https://batteryhookup.com/ Should get you going.

Yeup. Im stupid. When you put it in terms of the data stream it makes perfect sense why differential is not a thing. I should have known that too. The first part though is something new. I'm not familiar with dynamic element matching. This might be where Im getting lost and how 10 elements...

Thank you for the response. I have watched that video serval times. I get that one edge is always canceled by just 1 other edge. I even understand how choosing the number of elements is related to the resolution of the PWM signal. Where I lose the plot is when we look at each element...

The one thing I still don't quite understand is pulse array. I get that you have a number of elements that have all been slightly time shifted such that 2 elements will cancel for any given edge of data, but I don't quite understand how this works. In my mind, this means you have 10 slightly...

I know this is a late reply. While you do need reinforcement, it is actually a pretty small problem to solve. The big problem is actually finding the mesh or going through the process to electroplate it yourself.

You are going to have to learn about electronics to some degree in order to properly design a set of speakers. Most speakers require a crossover which means you will be doing a little bit of circuit design. Start with learning how to build power supplies. Everything you will build will need a...

You really want to be using a resistor divider instead of a simple inline resistor. This page here goes into detail about what values you should use between your headphones and amplifier of choice. https://robrobinette.com/HeadphoneResistorNetworkCalculator.htm

It's not impossible to build a 300b amp for under 1K. You will have to put in more work, but it is doable. Antek and edcor are your friend. Doing some rough math here I am coming up with 400 bucks for your power transformer, choke, output transformers, and filament transformers. You can find...

It's gonna be tricky to keep it under 1K, but there are designs out there that will work. Here is a solid design that can get you started. https://audioroundtable.com/forum/index.php?t=msg&th=5883&start=0&

You could just use a dummy resistor and a multimeter and get a close approximation for cheap. But why are you doing this and what do you want to achieve? Are you having a problem with an amplifier?

Mkay

Lol. K.

Have you confirmed you even need to switch the winding outputs? I would have to sit down and do the math to figure out what sort of gain loss you have through your output tube, but your 6sl7 has a gain of 70. Let's play devil's advocate and say you get a total system gain of 50. With 2.83v of...

Be very careful with monolith. They do make some decent stuff, but you have to be very judicious and read the spec sheet carefully. For instance, their low end 300b transformer actually has more primary impedance than their higher end transformers. If you want a 300b transformer, look at AE...

Maybe I am confused or something, but what part of what I said makes you think I wouldn't agree that film caps are better than electrolytic. All I said was to not waste his money on mundorfs and suggested that he take a look at temco caps.

I have tried several mundorf caps in several projects and none of them sound good. You should take a look at temco motor run caps. They are oil filled film caps that sound better than a lot of name brand caps. With the money you save, you could get a second 1uf cap to put in parallel with...

Just to clarify, did he switch back to probias because he liked the sound better or because it was easier to live with the pro bias?

The 71 and 71a would be the only other tube I know of that can be used as an output tube with a 4 pin base that meet those heater requirements. IDK how specific we are really trying to be here. For instance an 01a has a 5v heater, but you can only really use it as a preamp tube without...

Out of curiosity, has anyone tried to go for a relatively loose tension on the mylar? Im thinking about using water tension to stretch the mylar flat and use fairly thick spacers (1-2mm) to avoid stator slap. Obviously this would require very high bias voltage, but so long as I manage to keep...

Since you are in the UK, you should probably reach out to sowter and get some quotes on custom transformers.

What sort of bias voltage do you wish to achieve?

You either have a fixed load or you don't. Short of running an SEPP stage into a power output tube/mosfet or using planar headphones, you are pretty much SOL. Part of the reason SEPP does NOT make for a good OTL output stage is because most (if not all) high impedance headphones have a highly...

Yeup. But I have heard tons of lampizator dacs, and I have never been all that impressed with them. I would fully expect your dac to sound better.

Hmmmm. I kinda see what you are getting at. If that is the case, I would recommend lithium iron phosphate batteries since they are much easier/more forgiving to charge and cycle. I would simply buy enough batteries to give the dac a 2 day run time and charge the dac up at night. Running the...

Why are you guys using super capacitors for this? Isn't the dac internally regulated? If so, the last regulator in the chain WILL be noisier than a decent quality lithium ion battery.