Questions which involve the properties or applications of individual electronic components.
Questions tagged [electronics]
115 questions
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Why are germanium diodes specified in amateur radio designs?
It's somewhat common to find a schematic that calls for a germanium diode in amateur radio contexts. For example:
This is a QSK circuit from the Fldigi manual.
And yet, purchasing a germanium diode is a relatively difficult task. For example,…
Phil Frost - W8II
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New to Amateur Radio
I'm new to radio, and I'm trying to get into the electronics aspect of it.
I was wondering if it was at all possible to build your own transmitter, receiver, etc. (basic radio components) as good beginner project.
I've searched the Internet for…
rmutalik
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Are there an MTTF/MTBF/MTTR data on the typical tubes used in the FT-101/TS-520?
I browse ebay.com for used rigs in good condition and approaching my shoe-string and ... There appear to be a decent quantity of boat anchors out there - FT-101, TS-520, TR-4 to name just a few.
By definition, a boat-anchor would date to the…
VU2NHW
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What are the advantages for a receiver that uses an IF compared to direct conversion?
What are the advantages for a receiver that uses an IF compared to direct conversion ?
Andrew
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Can anyone please suggest a substitute for the BFY51 transistor?
I have to replace a faulty BFY51 Transistor. I could not find one in the market since they have been discontinued. What is a suitable replacement?
Kunu_Apple
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Series resonant circuit, how to calculate voltage across the capacitor?
This is question a3i3-1 from the practice questions in the book "amateur radio Exam Secrets":
A series resonant circuit has 10V peak across it when at resonance. At that frequency the resistance of the coil is approximately 4Ω and the Q-factor is…
Pablo Fernandez
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Why doesn't adding a resistor inline to a 12 V car charger change output voltage
I purchased a baofeng car charger for my little UV5Rv2 HT. It was advertised to work with the radio, so I didn't think much of it. It turns out, all it does is pass my car electrical system voltage through to the base charger! Looking at the base…
mikew
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Are jammers relate to electronics or electrotechnics , why?
Are jammers relate to electronics or electrotechnics , why ?
Please ,tell me the main difference between electronics and electrotechins and why we can classify jammers as electrotechics or electronics ?
Indeed i didn`t found this information in…
tcma13
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What is the required signal-to-noise ratio for a AX5042 transceiver?
What is the required signal-to-noise ratio of a AX5042 transceiver IC?
shweta
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What would happen if I created this circuit?
As you can see, one of inputs of a XOR gate is connected to the output of the same XOR gate. Each time when the output is "true" it influences its input and it makes the gate change output to "false". But when the output is "false" it's redirected…
KarmaPeasant
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What does "HF-QUARTZ 4.19 MHz" on a ~1980s wall clock mean?
I have a wall clock from the 1980s or early 1990s. Probably 1980s. It has a black box behind/"inside" it which powers the whole thing. It's made by Quartz.
On the black box, it says "HF-QUARTZ 4.19 MHz". What do they mean by "HF" and "4.19 MHz"?…
clock
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