View Single Post
Old 4th Nov 2018, 4:06 am   #44
Terry_VK5TM
Nonode
 
Terry_VK5TM's Avatar
 
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,340
Default Re: RF power meter calibration

There was at one stage the proper termination pcb's to go along with the RFP resistors for sale on the usual sites.

Similar to the drawing attached, they were single sided and cost more than the resistor itself.

Piece of scrap pcb and a sharp knife would knock one up in no time and for almost nothing.

(For reference, the track is 2.8mm wide as is the spacing between track and ground area and the coax needs to be terminated both sides of the track. Spacing based on average Er of FR4 material).
Attached Thumbnails
Click image for larger version

Name:	Termination pcb.JPG
Views:	81
Size:	31.4 KB
ID:	172106  
__________________
Terry VK5TM
https://www.vk5tm.com/
Terry_VK5TM is offline