Hello. For the coupling capacitor calculation, shouldn't be considered the output impedance of the driver stage, besides the leak resistor..? thanks!

Howdy. Great. Looking at the spec.s I observe the 12AY7 is more linear than 12AX7, though less raw gain. This is pretty much what I have been looking for. I should think it is more stable than 12AX7 with strong neg. feedback. Regards.

Excited to get my Shuggies and get my 300b Amp going!

Thanks for the class, the world needs more people like you. Greetings.

Kegger, what a nice fellow. Learnt a lot from him. RIP

Skunkie, This DAC Amp Head Amp does not have an Amp or feedback loops hence it does not have A, AB, D etc. Amp classes, it is claimed to be a top notch quality sound reproducer, using a headphone adapter it can drive headphones too. Can you do a review of it? It would be of great help to Audiophile comunity as well as to the advancement of the indistry. Thanks. www.audiophile-heaven.com/2024/07/ecdesigns-powerdac-sx-stereo-hifi-dac-amplifier-ultimate-levels-of-power-and-control.html

I am up and running! Needed the .25A slow blow. Ran into a dead channel but think it was a cold solder joint on one of the terminals. I'm using tungsols 12ax7s and this is a night and day upgrade from my bellari vp130. I'm officially all pure tube. Sounds insane. If it takes a half hour to sound good Im in for a real treat. Curious even once these tubes break in. Thank you again for these videos and your support building! The chassis work which i was fearful about was honestly really easy with the tools u recommended. Could probably build one now with my eyes closed. Thanks Stephe!

Impressive mechanics. What was it intended for?

Thank You for that great explanation. Cheers!

cool yall have fun

Very interesting video. Is important to note that you are comparing 3.5R primary impedance of the Tango vs the 5K of the Edcor. May be comparing vs the model FC-20S? Love your videos btw.

He he the nosy dog in the background

This would be around the price of a AXA35. Curious what would fit me better.

I once put a BIOS chip in backwards. You guys can take "fry" quite literally.

Hi Stephe! Great video. Thank you for digging into this amp. The qualitative reviews seem great but the quantitative tells a different story. On the verge of pulling the trigger on getting one. Does anyone know if Willsenton is still putting the delay boards in them?

Howdy. The neg. feedback by the resistor between the anodes is interesting. I would assume good results have been observed. That is, however, not how I would do. I would use the resistor summing principle. The way done here I would say is a transconductance modulation of the input triode by modulating its anode voltage. Best Regards.

It's got some nice rhythms … boom-ba-choon-ting, klack-di-klinki, boom-ba-choon-ting …

Oh Jesus the pinch hazards. Can you even call it a pinch hazard. More of a chop your arm clean off hazard. One of those machines that you CANNOT allow yourself to get comfortable being near

Hello! The black pre amp in the middle, this is a phono pre amp? Mm? Im Looking for this size that's both mm/mc with volume control. Is this unit for sale? If so, will the seller install a sut for mc? I'm very interested. Iv tried to find a original ear 834p- can't seem to find one. There are fakes I. Worried about buying. Thanks.

This could be an ASMR video 🙂 I have been enjoying your holiday snaps and videos over on FB.

From back when safety was of absolutely no concern to industrialists.

Incedible machine! Was it used to drive a generator, or pump?

Wow! This is amazing engineering. Kudos to the designers and manufacturers

I see your train of thought here ,first you have to design and build a machine like this so that you can design and manufacture tubes for our high end audio systems. Keep im coming.

Very cool! I hadn’t seen an engine like this before. This is a video of the first start. kzbin.info/www/bejne/mpnTqJV4rLh8d9Usi=9wyBCytefEnsJBww

And Stephie wondering how to hook up a super quiet high voltage dc generator for her next build!

Very cool!

Uuh, never saw and heard of such engines! Impressed me, shame on me... 140 tons!? Much thanks to Stephe for the excursion. Urged me to read more on this device and this museum.

A thing of beauty, a joy for ever and sounds about great! A magnificent piece of mechanical engineering.

What! No tubes?

Well I just got the A10 I put Mullard EL34's in and a JJ recto tube in it rocks I wasnt excepting to be very loud it can keep up with my drums! those are 130 db's I was using a Ampapa tube preamp going into my Sony receiver and now have my Sony sub hookup to one channel and works great. I own 7 tube guitar amps. Also can use the blue tooth from my Sony into the AUX. I got the handwired one with a Amazon credit for 200.00 :)

It doesn't get much more steampunk than that, lol. Isn't it amazing what they were able to design and build long before the invention of the computer, CAD and CNC.

Where are the thermionic valves?

Howdy. Credits to Skunkie Designs for a comprehensive description. The time spent and effort made tell about true passion. Best Regards.

Can't wait to see the prices of those horizons in Europe.

Hey you're a lot of fun as a reviewer and I'm probably the 10,000th person to say this but it really is refreshing to see a woman enjoying the hobby. First time viewer. So, there are a couple of things about subwoofers that I don't want to mansplain too badly about, but there's some indication that your experiences might be enhanced if you make a couple of adjustments: (I'll insert a line break so you can just cruise right on by this comment if you want. Hah,.) First, you said, "I like to have my subwoofer in the general vicinity of my speakers so that the sound is coming from roughly the same place." If you can tell that there is sound coming from your subwoofer, specifically -- meaning, if you can point to it with your eyes closed -- then your low pass is set too high. You should never be able to locate the sound coming from your subwoofer, regardless of where it is in the room. Subwoofers are meant to be sensed more than heard. Second, you said that your main system got muddy when you added the Elac but that says to me that you're not splitting the signal -- which in a system with its own low-end capabilities, is a must. The main benefit of a subwoofer is *not* the subwoofer itself, it's that the main amplifier doesn't have to thumb-wrestle with the main speakers to make the low frequencies. If you're not splitting the signal before it gets to the main speakers (and there are several ways to do this, some of which are cheap and cheerful and others of which are ... not), then you're losing most of the benefit of having a subwoofer. This explains why the Elac sounded so much better in the second system: Neither the second system's amp, nor the second system's speakers, were trying to produce those frequencies to begin with. Anyhoo, bravo for being willing to put yourself out here in the not-always-very-nice KZbin universe. I'm going to have a long browse on your channel now and probably binge a few more vids. :-)

I support you in your endeavors for the truth in advertising Hi Fi products. What happened to the original law and specifications that existed years ago! Whe. There was IHF and RMS ratings. I’d like to see ratings on distortion in loudspeakers.

I'm planning to use both. Solid state for watching Movies, YT and such and tubes for listening to music. Just to protect the tubes and also my electrical bill. :)

Nice video

Fantastic video. This is a subject I have wondered about. Might it have been a good idea to perform the subjective listening test first ? The results of the objective test will be the same regardless. But the subjective test could possibly be influenced by knowledge of the objective test. In any case great work🤠

Du you have experience with the PSVANE BT KT88-Z? And if so are they comparable to the Shuguangs?

This is a great video Stephe. It was brave and smart of you to make the changes

I have fallen in love with this A70, in the vocal performance is really impeccable, when I play my symphony the moment, has been conquered by him

Very good explanation... I have a Mc240 with 6L6 power tubes and I would like to try some KT66 as you mentioned they aren't cheap? So any help in narrowing it down is most helpful.

Love your videos. I'm thinking of buying this amplifier, just on your knowledge. Keep up the good work. I would rather buy your thousand dollar kit. How long should it take on average to build your kit amplifier? I'll adjust a few hours up or down from your estimate, lol

Just bought a quad of new Psvane 300b Horizon tubes after watching your review. Just started breaking them in. Hope your observations were accurate. Not to worry, they sound pretty already. Replacing older JJ 300b's. I'll comment more after I've had a good listen over the next month.

Did the manufacturer use these changes after you send it back, so if i buy one it's the same as the one you was changing ?? sorry for my english

Someone had a hangover attaching those getters on the production line.

When will the video update come out ??

Stephe, what are your favourite current porduction EL34s? Thanks!