If you cut off a few of the pins (in some cases you need to cut off all) on the
top you can remove the top mica sheet and look down into the tube. Sometimes
they flattened the pins or welded small pieces of flat wire to them on the top
so then you’ll have to cut off all to be able to lift the
That's an impressive bench! (both of you) The Heathkit 2.5 digit MM is
funny to watch as the sample rate is very slow.
~
*mcvei...@gmail.com *
On Tue, Apr 21, 2020 at 1:34 PM Nicholas Stock wrote:
> Ha! You're clearly crazier than I am :)
>
> On Tue, Apr 21, 2020 at 1:29 PM Mark
The 4mA minimum load is livable; even at 300V it's only 1.2 watts. It's
probably required for safety reasons so that you dont have an open
unregulated output. In fact, a lot of switchmode supplies require a minimum
load, otherwise the output goes to zero volts.
Please be VERY careful with this
Ha! You're clearly crazier than I am :)
On Tue, Apr 21, 2020 at 1:29 PM Mark Moulding wrote:
> And here's my madness:
>>
>>
>
> HP 1602A logic analyzer
> HP 8903B audio analyzer (measures distortion down to .01%)
> Heathkit IP-2717 power supply 0-400V
> HP 400E AC voltmeter
> HP 466A AC
Il Mar 21 Apr 2020, 21:30 jb-electronics ha
scritto:
> Thanks for sharing! Does it have built-in current limiting? 400mA is quite
> deadly at these voltages...
>
According to the manual it shuts down if it senses a change in load
resistance. I haven't tried it on my unit and haven't found
Yep, an IP-17didn't need to do anything to mine fortunatelyvery
useful for some projects!
On Tue, Apr 21, 2020 at 12:34 PM Mark Moulding wrote:
> Dig that Heathkit power supply (IP-17? or IP-2717?) at the lower right!
> I have one also, and it's a great unit - 0-400 VDC,
Dig that Heathkit power supply (IP-17? or IP-2717?) at the lower right! I
have one also, and it's a great unit - 0-400 VDC, well-regulated, at 100
mA, plus bias and filament supplies, all done using vacuum tubes. There's
nothing like it available now at any price that I could find. No need,
Thanks for sharing! Does it have built-in current limiting? 400mA is
quite deadly at these voltages...
Jens
On 2020-04-21 1:00 p.m., Paolo Cravero wrote:
Hello.
I got the idea on this group and now it is time to revamp it.
Electrophoresis power supplies generate DC well above Nixie needs
