![INFO](/info.jpg) |
Scope
Applies to Ronja Twisters built to guide before 1st September
2005. The bugfix is now part of the guide. |
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![INFO](/info.jpg) |
Problem
TV or radio reception is interfered by Twister. The interference is
spread by pair of coaxials going from Twister to RX and TX or spreads
from Twister towards DC power supply and possibly into (230V) mains
supply. |
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![INFO](/info.jpg) |
Limitations The level of interference drops by the bugfix
from 30mVpp to 2mVpp. The fix is not perfect. Twister will have to be
mechanically redesigned to get rid of the radiation completely. 2mV is
insignificant level from biologic point of view. The radiated RF power is in
order of 0.1mW. (Calculated as 1mV RMS into 100Ohm load.) |
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AC/DC adapter connector
Solder a 100nF capacitor (C114) between the inner contact and box. |
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Terminal block
Solder a 100nF capacitor (C113) on the rightmost stub on the picture.
Solder the other end to the
box. |
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