On January 4, 2013, a big fire destroyed the historical building with the office of RF Systems. All administration, computers, email messages, addresses and so on are lost. The fire was caused by a switching mode mains adapter (made in China) connected to a portable hard disk, used to make back-ups of our computer data during the night. Fortunately our measuring laboratory and production facilities are not damaged. Although there is some delay, production and development goes on. As all addresses and correspondence are lost, we will ask all customers who are in contact with us, to resend their emails and their addresses. We apologize that we were unable to answer mails in the period of January 4 to January 31, 2013. Although we have to arrange a lot of things to overcome this disaster, we will work very hard to return to business as usual.