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Questions tagged [tuner]

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Circuit diagram wanted for Aria AEQ-4 guitar preamp / tuner / equaliser

Requirement: Circuit diagram wanted for Aria AEQ-4 in-guitar preamp / equaliser / tuner module. This is a poplar unit but, surprisingly, the circuit diagram does not seem to be available on the ...
Russell McMahon's user avatar
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0 votes
3 answers
94 views

If many radio waves can generate currents in the antenna ground circuit **simultaneously** I am wondering do they all get carried over to the tuner?

If many radio waves can generate currents in the antenna ground circuit simultaneously, I am wondering do they all get carried over to the tuner circuit?, but only the current whose frequency matches ...
Jack's user avatar
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1 vote
0 answers
52 views

Television repair - connectors and standards for display panel and controller boards

All my experience comes from 2 flat TVs, so my knowledge is quite reduced and questions have to be quite broad. Questions: Are there standards or common practices from manufactures about connections ...
Daniel Perez's user avatar
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1 answer
103 views

Do all currents pass at the same time in the radio tuned circuit?

I came across the following paragraph while reading about the tuned circuit in a radio. Only the resonant frequency oscillates efficiently in the LC tank circuit, so only it will appear at the output ...
Jack's user avatar
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0 votes
1 answer
94 views

TV Hisense HLE4815RT not tuning cable signal

I have a Hisense TV HLE4815RT (mainboard: RSAG7.820.5649), that suddenly stopped tuning cable signal, it just says "No signal". I tried different cables, removing some splitter, ...
Mark's user avatar
  • 117
1 vote
2 answers
439 views

Tuning problem for an AM radio receiver

After some months I went back to try to make my AM radio work. This is the schematic: ANT is a 16 meters long straight copper wire (insulated). R1 and C2 gives a time costant \$ \tau = 114 \, \mu s\$ ...
SirLeoncavallo's user avatar
5 votes
2 answers
643 views

Why do AM radio stations have secondary frequencies?

First thing I'm sorry if this question sounds too much beginner-ish. I don't major in electrical engineering so I may lack the basic knowledge. I have been noticing that, while tuning my AM radio, ...
MattCat15's user avatar
  • 151
-1 votes
2 answers
389 views

Radio signals detection circuit

What kind of radio signals can I detect with this antenna/tuner circuit? simulate this circuit – Schematic created using CircuitLab How can I amplify the incoming signal? I guess I must use a ...
Jelly Strawberry's user avatar
3 votes
1 answer
443 views

Component identification - MELF capacitor? inductor?

I opened a circa-2005 TV tuner VHF/UHF "can" from an 19" CRT Emerson TV and found these hollow MELF components. Can anyone identify what they are? They measure as capacitors but I initially suspected ...
mcfudge's user avatar
  • 164
1 vote
1 answer
73 views

Source generator for Satellite Tuner input

I need to design a source generator for a TV factory. They want to automatize the functional tests by applying a test module to the TV's at the end of the production line. All the peripherals of the ...
Alper91's user avatar
  • 1,313
0 votes
1 answer
115 views

Does the Si4731 / Si47xx provide the necessary info to fetch left/right demodulated audio levels?

I'm working on a project which uses an Si4731 broadcast radio receiver IC (Si47xx family) and which calls for left & right demodulated audio level meters based on a source FM broadcast signal. I ...
Dan's user avatar
  • 137
2 votes
1 answer
2k views

How to empirically tune DQ current PI controllers in BLDC/PMSM motor for vector control?

I need to experimentally set the \$k_p\$ and \$k_i\$ parameters of PI controllers for the DQ-axes of a vector controlled BLDC motor. I have been looking for papers and application notes proposing ...
raggot's user avatar
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2 votes
2 answers
462 views

What kind of component was used in this demodulation circuit?

I was trying to gather components as well as some desoldering experience from an old television tuner when I found those little fellows: They were sitting next to an IC with the Code TDA 6160-2X. ...
Gnarflord's user avatar
2 votes
3 answers
279 views

Multi-tuning AM selector

I'm thinking about the design of an AM receiver frontend that needs to select between three channels. The community suggested that I investigate manually wound loop antennas, and they seem like a nice ...
Reinderien's user avatar
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1 vote
0 answers
127 views

Can antenna VSWR be corrected?

For this antenna, which cites a VSWR of 1.4, can that be improved (decreased) with the use of a matching network? Could the matching network be between the feed cable and the board or must it be ...
Reinderien's user avatar
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2 votes
2 answers
830 views

Separating an FM antenna from a topology which uses headphone ground as antenna

I have a FM radio module with Silicon Labs Si4703 integrated tuner module for Arduino. The module assumes use of headphones and use of ground wire as an antenna (advice is wire length of 1.1-1.45m). ...
SaleB's user avatar
  • 23
0 votes
1 answer
814 views

LC Tank Tuner for Super Regenerative Radio

There seems to be very little literature to explain the practical construction of a radio and how a super regenerative circuit actually act as a selector, amplifier, how a antenna is actually to be ...
Kunal Verma's user avatar
5 votes
4 answers
2k views

Is there a clever way to use a small variable capacitor where a larger capacitance is required?

I am designing an activity where students should band pass a song to find a hidden message at 1000Hz. Problem I have considered using a notch filter and tank circuit, but using the formula $$f=\...
Klik's user avatar
  • 803
-3 votes
1 answer
326 views

How to make a tesla coil play music?

I'm building a Tesla Coil for a science project, and I thought it would be cool if I could make it play music. Could somebody tell me how? I'm new to this so please keep it as simple as possible.
hughjass's user avatar
0 votes
1 answer
885 views

Why am I losing the signal when I attach this RF amp circuit and how can I correct it?

I am trying to follow this circuit diagram: Taken from (http://www.techlib.com/electronics/crystal.html) Using two oscilloscopes I am watching the signal on the tuner circuit and the voltage created ...
Klik's user avatar
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0 votes
2 answers
1k views

Make an RF transmitter: classic transistor oscillator or VCO module?

This question is about pros and cons of making an RF transmitter (eg in the FM band) in the classical way (eg. with a "transistor based" oscillator circuit, like this one which is very classic and ...
Mister D's user avatar
  • 205
1 vote
1 answer
7k views

IF transformer color codes

Is there any standard color code available for IF transformers? Generally in most of the Japanese radio receivers I see red color slug for MW oscillator, white and yellow slugs in AM IF stage, ...
Dilshan Jayakody's user avatar
3 votes
3 answers
11k views

How to properly connect and drive varicap diodes?

can someone explain me how to connect and use varicap diodes? Please consider that I am a novice, so would be ok to use a clear and an exhaustive language/terms. Thank you. I often see these ...
Mister D's user avatar
  • 205
1 vote
0 answers
583 views

Does the rt2832u chip have enough bandwidth for ATSC?

I'd like to upgrade the audio/infotainment module in my 2009 Camry. I see several off the shelf solutions, but they don't have a builtin digital TV tuner and the processor isn't as fast as I'd like. ...
Yale Zhang's user avatar
8 votes
2 answers
507 views

Antenna matching network topology

In tuning an antenna, there are multiple possible topologies that will take it to the middle of the smith chart. Some differences that I can see between them are: Component ESR (losses). Effect of ...
apalopohapa's user avatar
  • 8,529
1 vote
3 answers
235 views

Could transmit/receive turnaround be improved by having a heterodyne receiver switchable between high-side and low-side injection

In some of the small radios I've worked with such as the Nordic Semiconductor 24LE line, there is a significant (100us+) delay between transmitting data and being able to receive a response. By my ...
supercat's user avatar
  • 47k
4 votes
4 answers
4k views

How exactly to track oscillator in superhet receiver

The IF is 490 kHz. I have learnt that the local oscillator and the tuning block before the IF stage must "be aware of each other" or track. So in my case, the tuning of both the circuits should differ ...
Plutonium smuggler's user avatar
1 vote
2 answers
429 views

Tuning the radio receiver

I am trying to understand how exactly to tune the Superhet receiver. In my simulations, I have attached to the initial frequency mixer---> A local oscillator and an AC signal source to model the ...
Plutonium smuggler's user avatar
1 vote
3 answers
1k views

Tuning a radio wave receiver

Variable capacitors are used in tuning many circuits of radios. I read the theory of basic tuning and resonance frequency. What I understand by changing the capacitor we change the resonance frequency ...
user16307's user avatar
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