audio-talk

Anti emitic and very expensive when I was a nurse. Only given then to people on chemo.

Well the formula we have to accept right or wrong. But measuring errors could be mine. If the printer the artist the actual taking of measurements were right. It would be better to have a table of numbers and process those through the formula. But just as I have nothing to go on but a visual drawing...

Just what the maths came to. Its better now Ive made it fine lines so no judgement as to where the measurement within a thick line. Looks better result. Quite pleased with that valve.

The line is 3 I could minimise it to 1 for most accurate I could achieve when Im home again. The line at 3 is not an easy acurate target. It would be worth doing worst case scenario outer edge to outer edge, then opposite in to in. See what occurs.

The tube above 801a was a bit of a good condenter. But thumbing the Vade Mecum for similar powered triode connected multigrids I found a sleeper. Found them available from the east https://i.postimg.cc/8zDwyQZh/IMG-1271.jpg https://i.postimg.cc/sxhKLVFJ/IMG-1272.jpg https://i.postimg.cc/pXj1GBRt/IMG...

I’ve sent the email to order the uTracer 6 (1,000v) and the extra board for +100v grid bias and associated current measurement.

Good spot Max. Thank you.

Ok, I had to get more b+ so I got the blue bariac. Tuned up anode and g2 voltage to 400v which is max for both. With both at 400v the bias is 25v 35mA so dissipation is 15 watts which is conservative as max combined is 25watts. Estimate power between 1/4 3.7 W to 1/3rd 4.9 watts. Cant hear distortio...

Ive two more nos both sellers only had one. One is Langrex the other isnt a person known. Going rate it 35 plus carriage. Worth every penny. You can get used tested for 20 +.

Just had to try it same pinout as EL34. https://i.postimg.cc/k4zXVx8G/IMG-1267.jpg https://i.postimg.cc/Vkgf9yM3/IMG-1268.jpg I took a look at has a lovely bright cathode, beautiful to behold. Looked at the EL37 data. I dont think its the same. My b+ is 275v its dissipating 7 watts the 620 ohm rk is...

Thanks for the remider. Finding the EL36, it confirmed my view it is a dead duck. Disgracefull distortiin. Shame it doesnt have 10Y or 801a. Good that GM70 at full power is as good as it measured for me. But also the 211 holds its own, and considering there is more reasons not portrayed in any chara...

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I can suure you operating my EL34 SE where its second is better than any dht has prevented me leaving the room, its addictive. The biggest improvement fixing the 2nd harmonic elephant in the room. Thats why Im not wasting time on the EL36. Sorry to report. Its a dead loss not using the valves the be...

How brave are you ? Would you take a stereo pair of ST 45’s and get this power into 10kohm https://i.postimg.cc/K8HD0Yq7/IMG-9258.png You stay at 10 watts dissipation but you risk the voltage tolerance 380v 25mA -90 bias quiescent I have enough ST 45’s to give that a go. Bet it squashes any boitique...

Who can hear the difference between 2 watt and 1.44 watt, but maybe reducing 2nd from 7% to half is the biggest improvement you could make. Forget boutique components, this is measurable science. This is what the different loadlines look like. Getting better all the time. Biggest improvement you cou...