Blog

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Dec 28, 2023
Category: General
Posted by: lex

Adding some safety to my UpCon6W from Amsat-DL. A WG2020X Isolator from RF-TyT to protect me from screwing things up. 

Read more . . . 

Jul 24, 2023
Category: General
Posted by: lex

Today I received my QRP-Labs QMX. So I started building it and tried to document the build.


Continue reading . . . .

Apr 11, 2023
Category: General
Posted by: lex

Spring cleaning in my shack. While stocks last, I'm giving away sets of 2 old stock PCB's for my QRP-Labs broadcast band filter for postage cost only. Checkout: https://www.ph2lb.nl/blog/index.php?page=bc-filter and if you like it, fill in the webshop order form http://ph2lb.nl/webshop/order.php to get yours. 

Mar 28, 2023
Category: General
Posted by: lex

 I have added new K2 mods and articles to this website . . . . (continue reading)

Jan 18, 2023
Category: General
Posted by: lex

I'm now on HamShack Hotline 420-000-0225 (or the short number 84225)

Continue reading . . .  

Dec 25, 2022
Category: General
Posted by: lex

When you want to measure output power and don't have a power or dBm meter, but do have a oscilloscope and a 50 ohm load, you good to go.

Check out this page on which I describe how to do it. 

Continue reading . . . . 

Dec 13, 2022
Category: General
Posted by: lex

I updated the 40dB RF Sampler page because although I was very happy with the result, I found out that I forgot a small thing.

To be exact, a small piece of wire which flattens the curve on higher frequencies. 

Continue reading.....

Dec 3, 2022
Category: General
Posted by: lex

In the winter of 2022 I bought the original TinySA at Eleshop and when they published that the would sell the TinySA Ultra, I ordered it right away.

Continue reading . . . . . 

Oct 6, 2022
Category: General
Posted by: lex

The last weeks I have worked on a few small mini projects :

Jul 31, 2022
Category: General
Posted by: lex

The used Elecraft K2 I got my hands on needed some work on the 20m band and for the alignment of the 20m BPF I could follow the Elecraft manual. But owning a NanoVNA . . . . . well you know where this is going ;-)

 Continue reading   

Jul 30, 2022
Category: General
Posted by: lex

I got my hands on a used Elecraft K2 which needed some work. 

And as always I started working on it and added a usb mod

Jul 12, 2022
Category: General
Posted by: lex

My OZ2CPU digitale RF mW-dBm-mV meter has a  input range from 1nW to 1W which is good enough for QRPp rigs and my TinySA has a imput limit of +10dBm / 10mW.  When you want to measure on equipment which gives more output power, you need a serious set of attenuators, or you could build yourself a 40dB RF sampler.

continue reading . . .