Yes they are. Aren't they beautiful ... but imagine the inrush current when they power up.@ V FETish
Your 75V "cans" looks perfect for use with powerful Tokin's
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I would imagine it would behave very well provided the output voltage swing is going to be enough for you... in other words it depends how efficient your speakers are as to whether it will play loud enough.
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Yes they are. Aren't they beautiful ... but imagine the inrush current when they power up.
Just a bit less than the inrush to the 210,000uF cans in my big Alelph-X amps
Each of these mono amps has a cool half a Farad in the power supply. When I first powered one of them up, my wife asked if it was me that made the lights in the room dim...
I have to guess it'd be fine. But, if I had (somewhat sensitive) 16 Ohm speakers and wanted that lush, single ended, Class A juiciness, I'd probably be looking at SETs. It seems that tubes tend to handle the higher impedance (and voltage swings) just a bit more effortlessly. YMMV
This makes me wonder:
Can the diyAudio store beautiful chassis handle much more power?
This makes me wonder:
Can the diyAudio store beautiful chassis handle much more power?
OK. Based on the dimensions provided by pfarrell, and some rough calculations, the surface area of this chassis heatsink should be 15% higher compared to the heatsink of a 4U Dissipante chassis, making this chassis suitable for any FW amplifier project if you take into account its internal space limitations.
Nice!
Maybe the diyAudio Store can make this chassis a permanent offer in the future!
First i like them to have industry standard ¾” spacing so i can use my dual Pomonas.
Typically these:
ConneX Connector Dual Binding Posts 5-Way Slot
This amp might seserve some ETI posts thou (the WBT next gen are really hard to get close enuff).
Binding Posts - ETI Research
dave
Yes, the chassis will be available after the lottery. It will be sold for a regular price, that is in line with the prices of other chassis the store is selling.
What's printed on the front (VFET? SIT? MOSFET?) and styling cues (angled lines, vertical lines) might vary, and we'll try to produce ones with text that matches what you are building. What do you want to use it with?
One advantage of using silver chassis is that we can digital print black on silver in a single pass, which looks really sharp and crisp. To digital print a nice medium-grey (rather than a bright white) on black means printing white first, then grey, which doesn't look as good and requires screen printing. Screen printing means having to produce the screen, has some production limitations, and isn't really suitable for small batches, which means it's hard to change the design or text. Silver with digitally printed black text looks really sharp, allows us to be flexible with the printing and appears to be a winning combo moving forward.
It's a nice chassis. There is the "V" version you see which was designed specifically for this VFET amplifier, as well as a more classic / timeless design with vertical lines. There may be other variations in the future.
We produced 200 of these chassis to go with the limited run of 180 VFET-included kits. This first batch of chassis are being offered via the lottery, sold at-cost, and numbered. Congrats to anyone who gets one of those.
The extra 20 was to ensure those lucky few diyAudio members who have their own VFETs didn't miss out. It looks like there might be more than 20 people in that situation so it looks like we'll be making a second run of chassis for them, and yourself if you'd like.
One thing at a time, but yes, there will be more of these and you will will be able to buy them (whether at the regular price or not TBD).
Yes. We wanted people who are on a budget or wanted to scratch-build enclosures to be catered for. Any extra chassis won't have a problem finding a home.
Thanks for all of the efforts from the people who have made this happen.
I am one of those people who are just unlucky when it comes to "winning" something.
But I did purchase a nice stash from the kind gentleman in Japan, thank you as well.
I am glad the chassis will be available for the rest of us to purchase, although I would think "the extra 20" may be a little light
I am one of those people who are just unlucky when it comes to "winning" something.
But I did purchase a nice stash from the kind gentleman in Japan, thank you as well.
I am glad the chassis will be available for the rest of us to purchase, although I would think "the extra 20" may be a little light
Yes it was a little light, especially if most people choose to take the chassis (a variable). We also didn't know how many had VFETs already (another variable). The only proper way to know demand and ensure nobody is annoyed is to do a pre-order. But we didn't want people to have to wait 6 months and pre-orders come with their own littany of problems, especially when they are being done at-cost with international shipping charges (yet another variable). Between the start of the B1K pre-order and when we shipped, COVID hit and FedEx shipping prices tripled (we didn't ask customers to cover the change in shipping prices).
This was the most complicated offering the store has organized yet with a lot of moving pieces. We've learned a few things along the way though that will make what's coming in the future even better