audio-talk

This is what Stephie said about the negative in his example 3rd

“Notice the minus sign. This indicates that the harmonic content subtracts from the fundamental (flattening it) when the fundamental is at its crest. This *usually* happens on third harmonic distortion in tubes.”

In my book the EL34 wins.

Right, its getting surprising. Ive probably given up on repurposed sweep tubes. But now, as the EL34 sounds so great at 2.1 watts Ive drawn up the distortion camparrisons of three valves of which you’d expect the dht’s to win. https://i.postimg.cc/xdNLvBzW/IMG-1236.jpg https://i.postimg.cc/cLBq9F8C/...

Yes Steve Im going off the EL84 aswell. But the EL34 at 2.1 watts is a keeper. Its the winner of this excercise. I see no point building an amp loaded with odd order distortion. I cant go out so I’ll play with other characteristic curves at 2 watts. Its a shame I dont think I can get more than a wat...

So I shifted the EL36 operating point to 2.3 watts and to highest current I could, also pushed dissipation up to 20w limit; the 3rd h distortion speaks for itself. https://i.postimg.cc/152zYVG2/IMG-1237.jpg https://i.postimg.cc/6pZQs6z3/IMG-1238.jpg I don’t see a 300b challenger. This will not be th...

I’m sorry I was struggling with the 3rd harmonic distortion formula, so went back to Stephies teaching on distortion, read it multiple times, added 4th harmonic so I now have a spreadsheet that calculates 2nd 3rd and 4th. Stephie explains the negative figures. They are not a calculation error. I gue...

Ah, so I could claim pension tax credits if I don’t work. I probably will.

I get more than £81 state pension so “you will not get any carers allowance”

So that wont be claimed and as before its better to work.

Yes, thank you? I could have always had it as I registered as her carer 2010 when she first went into a coma and came back not knowing our wedding or honeymoon. . It just suited me to work instead. Yes I’ll get that changed. Probably by phoning the local council as thats where I had to register.

16uF ultrapath cap ordered QTY 2

I’ll consider moving the el34 out of its chassis and fit it into the new smaller chassis. Depending if I can reduce the bypass cap as it would require 6 big poly caps as it stands and Im not using electrolytics, Ive heard better, Im not going backwards. The bypass cap calk for existing cap in the El...

https://i.postimg.cc/L8DyLPnR/IMG-1230.jpg https://i.postimg.cc/CMn6Xd6H/IMG-1231.jpg with a couple of changes, yet to put ultrapath cap value in as need to get all facts and I’ll do the calcs on the bypass cap in the same process. Im sure 330 is excessive. The grid choke speaks for itself. https:/...

Without us having to reapply with the help of an agency. I only know because a backdated sum has hit the bank. I’ll know the monthly amount going forward when a full month goes in. Its a huge relief.

I think Mazda would have been made in Japan. So they ought to be quality.

I get downstairs to find Steve’s four Mazda arrived. Thank you Steve?