Hi, welcome to my blog !

My name is Jerzy and thanks for dropping in. I am very glad you are surfing around here so I would like to take this opportunity and present myself. I have been a radio amateur since 1969. My first SWL signature was SP8-1871 and a short time after I got SP8DXL. After 1976 I used SP2DXL and since 1988 I am LA4YGA. From 2004 I am also as SP4DXL when visited Poland. My QTH is Kristiansand, in the south part of Norway, WW locator is JO48be. My favorite subjects in HAM radio are VHF/UHF propagation and construction of RF equipment.

Standings

Standings

Worked DXCC entities and squares

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Modification WCDMA 2170MHz to 13cm

For original description of the modification go to IZ4BEH¬†. The page is in Italian but using Google Translator is easy to understand main ideas and way to go. I found it very easy to do. One should be, of course, ¬†very carefully not to damage components around the modified places. With 28V supply it is […]

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WSPR Power Amp

Finally finished a power amplifier for Ultimate3S. The idea I had found on net, see page VK3PE¬†. I contacted¬†Glen and he gave me needed GERBER files to order PCB. Used ¬†Seeedstudio.com¬†and got 5 pcs very quickly. Had some problems to complete components, see my story about fake RD166HHF1 devices. Finally ampilfier is ready and working.¬†I […]

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Beware fake semiconductors

I bought a pack of 5 x RD16HHF1 HF power mosfets via eBay from good-module based in China and ended up with a problem, devices were supplied but they weren’t RD16HHF1’s ! ¬†ūüôĀ I fitted one device on¬†the amp PCB and applied power. The power supply went into overcurrent shutdown straight away! Measurements indicated that […]

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IC 7100

ICOM IC-7100 ALC modification

After updating soft to Release E5 for sometimes ago I decided to do hardware modification as well. For instruction and explanation I recommend go to TRX Bench on YouTube –¬†https://www.youtube.com/watch?v=YaGy4pUxkHc¬†. The rig after modification is working excellent and issue with low power is solved.

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10GHz sked with OZ/LA8GT

Today had a sked with OZ/LA8GT. Tore was in JO47md (Bulbjerg 47 m asl). Unfortunately weather in OZ was bad, wind 40 km/t and Tore had problems to keep all on the place. ¬†No QSO with him. Later I manage a contact with OZ9PP Peter in JO47va (Aalborg) on CW with 559 both side. New […]

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