Cheapest way to drop 48v!

Everything technical about radio can be discussed here, whether it's transmitting or receiving. Guides, charts, diagrams, etc. are all welcome.
User avatar
sinus trouble
proppa neck!
proppa neck!
Posts: 1410
Joined: Fri Aug 22, 2014 11:34 pm

Re: Cheapest way to drop 48v!

Post by sinus trouble » Tue Feb 09, 2021 11:49 pm

teckniqs wrote: Tue Feb 09, 2021 9:31 am Cheers for clearing that up Sinus, I didn't know you could do that.

....But I still think that it's not the cheapest way to do it and looks like it will cost more to build than buying one of those ready made 99p eBay jobs (they work fine!).
Completely agree! Cant get cheaper than 99p! :lol:
I am as stupid as I look! :|

User avatar
rigmo
tower block dreamin
tower block dreamin
Posts: 459
Joined: Wed Jan 30, 2019 9:35 pm

Re: Cheapest way to drop 48v!

Post by rigmo » Sat Feb 13, 2021 10:32 pm

http://www.n4ga.com/50v-to-14v-regulator/

LM317HV ACTIVE 1.5 A or more currents over a 1.25-V to 57-V output
Vin(Max)(V): 60

XXL
proppa neck!
proppa neck!
Posts: 537
Joined: Mon Sep 02, 2019 11:06 am

Re: Cheapest way to drop 48v!

Post by XXL » Sun Feb 14, 2021 2:51 pm

Dunno where people are finding 48v to 12-15v converters for 99p. They’re all at least £2.99

User avatar
teckniqs
proppa neck!
proppa neck!
Posts: 3176
Joined: Thu Aug 21, 2014 11:37 am

Re: Cheapest way to drop 48v!

Post by teckniqs » Sun Feb 14, 2021 5:55 pm

XXL wrote: Sun Feb 14, 2021 2:51 pm Dunno where people are finding 48v to 12-15v converters for 99p. They’re all at least £2.99
I bought one about a year ago and it was about £1.13 delivered, it was an extra 14p more than the other one as it has a little digital LED display on it to show the input and output voltage but the same one without the voltage read out was 99p.

....From the UK they were about twice the price though, try looking at the ones from China.

XXL
proppa neck!
proppa neck!
Posts: 537
Joined: Mon Sep 02, 2019 11:06 am

Re: Cheapest way to drop 48v!

Post by XXL » Sun Feb 14, 2021 7:15 pm

Do the super cheap ones make an noise on the driver board ? Any major noise anyway. I’m not bothered about a slight buzz that you can only hear at max volume.

User avatar
teckniqs
proppa neck!
proppa neck!
Posts: 3176
Joined: Thu Aug 21, 2014 11:37 am

Re: Cheapest way to drop 48v!

Post by teckniqs » Mon Feb 15, 2021 6:45 am

Didn't for me.

User avatar
rigmo
tower block dreamin
tower block dreamin
Posts: 459
Joined: Wed Jan 30, 2019 9:35 pm

Re: Cheapest way to drop 48v!

Post by rigmo » Wed Mar 31, 2021 11:18 pm


User avatar
rigmo
tower block dreamin
tower block dreamin
Posts: 459
Joined: Wed Jan 30, 2019 9:35 pm

Re: Cheapest way to drop 48v!

Post by rigmo » Wed Mar 31, 2021 11:19 pm

But we can use in paralle LM317HV... mosfet...


You do not have the required permissions to view the files attached to this post.

Post Reply