Antenna by Panda

24/08/2026

For sale: 4 Elements Twin Yagi Amateur
Price: 6,000 PHP
Shipping: Via LBC anywhere in the Philippines

4 Elements Twin Yagi 2m/VHF (Lightweight End Mount) Original Handcrafted / Quality Build (Antenna data Generated with 4Nec2) Gain Stacked Configuration: 12dBi (9.85dBd) ( see 4Nec2 sim 142 – 148Mhz) Gain individual antenna: 9.39dBi Center Frequency: 145Mhz Matching: Gamma Match (Tuning stub) Phasi...

24/08/2026

https://dw1zws.com/build-a-sleeve-dipole-antenna-2m-vhf/

Build a 2m VHF lightweight sleeve dipole antenna. A compact portable antenna and easy for deployment. You can even operate the dipole holding it.

15/08/2026

https://www.youtube.com/watch?v=VxzhUTFNkTE

2m/70cm Dualband yagi antenna 144/430Mhz with 10Mhz bandwidth on th...

15/08/2026

5 Elements Yagi (Folded driven elements)
For Sale : Php 4600.00
Shipping : LBC (Only nationwide)

10/08/2026

https://dw1zws.com/replacing-nanovna-toggle-switch-with-more-rugged-push-button-tactile-switches/

NanoVNA toggle switch replacement with push button tactile switches NanoVNA devices is generally well built in my opinion except for its toggle switch to navigate the menu system and move the cursors around the screen. The toggle switch used on my device is unfortunately too flimsy it just broke aft...

05/08/2026

https://dw1zws.com/national-semiconductor-voltage-regulator-handbook-1980/

The National Semiconductor Voltage Regulator Handbook is an indispensable tool for power supply circuit design and trouble shooting tool. Reading the book will help you quickly trouble shoot power supply related problems as the designs are integrated on most power supplies circuit available on the m...

04/08/2026

https://dw1zws.com/original-patent-design-for-folded-dipole-antenna/

A folded dipole is an antenna with the ends folded back forming a loop. The impedance of this antenna is around 300 Ω, so you may want to use a transformer or a λ/4 long piece of 120 Ω coaxial or 75 Ω cable to match this impedance to 50 Ω. Geometry is not that […]

03/08/2026

First lab, never dies...

03/08/2026

https://dw1zws.com/2x3-2m-70cm-cross-element-yagi-build-instruction-compact-that-works/

Compact satellite communication antenna If you’re a fan of satellite monitoring (hunting for birds) as they call it, you probably want a bigger antenna with lots of elements for good contacts. Long antennas are good for satellite contacts with low elevation angle now the downside of those antennas...

01/08/2026

https://dw1zws.com/build-the-3-x-5-elements-2m-70cm-dualband-yagi/

Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). The antenna has good reflection coefficient and VSWR ratio @ 1.2:1 at center frequency and 1....