Mr Carlson's Lab patreon

AA5 Bluetooth SMPS Verification!

🕑 Added 2025-02-03 15:11:31 +0000 UTC

Comments

Bryan R Rouse

Would a 6v 800mA supply be enough to feed the 5v regulator on the AA5 Bluetooth board?

Billy Sharp

This place is so cool!

Gary Cook

They look like the Delinx AC DC Converter Modules sold in pairs.

Helmut Heller

I used a linear supply like this as a BFO supply (transistorized) in my tube radio to get a clean 5V supply. Now I hear the bridge rectifier diodes switching on shortwave. Sigh. I didn't put little capacitors across these diodes yet. Next time I open that radio I will add them.

Helmut Heller

Snow storm! Power outage! But MCL is going strong :-) WOW!

hadi

Before buying LED lamps, I always try them near a pocket am radio, the folks at store have no idea what I'm doing 😅 noone listen to AM in this part of the world. (Morocco) Nice you kept the footage with the power outage 👍😜 TY

Clint Allsopp

Thank You for all your hard work, time and your videos Mr Paul. I was dying laughing and out came the flashlight..that was awesome! Thanks for keeping it real with us. I always count the line recloser clicks too. 3 strikes and you’re out!

Boo LuQuette

James , I had a meanwell type smps and had the same noise issue ... I got rid of it and got a Dell server smps 12.9 volts and 75 amps ..... Just as clean as a whistle , no noise .... I do know 15 volts makes for a hotter radio , but I don't need a couple extra watts from my radio.... HP server supply's are also quiet ....

David Kuhn

$9 on mouser

David Kuhn

https://www.ebay.com/itm/152569815817 Not very big, PC Mount, and can be had for cheaper. 100ma at most but isn't that good enough for a bluetooth receiver?

Mr Carlson's Lab

You would probably have to shift the switching frequency, or outboard RF chokes from the supply in a shielded can, (wires from the supply would need shielding as well.) Linear supplies are the only way to go when space is not a concern.

James e adams

i have meanwell 15v 66 amp i'm running my ham radio off of . i'm getting noise in the radio . i put Type 43 Ferrite on hot an ground wires and 103 caps to help but it's still noise .. any help ?

Mr Carlson's Lab

Thats getting pretty big already, 6V AC, 60Hz transformer, (big core) a bridge rectifier, and a say... a 2200uF cap.

David McAnulty

Biggest problem with PC playback is you can't stretch the window. I've been using Picture-in-Picture mode to get it the size I want. I miss Youtube :(

Karl H. Peterson

Hi! Thanks for good video. To me this video serves as a reminder how involved the process of choosing a component for a design is. Those PSU's, I've never found one that I'm happy with for permanent solution and typically end up rolling my own. Either they are too inefficient, too bulky, too noisy, too unstable or the noise is in the wrong band, or whatever else. These days we have an excellent choice of smps regulator chips that really simplify the design and allow building PSU's to our own specs. I always thought that it's because I have too many constraints, but no. This Christmas I wanted to run tree-lights at 3mA@26V from a boat battery for 2 months. I thoght that finally, a good usecase for those blocks. I bought 5 different adjustable blocks only to find that the best efficiency was a meagre 20%. That's not really a complicated set of req's...

TWISTED1

I think we all understand why we seen the generator video :) . I want to say I really enjoyed the BC-348 series and appreciate all the time you put forth in teaching us, and entertaining us all. 😃

Chris

Thanks for all your had work, Mr C. Looking forward to your results

Reid Braswell

Maybe you could put an camera on the mast of the 3-6-9 antenna to watch the weather when one of these storms disrupts power.

Reid Braswell

Would love to see an AM modulator the size of one of those power supplies that would modulate the AF output of the blue tooth device at the IF frequency with a simple gimmick coupled into the IF chain.

Pete Bronlund

That's interesting. I have an old Sony android Tablet and it often won't play a Patreon video but it lets me link to YouTube & its okay there. Paul's videos no longer link to YouTube so i use my PC to see his Patreons.

Tom Harris

Time to fire up the genset! I am also thinking an analogue supply with a tiny filament transformer. The other thing is , what AA5 radio is even worth Bluetooth??

Svein Arne Netteland

Nice video. Really interesting to see how you can make these power suppplies silent for radio operation. Appreciated the «live» feel to the video with power outages. What about a linear power supply? Transformer being too bulky?

David Kuhn

little 6vac transformer, bridge rect, couple caps, and a 7805?

Beaky Twitch

My first thought was that switchers and AM radios could never get along together. But that prejudice is being tested by you, which makes for a very interesting vid. Thank you! You did not mention ferrite noise suppressors on line input and supply output, but you did put the whole switcher into a repurposed dud capacitor to limit EM noise from the pulse transformer. You are also disabling the radio IF when using a BT receiver, and you showed that a BT receiver is not bothered by switcher noise.. A fun investigation indeed !

Albrecht Dim Bulb

You should consider a new segment in these videos called "Electronics by Candlelight".

Kiara Cay Brandt

When i click On my samsung note 10+ on the Large black video title nothing happens . It does not matter which Patreon video which Patreon video!

D

Amateur repair time mentioned Mr Carlson in his latest video and had a interesting question about if you still need to go buy tubes that you dont have on hand this is the https://youtu.be/_KvYwzOfNfw?si=-s4kG62voT0Bj_QX