dsavitsk

Aluminum will not do a lot to shield noise. The first thing to be sure is that it is not a grounding issue. Once that is ruled out, the best remedy is space. If you can't add space, try a plastic retaining screw and plate. When that doesn't work, try reorienting the transformer - turn it upside down, turn it on its side, rotate it, etc. If moving it does not at least change the hum a little, then revisit the grounding. But if reorienting does change the hum, but does not reduce it enough, the next thing to try is mu-metal shielding. It may work - it usually doesn't. Finally, try a different transformer. See if you can get an R core or C core or even an EI (the low radiated fields from toroids is much exacerated, and sometimes EIs are better.) Finally, contact a custom winder and tell them you need a toroid with low radiation - I have had SumR reduce the noise by 20dB with a well made transformer.

Many years ago, someone I know had to take away the keys from a grandparent. The grandparent, a former judge and thus in a position to do such things, called the local Cadillac dealer, bought one over the phone, and had it delivered.

There is a certain irony to a company that is part of an industry often accused of sex discrimination using a glass staircase as a symbol of progress.

IPT, sand buffer, step up, tube output stage.

Send me an email, we'll figure out logistics.

The fabled L3 is likely going to be called the Apsara. I have built that topology in a power amp before, but the headphone amp has considerable refinements over that circuit (which is lovely nevertheless). The tube amp I had at the show was the Copenhagen which is a pentode amp. Also lovely - pentodes are underappreciated.

Walnut and maple.

It shows a tiny statistical effect, but not the sort of thing you could watch and actually notice. There is certainly not enough of an effect to declare someone streaky.

https://en.wikipedia.org/wiki/Hot-hand_fallacy

Happy Birthday!

Happy Birthday!

3rded. Happy Birthday!

Happy Birthday!

Happy Birthday!

Happy Birthday!

Happy Birthday!

More or less. But the paper works well. I like to see the whole thing at once.

I tried some of the software offerings and found that they did not really fit my needs. So I decided to go old school. I bought a big roll of grid paper where I can put dates across the top, projects down the side, and keep track of lots of aspects. So far it works pretty well.

Happy Birthday!

Thanks. I feel older on this birthday than on any previous one.