Thanks for nay or yay sayers, your opinions are much appreciated.
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
no
too old
I guess thats too brief.
![Roll Eyes ::)](https://www.eevblog.com/forum/Smileys/default/rolleyes.gif.pagespeed.ce.XcUK202Yqt.gif)
The 6114A AND 6115A specs are extremely good. try finding a modern supply this quiet or stable for less than several thousand dollars. No current power supply by Agilent comes close until you spend over $5000.00 from what I have been able to find. The Power Designs Precision supplies are also in this category.
$100.00 guaranteed working I think is a good deal.
Yep, "mainly" this is your fault, especially after seeing your adventure with that fine 6114A of yours.
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
I'm aware that it's accuracy might be drifted, but this can be calibrated. My main interest is the voltage range 0-
100 Volt and the "stability factor", totally agree with your assessment, this beast definitely not an average adjustable lab psu performance at the price of $100.
Hi,
You can read about the HP6114A which is very similar to the HP6115A in the HP Journal.
The only downside to these supplies is the way the output voltage is controlled:
The use a constant current source into a decade resistor. If the switches are dirty the output voltage will jump.
There is an overvoltage crowbar (SCR) that can be used to protect your load.
The decade resistor contains some close tolerance resistors.
Jay_Diddy_B
Thanks for the link, yes, I'm aware of the mechanical switch weakness, but after reading Robrenz's work on his 6114A, I'm convinced, although I doubt my self to have the same level of skill in restoring old instruments as he did.
![Cry :'(](https://www.eevblog.com/forum/Smileys/default/xcry.gif.pagespeed.ic.tehjCtKixU.png)
How do you expect people to answer if you don't say what country you are in? In the US you can get a better deal.
Nope, don't have the luxury of ebay-ing used T&M instruments from US, the cheapest shipping cost it self from US might be > $300.
![Cry :'(](https://www.eevblog.com/forum/Smileys/default/xcry.gif.pagespeed.ic.tehjCtKixU.png)
You also don't mention if it has the 10-turn Current Pot
The problem I have is the seller still can not find it in their warehouse.
Will this 10 turns pot matter much ? Any chance of modding it my self ? What value of this current pot ?
I still like this supply. I would buy it if shipping wasn't a problem. Robrenz is right on the money. The specs are great, the resolution is good, the price... it always seems to be great. Please don't advertise this model around guys! And for god's sake don't let Dave make a video! Look what happened to the rubidium standards, they doubled the price since the video!
Nope, I will personally pick it up at the seller's warehouse.
Again, just to repeat, I will have the chance to inspect and test it physically, isn't this factor it self worth some pennies compared to online purchase ?
Quoted some of it's spec :
Constant voltage spec :
Load regulation : 0.0005% + 50uV
Line regulation : 0.0005% + 100uV
Ripple & noise : 40 uVrms/100uV p-p
Temp Co : 0.001% + 15uV
Drift (over 8 hours under load) : 0.0015% + 15uV
Transient recovery time : < 50uSec with 10mV of nominal output
Output impedance : 0.05 mOhm in series 3 uH inductor
Output voltage accuracy : 0.025% + 1mV
Constant current spec :
Load regulation : 0.01% + 500uA
Line regulation : 0.005% + 20uA
Ripple & noise : 200uA rms/1mA p-p
Temp Co : 0.02% + 25uA
Drift (over 8 hours under load) : 0.25% + 4mA