Hello OMs,
Measured values
Original LNBs (many typs: groove feed, Rocket) Upper Beacon SNR 17. . . 20db
LNB with Poty + dielectric lens (PA) 10dB
without 10dB
http://www.hybridpretender.nl/patch.pdf
Polyamid is a mistake: A Test in microwave stove: the part gets very hot in 1 minute
Polyamid poor: High dissipatipn factor !!
Dissipation Factor (DF) of Plastics - Unit, Formula and Measurement
PA tanδ 0.01 . . 0.06
PE 0.0003 . . 0.002
PTFE 0.0002
2 questions:
does anyone have information about the f/d ratio for a Kathrein CAS 124. I could not get any info from Kathrein in 2019.
Looking for one long Cylinder lense ( #1, right hand side) to replace the genuine lense supplied with the original poty kit.
73,
Charly DF5VAEforum.amsat-dl.org/cms/index.php?attachment/4140/forum.amsat-dl.org/cms/index.php?attachment/4142/
@ DF5VAE: Can you please provide measurements and a sketch for lens '1' and '2'
How is the installation on the LNB?
ich habe hier die "abgesägte und mit 22mm Kupfer Fitting aus dem Baumarkt" Version.
Wer es dicht haben will, kann den Kupfer Fitting mit 1 Tropfen Silikon beim zusammenschieben abdichten.
Gruß
Robert
forum.amsat-dl.org/cms/index.php?attachment/3852/
forum.amsat-dl.org/cms/index.php?attachment/3666/
The high frequency flows on the surface in the pipe
Is a gap of 0.5mm bad? The high frequency can't go any further here
Lengths (transformation!)?
The copper pipe 22 / 20 mm - The diameters don't fit: LNB 19. . 22mm. Each LNB ist diffferent.
Making an adapter on the lathe?
Or the waveguides face to face?
73
Hans-Jürgen