RN7B

I was born in 1948 in the city of Samara (also Kuibyshev 1935-1991).

Since 1973, I have been a specialist in fixed and mobile RF and VHF radio communications and certification tests of radio equipment at various factories. Ph. D.in Technology.

My first mentor in my professional career was Victor Ivanov (SK) UA4HP (ex UE4OB, UA4HB) and Leo Petunin (SK) UA4IU.

Made my first steps in Amateur radio with the participation of famous 40-50-60 years of Amateur radio Alexander Kamalyagin (SK) UA4IF (ex U1AP, UH8AF) and I spent a lot of time on the collective radio station UK4HAW working on the air with my colleagues UA4IU, UA4IQ, UA4IN, UA4IJ, UA4HAL, UA4HBP, UA4HBR, UA4HFK and others Operators.
From 1971 to 1978, I had the call sign RA4HDE and worked only on 28 and 144 MHz, mainly AM, SSB. From 1979 I have a call sign UA4HAD and I work (with a break from 1990-2017) to the present time on all ranges permitted in Russia, mainly digital types of communication.

In July-August 1989 I was a member of a DX expedition U-DX-Club to the Koryak national district of Kamchatka (QTH: Ust-Khairiuzovo) with the call sing 4L0X and operators: UA0IAP, UA0IAY, UA0ZDA, UA4HBR.
I was a member of the DX expedition in July 1990 with the call sign RW0I to ITU 25 zone (QTH: Chaibukha), to work in the IARU HF Championship with my colleagues: UA0IAP, UA0IAY, UA9KO, UA4IU (SK), UA4HBR, UB5ILU.
The organizer and leader of both expeditions was the famous northern radio operator Veniamin Pavlov (SK) RX3VJ (ex UL7QJ, UV1PB, UL7LX, 4J0IAP, UA0IAP).

My second hobby is designing and making homemade transceivers for radio Amateurs. Communication with famous radio protectors Yaakov lapovok UA1FA (SK), Gennady Shulgin (SK) RZ3CC (ex UZ3AU, UA3ACM), Boris Stepanov (SK) RU3AX (ex UW3AX), Vladimir Belousov (SK) UA3CA and others allowed us to gain knowledge and experience.

As a result, in the 70-80 years, together with Valery Kobzev UW4HZ and Gennady Roshchin (SK) UA4IQ, a series of transceivers KRS-28 (KRS-28), KRS-78, KRS-81 (with the participation of Leo Petunin (SK) UA4IU) and linear amplifiers UM KRS-81 was developed and made.

After finishing my work in Samara in 2022, I moved to a new place in the village of Khutor Utash near Anapa. For a while, I worked under the call sign UA4HAD/6, and in January 2024, I began operating under the new call sign RN7B.

See you on the bands!

Good luck to all!

73! Sergei Sevostianov