ebay power supply

[irving2008]

Ahh now that power supply looks familier to me, is it because that communications company i work for uses them to generate the 50v dial tone you hear every day when you pick up the phone (assuming you are not on cable that is, lol)...


Rick

Well its a Mineaba supply for telecoms, c 1995/96... no longer manufactured...

[Ricardoco]

Well its a Mineaba supply for telecoms, c 1995/96... no longer manufactured...

I knew it!! and maybe its not manufactured any more but they are still used, remember this comapany still has bakalite fixtures because they believe "if it aint broke dont fix it because the shareholders need the cash), they do replace them with farnell units when they go bang though....lol

[irving2008]

I knew it!! and maybe its not manufactured any more but they are still used, remember this comapany still has bakalite fixtures because they believe "if it aint broke dont fix it because the shareholders need the cash), they do replace them with farnell units when they go bang though....lol

Dont suppose you'd have any documentation on them?

[Ricardoco]

Im not back at work till next week so i will have a look for you then (if there is i will have to send you some scans) although small there is a chance.. :)



Rick

[GeorgeD]

(if there is i will have to send you some scans) although small there is a chance.. :)

I can see lots of rubbing of hands and faces being lit up here. :heehee:

[ecat]

It's early to bed for me tonight and a long day tomorrow, I'll see what I can do. I've tested a range of voltages BUT I cannot test at anywhere near full load so cannot comment on when the current trip will kick in. What voltage are you looking for?

[hmaki]

Hi,
Irving:
Can you explain me how that schematic works on your first post in this thread?
Also I like to know what is this value on potentiometer.

I want to rise my supply voltage to 57V thats why I asking these questions.

BR

Juha

[GeorgeD]

Juha,doyou know what you're doing? sorry for that but the pot is lablled as 1.5k variable.

[routercnc]

Hi Juha,

I'm not great at electronics, but the usual way to write these things is to put the 'K' in the middle e.g.:
1.5K = 1K5
7.5K =7K5
I suppose this avoids costly mistakes if the small dot '.' is missed. My knowledge ends somewhere there . . .

[GeorgeD]

I can't understand why he doesn't connect the suppy to whatever he wants 57volts for? the supply according to the pics Irving has posted,the first pic is showing the voltage output as 50v to 57.6 peak so it should be adaquate for his needs?