Posts

DL1DN ham radio extreme: HF SSB QRPP QSO´s down to19mW !

I´m interested to make contacts with less than 1W, so I decided to build up an QRP attenuator to reduce the power down to -21dB.
Example:
Transceiver output 2,5W
-3dB = 1,25W
-9dB = 313mW
-15dB = 78mW
-21dB = 19mW

/11 Comments/by

Review: Dell Latitude 14 Rugged Extreme

Review: Dell Latitude 14 Rugged Extreme
This MIL-STD 810G, 461F and IP-65-rated device can withstand electromagnetic interference, driving rain, blowing dust and sand, continuous humidity, salty fog, high altitudes, low temperatures and shocks of all kinds. Dell also claims that it can take …
Read more on CRN

UCSD Researchers Collect Cosmic Microwave Data
The partial polarization that POLARBEAR is studying occurs when light, as an electromagnetic wave, has more of its electric field oscillating in one direction than in another. The CBM that POLARBEAR detects has been shown to be partially polarized and …
Read more on The UCSD Guardian Online

Gulfstream corporate jets rely on Burnaby company's water treatment devices
A water treatment system must not interfere with any of these functions. On an airplane, even a simple coffee maker needs to be fastened down, be designed to avoid creating electromagnetic interference, and be able to handle 9Gs of impact resistance …
Read more on Vancouver Sun

/0 Comments/by