sv5fri

5th Greek Telegraphy Club CW Cup

gtc_logoThe 5th GTC CW Cup which will be held next weekend (Saturday 03/10/2015 – 12:00 UTC – Sunday 04/10/2014 – 11:59 UTC).

Also, at the site of RAAG (http://www.raag.org) you will find further information on using and configuring the proposed contest software that supports GTC CW Cup.

I would like to thank G4OGB where has created files for contest GTC CW CUP to support N1MM software.

Problem with TVI interference

My problem was when I worked in 40m ( with power over 40 watt) my the  TV (LCD) was started automatically start up and shutdown.

I tried with differend ways to solve this problem but the result it was disappointing. After lot of  hours studing I found the solution.

The Combined Braid Breaker and High-Pass Filter.

This device prevents HF signal currents from flowing down the inner or outer of the co-axial cable. L1 has a low reactance to HF or VHF signals, thereby bypassing the interfering current, whereas C1 and C2 have high reactance to HF and VHF, effectively locking signals to the receiver. L2 provides a further short-circuit (to HF and VHF signals) across the connections on the receiver side of the filter. Continue reading…