5% 0402 or 0603 NPO Capacitors
Adjustable inductors
Available for all individual HF amateur bands
A miniature high-quality PCB has been produced, the capacitors and special inductors have been ordered and some DIY KITs are now ready. Each of them has a unique code number to help us keeping track of the inventory of the components and ensure error avoidance. There are 9 filters available, one for each of the Amateur Radio HF bands and a 10th is getting ready for the new 5 MHZ band. Each of them is offered as a DIY KIT or ready-made and tested. They can be used in receiver input stages, before a preamp and maybe a second after the preamp, to make switched preselectors or multiplexers. They can only work with low-level transmit applications at mW level to clean up VFOs, mixers before a power amplifier, for experiments and measurements. Especially cleaning RF signal generators for IMD measurements. Aligning the filter is very easy, by adjusting the two variable inductors with a ceramic or plastic slot-tip screwdriver.
The PCB is of highest quality, with 1-oz copper layers, gold plated and 0.8 mm thick FR4 but minimal in size so to be able to fit into your project. Between the two variable inductors there is a 3 mm hole for a supporting screw. The input and output ports have three 2.54mm spaced pads with holes, so ordinary pin-headers can be used for mounting them.
The KIT includes a high-quality ENIG FR4 PCB (36.7 x 14.2 mm) that comes with all components for you to solder them on the PCB
Hi-Q variable inductors and RF capacitors (C0G - NPO) are used for all the circuits.
For more pictures, schematic etc please visit sv1afn