New SE With Triode Mode KT120/150

[steve s]

If that's me steve .. well... thanks

I'm glad it's worked out ok... my only suggestion to 'improve' it would be a pair of vt75s (kt66).

[Cressy Snr]

Aye it’s you Steve.

[Paul Barker]

Time - the enemy of so many of us. And enough of the right iron. Would be great to hear it one day.

Have you got a pallet truck ? rofl

[simon]

No. But I've thought one would be rather useful a number of times

[Cressy Snr]

Right,
The finishing touches have been put into both power supplies, after reading and digesting the DHT Rob tutorial on using PSUD.
The input stage has a 50KHz..ish, HF cutoff filter placed immediately before the series resistor feeding the two glow tubes that provide a stabilised 200V for the MH4s
The output stage has the same filter placed at the end of its power supply.

Sims below:

The 3.3uF caps are high quality silver foil/oil jobbies.
It would have been the bees knees I'd had four of the caps, then I could have put a filter next to each valve, but I've made do with one per stereo pair of valves.

It all sounds great; in fact I'm quite bowled over by it. It'll do very nicely thank you.

[ed]

wierdest thing Steve...I just had to reload psud after the rebuild last week and the upgrade to win10..so I thought I'd just make sure it works....and this is what I got copying your PS

wrong image removed

it doesn't match your voltage at all..are you doing something special?

[ed]

my bad...I got the current delay wrong.....looks better now

[Cressy Snr]

The voltage is about the same on mine after the current step. I see a current step on your current sink, but none on the graph.

[Cressy Snr]

However the supply is wrong. Somehow, the resistor has changed to 220R and the cap C2 should be 300uF.

WTF?
I’ll have to put it right.

[ed]

close up after 2.5 secs is a bit up and down though

we have posts overlapping....I've adjusted my plot with the delay corrected.

[Cressy Snr]

And the rectifier is wrong too. RIGHT
I'll put them up again corrected. I may be some time.
Good job you happened to be setting up your own software. I wouldn't have seen it otherwise.

[Cressy Snr]

Correct output stage PSU:

Input Stage:

As you were.

[IslandPink]

I doubt that all of those caps are 2 ohms ESR .. in fact I'm not sure any would be quite that high.

[Cressy Snr]

I doubt that all of those caps are 2 ohms ESR .. in fact I'm not sure any would be quite that high.

That’s the default and basically I couldn’t be arsed to change them.

[pre65]

I doubt that all of those caps are 2 ohms ESR .. in fact I'm not sure any would be quite that high.

That’s the default and I couldn’t be arsed to change them.

That's entirely up to you Steve, but the more accurate the information you give the chart the better it is for the end result.