And, that makes a lot of sense, because the synthesizer's oscillations
create more peaks per unit time (a definition of frequency), and
therefore consume (or require) more power to do so than when the
synthesizer is running at a lower frequency. Think of a car's engine:
it uses less fuel at idle than at high RPMs. So more power being used
in the synthesizer is going to make it hotter, since any electronic
component is not 100% efficient and unused energy is spent as heat.
73 de Ray
K2ULR
On Aug 20, 2014, at 7:32 PM, Wayne Burdick wrote:
The synthesizer I.C.'s current drain, and thus its operating
temperature, vary in direct proportion to operating frequency.
73,
Wayne
N6KR
On Aug 20, 2014, at 11:50 AM, on4iq <[email protected]> wrote:
I recently started extensive temperature testing on the KX3 to get
more data
on dissipation and stability.
For starters stability in RX. KX3 in original setup. Serial below
#2000
I noticed that for a steady ambient temperature the oscillator
temperature
varies with frequency used.
Has anyone else similar observations? Temp taken after long (2h)
warm up
For example:
50MHz: 39°C
28MHz: 37°C
7MHz: 36°C
PA in RX remains 28°C
Any feedback is welcome.
73 Johan
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