> Subject: Re: [drakelist] R-4B both sidebands...second try > > > John, > > > > > > First, make certain that you are operating the controls properly - esp > the > > > passband tuning and bandwidth - since they interact. Next, check the > > > physical position of the passband tuing knob - sometimes they have been > > > removed/replaced - just a few degrees can make a big difference. See if > > > there is a position that makes sense with regards to opposite sideband > > > suppression - then loosen the setscrew, move the knob (not the shaft) > and > > > see if this new position works for all modes, paying attention to the > > curved > > > lines and dots. > > > > > > If this does not do the trick, you should align the reciever per the > > manual, > > > paying particular attention to section 6.4.8. Follow the directions > > > precisely, especially regarding the exact position of the knob with > > respect > > > to the curved lines on the panel. I have found that every one of the R4 > > > series receivers I have bought required a careful alignment of the > > passband > > > tuner. The difference after alignment was like magic. Caution - moving > > the > > > passband tuner slugs is very tricky. They are fragile. The tips can > > > sometimes rotate, but not the actual springy shaft. I use a needle nose > > > plier GENTLY to make sure the shafts are actually rotating (you should > be > > > able to see them move in and out as you rotate) and hear the difference > in > > > the speaker. Then I use a small alligator clip to grab the tips after > the > > > shafts move freely; you could try the alligator clip first to see if > does > > > the trick. The alligator clip works pretty well to allow you to adjust > > the > > > passband tuning properly. You should repeat this several times as > needed > > > for consistent results. Warning - the tuning components are fragile and > > > difficult to replace. > > > > > > The directions in the manual are good, but this is a very challenging > part > > > of the alignment for some - read it over several times if you have never > > > done it before. > > > > > > When aligned, these receivers sound much tighter and are wonderful to > > listen > > > to. If this alignment fails to produce those results, you might have > > > component problems in the passband tuing section. That can be a real > > bear. > > > > > > I am sure others on the list who have tried this alignment would have > more > > > to say about the subject. > > > > > > Good luck. > > > > > > Rocco N6KN ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
