Craig Sawyers

I like that washer a lot. I used the 7721-3PPSG. That has a longer bush length than the 7721-10PPSG (3.18mm compared with 2.41mm). But 2.41mm should be just fine. The downside of both our choices is the bush diameter of 3.56mm. The tolerance for a TO220 hole is 3.53mm to 4.09mm. Which meant that for some of my devices it was a really tight fit and needed to be pressed home. On other devices it just dropped in. But they fit into the hole in the ceramic washer just fine.

What kids won't be watching is a raft of Disney movies https://filmdaily.co/news/disney-plus-pulling-movies/

Plastic screws cannot take the torque, even at the correct an surprisingly low value from the On-Semi apps note. Found that out having bought a shed load of PEEK ones, only to resort to stainless. Don't forget a smear of heat sink grease between the package and ceramic washer, and between the washer and and bracket. Where did you get the rectangular bush from? That is very neat.

Jessie Matthews OBE, star of stage and screen - musicals mainly. This, looking like it was photographed recently was over 90 years ago aged about 20.

Happy birthday!

I think it is a different company. http://www.qstools.com/index.asp

I have that same Lie Nielsen low angle block plane too. Then I bought a regular angle and a rebating low angle block plane by superb Chinese Quangsheng. These are basically Lie Nielsen knock offs, but are fantastically good quality with a thick iron that takes a razor edge, and needs hardly any back flattening.

First the link. Chinese - what do you reckon the chance of obsolete sand from China being genuine? And second - What exactly are you saying? Please very carefully clarify.

Clark Gable signing autographs in 1958 in glorious Kodachrome

Well that is interesting. The killer, however, if these came from the US to the UK is (a) $18 shipping and (b) They would get stopped for VAT and a clearance fee of UKP10. So the actual price per quad is about doubled. But the same thing happens for the DIYAudio linear systems ones. All part of rip off Britain.

The key difference between a toroid and an R-core is primary/secondary capacitance and leakage inductance. R-core has primary and secondary on opposite legs. So the capacitance is low, but the leakage inductance is high. With a toroid, the capacitance is high, but the leakage inductance is low. So an R-core (like a split bobbin EI) is better for not coupling RFI between windings. But the leakage inductance means enough stray magnetic field to cause potential hum problems. A toroid by contrast, because of the tight coupling between the windings, tends to couple RF. But because of the low leakage inductance has a very low external magnetic field. Basically, horses for courses. I've used both types in various bits of my kit. But since I always use an outboard supply (for non-power amp use) either type has worked just fine.

That is taking the term "near field monitor" a bit to extremes!

Thanks guys! That was a fine day that started with a Zoom with the kids (well, 32 and 35!), and finished with an excellent steak dinner. And now - time for bed said Zebedee.

And now for something insane. The two monoblocks weigh half a ton, and in US speak around $400k . Dan D'Agostino going totally bonkers. https://dandagostino.com/products/relentless-monoblock.php

Good grief. Sounds really flaky.

We had the same demise of Maplin - a similar sort of thing in the UK to Fry's. Back 25 years or so back, they stocked audio parts like Elna Cerafine capacitors, and power drivers from Eminence. I know because I bought both from there because it was to go to place for Cerafine, and I built a 15" bass cabinet for my son using an Eminence driver, both bought over the counter. Then they made the mistake of dumbing down. So if you wanted a remote control gizmo, or a drone, or some rubbish audio tat that became the place of choice. It ended up folding in 2018 after it had changed hands four or five times. But oddly enough it has been relaunched entirely on a mail order business, mainly selling tat https://www.maplin.co.uk/ . I have no idea who owns the brand name now.

Damned right. All the high voltage, low capacitance stuff went west when "conventional" CRT based TV's bit the dust and flat screen took over. All of which needed a radical rethink of how to do solid state electrostatic headphone amps.

The other one I forgot to mention if you have deep pockets is Interfet. They do have possibly the lowest noise n-JFET ever, the IF3601/3602. These have wild and unpredictable Idss, but a noise voltage of typically 0.3nV/rootHz and a noise corner of a few Hz. If you can bear that $100 price tag for the dual version and $30 for the single.

It isn't confined to On-Semi. Rohm did the same thing with all their low noise offerings ages ago, So did Renesas with the J79/K216 - in fact lateral MOSFETs are a thing of the past. Most p-channel jFETs have gone, and many low-noise jFETs of any flavour. The latest to go is the very low noise J107 (another On-Semi casualty). NXP killed off the n-jFET BF862 (lower noise than the K170) and indeed all jFETs, period. Analog Devices has just EOL'd the monolithic dual MAT01, unusual because it BVceo is 45V; every other low-noise dual is 40V. So in one of my applications where the maximum Vce is 41V it is the only part that will do. Hell On-Semi even obsoleted that ubiquitous BC560! OK they still make the SM version, the BC860, but it is tough nuts if you needed the power dissipation of a discrete part. If a part does not go in an automotive, mobile device, TV or other ultra-high volume application, semiconductor manufacturers lose interest real fast. The glimmers of hope are Toshiba, Diodes Inc, Linear Systems and THAT. And LS is the only one with a credible line up of single and dual jFETs and dual bipolars in multiple package choice.

That is just part of OnSemi's quest to obsolete anything remotely of use to audio. They took over Fairchild and Sanyo and have systematically removed many much loved discrete transistors from both their lines. I hate OnSemi with a passion. A big fucking hatred. A big fucking passionate hatred.

FWIW I measured the TTA004b/TTC004b a little while ago. Proviso is that they are only in the range <12V and <10mA. But I have measured Cob and Early Voltage. Toshiba TTA004 TTC004.pdf

Have a great birthday Naaman!

You know - it is a long time since I enjoyed a cigar. But you guys have sure got me thinking....

Have a massive and spectacular day - happy birthday!

Have a great day! Happy birthday!!