Astrid
Full Member level 3
I make copy of RF (15MHz) 150W class F amplifier. with fifth order output network. In original output network is about 15pcs SMD 1210 Silver Mica capacitors 150 pF or less, all for voltage min 200V.
I was looking at the availability and cost of 1210 Silver Mica and found only this
2.56 euros for me not acceptable price.
SMD mica capacitors can buy from someone else for more reasonable prices?
Though holee mica capacitor 150pF buy for less than 0.5 euro.
The second idea is to use instead of silver mica ceramic with NPO dieletric. Both types have Precision + -5%. Temperature Coefficient: +-25ppm/C for Mica and +-30ppm/C for NPO. ESR may be worse at NPO. It's good idea?
Availability 200V 1210 SMD is not the best , substantially accessible size 1206.
What worsens sizes using 1206 instead of 1210?
I was looking at the availability and cost of 1210 Silver Mica and found only this
2.56 euros for me not acceptable price.
SMD mica capacitors can buy from someone else for more reasonable prices?
Though holee mica capacitor 150pF buy for less than 0.5 euro.
The second idea is to use instead of silver mica ceramic with NPO dieletric. Both types have Precision + -5%. Temperature Coefficient: +-25ppm/C for Mica and +-30ppm/C for NPO. ESR may be worse at NPO. It's good idea?
Availability 200V 1210 SMD is not the best , substantially accessible size 1206.
What worsens sizes using 1206 instead of 1210?
