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 Post subject: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Mon 04, 2017 6:59 pm 
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Joined: Nov Thu 02, 2017 3:07 am
Posts: 23
Location: Montréal, Quebec, Canada
Hello!

I am about to convert an antique tube radio into a mono mini transistor and Raspberry Pi3 to stream my music.

Here my project :

At least 2 outlets power cord extension to plug a power supply (to power the mini amp) and my Pi3.

Rotative power switch to power all the stuff (will be on the front of the radio)

Volume pot for volume adjustement of the mini amp (already have it on the board but I have plans to add it on the front of the radio)

A new 50W RMS 8 inch speaker

My big question is.... regarding the rotative on / off switch, Can I wire it on a single wire of the power cord extension (as a standard on/off power switch)? On the box, it says it's only for lightning application but I know I will not use draw more than 6A. I want to adjust volume and power my unit all in the front of the radio. I don't want to unplug/plug it everytime :)

Anyone already did that in the past (of similar project) ?

Here some screencaptures of my stuff.

Thank you!!

Guy


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 8:18 am 
Member

Joined: Sep Thu 23, 2010 6:37 am
Posts: 9430
Location: Powell River BC Canada
You haven't provided enough information.

Is the old radio case fire proof? What about a grounding
conductor?

On a side note, the rotary light switch does not have an on-off
marking. If the music system wasn't playing, how would you know
it is off ?

_________________
de
VE7ASO VE7ZSO
Amateur Radio Literacy Club. May we help you read better.
Steve Dow
ve7aso@rac.ca


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 8:37 am 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 10972
Location: Mpls, Minnesota
You are going to do what to that radio? gut it and install new components? You probably won't get many replies on this forum. This forum is for the restoration of vintage radios.

Dave


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 1:36 pm 
New Member

Joined: Nov Thu 02, 2017 3:07 am
Posts: 23
Location: Montréal, Quebec, Canada
radiotechnician wrote:
You haven't provided enough information.

Is the old radio case fire proof? What about a grounding
conductor?

On a side note, the rotary light switch does not have an on-off
marking. If the music system wasn't playing, how would you know
it is off ?

There is no ground in my setup.

On the mini amp, I only need to connect two wire from a power supply (kind of laptop power supply).

See screencapture of what I will use as mini amp (TDA2050).

The raspberry Pi will have a indicator light when it's powered on. I will add a no momentary button on the side (there already a drilled hole on the side) to poweroff the Pi and the light will be off. After that, I can securely power off all the stuff using the rotary pot but yeah I don't have a LED for the mini amp. In worst case if I power on the stuff by accident (turn the pot 2 times), the light of the Pi will lit because it will run automaticaly when it receive power.

I already checked for a pots with switch but I can't have a 10k pot / 125V 6A switch.


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 1:36 pm 
New Member

Joined: Nov Thu 02, 2017 3:07 am
Posts: 23
Location: Montréal, Quebec, Canada
Had internet issue on my side. Sorry for double quote.


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 1:46 pm 
New Member

Joined: Nov Thu 02, 2017 3:07 am
Posts: 23
Location: Montréal, Quebec, Canada
easyrider8 wrote:
You are going to do what to that radio? gut it and install new components? You probably won't get many replies on this forum. This forum is for the restoration of vintage radios.

Dave

Hi Dave,

Yeah I was wondered about that. I just give it a try to see if someone here already did that kind of project.

The original tube amp has been disassemble from the original owner (like more than 50 years ago). He installed a transistor radio and drilled an hole on the side to change radio frequency (was a rotary knob). I read on the net I can install a modern mini transistor amp (and all the stuff to make it working) to make it as a modern juke box. I have limited electricity skills so it's why I asked this question here !


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 7:56 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 17981
Location: Warner Robins, GA
Oh ok so it was already butchered when you got it.


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 8:36 pm 
New Member

Joined: Nov Thu 02, 2017 3:07 am
Posts: 23
Location: Montréal, Quebec, Canada
Tube Radio wrote:
Oh ok so it was already butchered when you got it.

Yeah :(

I was sure all was original. When I checked on the back, there was the original tube amplifier, an other Fleetwood AM tube amplifier (top shape condition but not working) and the transistor FM radio. I heard this radio had a bad life in the past!! It was in a garage... humidity.... temperature (winter)... etc.

It's why I am doing all these things : give him a second life !!


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 Post subject: Re: Lyric / Mohawk antique radio - New electricity component
PostPosted: Dec Tue 05, 2017 10:22 pm 
Member

Joined: Sep Thu 23, 2010 6:37 am
Posts: 9430
Location: Powell River BC Canada
You said that you have limited electricity skills.

For this reason, wiring up anything that you are going to plug into a wall socket
should not be done by yourself, because you will not know what hazards your are
creating, that might cause fire or electrical shocks.

Connecting anything on the the mini amp, speaker, or Raspberry, at the lower voltage,
from the power supply is less dangerous, and it is reasonable to do for most people.

So find someone, who is knowledgeable with 120 volt wiring, to oversee, or do the other part.

_________________
de
VE7ASO VE7ZSO
Amateur Radio Literacy Club. May we help you read better.
Steve Dow
ve7aso@rac.ca


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