Newbie here. Watched several videos on youtube, and a couple of websites about topic. Some questions - Note antenna is ~ 130 feet longwire, end fed in shack thru short (3 feet) section coax. I keep CAR control to ~ 10 W in TUNE mode when peaked. CAR control ~ 20% from CCW position. I have checked rig V, screen, seems to be close to spec in service manual. I also repaired 5 ohms Cathode R's (I burned them up in CW mode, lesson learned). Plate V also seems in spec, 10%. Tuneup (TUNE mode) - 1) The peak and dip seems to work fine on 160, 80, above that peaks fine but no dip with PLATE control, in fact a pronounced peak just like the DRIVE control when adjusting the PLATE control. 2) 160, 80 LOAD significant effect just like DRIVE, higher bands LOAD fairly small effect. RF in Shack - I have a small wall wart powered PC speaker on my PC. When RF is in shack it causes a buzz in speaker. Also my oscilloscope probe will pick up RF if probe anywhere near short run of coax to wire. 1) I assume this is due to antenna, 1 wavelength long, has highest E field at end of wire, feed point. 2) If I feed as center fed dipole this problem goes away ? 3) End fed like this do I have to be concerned about fire where wire comes close to house and/or passes under the window sill into the shack ? Due to arcing (I have not seen any yet) like on a humid day and house siding wet. This is a tad long winded, and thanks for help in advance. Regards, Dana.