Hello,
Does anyone have a good way of measuring the frequency of PC board micro
strips (M/S)? I have tried my old Millen Grid Dip meter but there is just
not enough radiated at 220 MHz to get a good dip. I am trying to modify a
transmitter from 168 MHz to 224 MHz and not having a lot of luck
Does anyone have a good way of measuring the frequency of
PC board micro
strips (M/S)?
I'm not exactly sure what you're asking. Microstrips are basically just
sections of transmission line. A transmission line doesn't have a
frequency - it has a length and a characteristic impedance.
You
At 10:09 AM 2/6/2006 -0600, you wrote:
Does anyone have a good way of measuring the frequency of PC board micro
strips (M/S)? I have tried my old Millen Grid Dip meter but there is just
not enough radiated at 220 MHz to get a good dip. I am trying to modify a
transmitter from 168 MHz to 224 MHz
Yea, what Jeff said! :-)
At 03:08 PM 2/6/2006 -0500, you wrote:
Does anyone have a good way of measuring the frequency of
PC board micro
strips (M/S)?
I'm not exactly sure what you're asking. Microstrips are basically just
sections of transmission line. A transmission line doesn't have
Are the transistors rate at 220 MHz? RF power transistors are made for a
specific frequency range and will not operate at all well above or below
the design frequency.
73
Glenn
WB4UIV
At 11:09 AM 02/06/06, you wrote:
Hello,
Does anyone have a good way of measuring the frequency of PC board
At 06:27 PM 2/6/2006 -0500, you wrote:
Are the transistors rate at 220 MHz? RF power transistors are made for a
specific frequency range and will not operate at all well above or below
the design frequency.
---I bet to differ, at least when it comes to using one at a lower
frequency!
RF power
At 03:34 PM 2/6/2006 -0800, you wrote:
But assuming they're properly bypassed,
an RF device rated for, 500 Mhz, will work perfectly well at 150 Mhz and
with more gain!
--I should add the caveat with all things being equal, in that
parameters such as input and output impedance, etc need to be
The selective frequency information comes from the engineers at EIMAC. When
I toured their plant a number of years ago, I asked about the frequency
selectiveness of the transistors. The engineer told me that a UHF
transistor will not work at VHF. The impedances are wrong as well as the
At 06:57 PM 2/6/2006 -0500, you wrote:
The selective frequency information comes from the engineers at EIMAC. When
I toured their plant a number of years ago, I asked about the frequency
selectiveness of the transistors. The engineer told me that a UHF
transistor will not work at VHF. The
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