speaking of linear (and analog) power supplies...

mhardy6647

Señor Member
I went to NEAR-Fest (Home - NEAR-Fest.com ) last weekend with a mission. My mission (which I chose to accept ;) ) -- to find a decent-quality, fairly robust DC linear power supply, ideally a cheap one.

Well... there was no dearth of power supplies of all shapes and sizes. One vendor had a whole stack of very decent looking ex-lab DC power supplies at what looked like reasonable prices. One slightly homely example caught my eyes. Dual, variable 24 VDC supplies @ 2.5 amps. A little less oompf than I was hoping for, but the price made up for that -- 15 smackers.

The guy who sold it to me said it worked fine -- the only issue was that the mounting bezels for the two meters were... well... not present. I figured a little double-stick tape could provide a simple if not terribly elegant solution... so home with me it came.

Finally got 'round to smoke testing it today. It definitely works -- next step, of course, take a look at the output on a 'scope (or just hook something to it and see how quiet it is -- or isn't).

To paraphrase Crocodile Dundee

That's not a power supply.

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This is a power supply.
DSC_4595 (2) by Mark Hardy, on Flickr

🤭
 

fiddlefye

Senior Member
I went to NEAR-Fest (Home - NEAR-Fest.com ) last weekend with a mission. My mission (which I chose to accept ;) ) -- to find a decent-quality, fairly robust DC linear power supply, ideally a cheap one.

Well... there was no dearth of power supplies of all shapes and sizes. One vendor had a whole stack of very decent looking ex-lab DC power supplies at what looked like reasonable prices. One slightly homely example caught my eyes. Dual, variable 24 VDC supplies @ 2.5 amps. A little less oompf than I was hoping for, but the price made up for that -- 15 smackers.

The guy who sold it to me said it worked fine -- the only issue was that the mounting bezels for the two meters were... well... not present. I figured a little double-stick tape could provide a simple if not terribly elegant solution... so home with me it came.

Finally got 'round to smoke testing it today. It definitely works -- next step, of course, take a look at the output on a 'scope (or just hook something to it and see how quiet it is -- or isn't).

To paraphrase Crocodile Dundee




View attachment 13248



DSC_4595 (2) by Mark Hardy, on Flickr

🤭
No kidding...
 

mhardy6647

Señor Member
That is a custom crafted amp stand, too, buddy!

:)

I've been thinking about installing an audiophile fuse in that EV Game P/S -- whaddya think?
 

Prime Minister

Site Owner
Staff member
I went to NEAR-Fest (Home - NEAR-Fest.com ) last weekend with a mission. My mission (which I chose to accept ;) ) -- to find a decent-quality, fairly robust DC linear power supply, ideally a cheap one.

Well... there was no dearth of power supplies of all shapes and sizes. One vendor had a whole stack of very decent looking ex-lab DC power supplies at what looked like reasonable prices. One slightly homely example caught my eyes. Dual, variable 24 VDC supplies @ 2.5 amps. A little less oompf than I was hoping for, but the price made up for that -- 15 smackers.

The guy who sold it to me said it worked fine -- the only issue was that the mounting bezels for the two meters were... well... not present. I figured a little double-stick tape could provide a simple if not terribly elegant solution... so home with me it came.

Finally got 'round to smoke testing it today. It definitely works -- next step, of course, take a look at the output on a 'scope (or just hook something to it and see how quiet it is -- or isn't).

To paraphrase Crocodile Dundee




View attachment 13248



DSC_4595 (2) by Mark Hardy, on Flickr

🤭
As an aside, the Lounge doesn't benefit from an upgraded power supply, as it had a linear one built in.

Just in case that was among your planned experiments.
 

mhardy6647

Señor Member
As an aside, the Lounge doesn't benefit from an upgraded power supply, as it had a linear one built in.

Just in case that was among your planned experiments.
I actually remembered that, sir!
But I appreciate the reminder.

Actually, there's this thing that I acquired a couple of weeks ago (barely worth describing, at least at this point) that needs power -- but it, too, is looking for 12VAC.

I do have 12VAC available on a Heathkit IP-17 HV DC P/S, come to think of it...
The nice folks at Heathkit provided 6.3/12.6 VAC on the front panel to power filaments.

:)


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borrowed image
 
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