ARRL

WA0CBW

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
Antenna Modeling for Beginners Feb 8th 2013, 18:19 3 1,375 on 14/2/13
Roller Inductor Tuner Dec 20th 2011, 19:26 1 1,293 on 20/12/11
Using Ladder Line Jul 27th 2011, 19:43 3 2,222 on 29/7/11

Latest Posts

Topic Author Posted On
Cushcraft R8 SWR Problem KI3T on 21/10/14
You say the connector spins so I would look closely to see if the wires going to the connector are broken or shorted. The fact that it spins can't be a good thing. A spike in SWR could be an indication of an intermittent or shorted connection. That loose connector would be my first choice.
BB
External DC Source for Desktop Yaesu FT-60 KD8ZIH on 15/10/14
Looking through the manual it appears that the radio was not designed to operate off anything but the attached battery. It can be hooked up to an external ~12-volt power supply for charging the battery (or the supplied "wall wart" AC supply). It appears that the external supplied voltage charges the battery and should not be used once the battery is charged. Since the radio operates on 7.2 volts one could build a 7.2 volt 2-amp power supply. The alkaline battery pack could be used to make the connection to the radio. It might be possible to build the power supply into the alkaline battery pack.
Mast Gounding pwolsko on 4/6/14
The NEC defines what is a ground electrode and a sewer pipe is not listed. The proper way would be to install a ground rod. The NEC also requires that ALL ground electrodes be connected to the main house electrical ground electrode as described below in Section 810.21 (J):

810.21 (J) Bonding of electrodes. If a ground rod is installed to serve as the ground for the radio and television equipment, you must connect it to the power grounding electrode system with a minimum 6 AWG conductor. The bonding of separate system electrodes reduces voltage differences that may develop between them.
Bill
radio help KI6KIS on 3/6/14
If you plug in a headphone do you hear audio?
Bill
Plus or Minus QRM kn0ji on 23/4/14
It means to move up or down from the "noise" on the specified frequency. The "noise" could be atmospheric or man-made (someone on the frequency?).
Bill

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