Leaderboard

What are peoples' thoughts on PCB mount transformers? Pros/cons/pitfalls? I thought it'd be nice to not have to bolt/mount a bunch of toroids (or any, if at all possible) to a case. Yes, the silkscreen flying off the edge means the transformer is slightly wider than the PCB, but I had specific size requirements for this board.

Built up a second frontend for a power amplifier I am working on. Biasing one channel as we speak!

Nils Frahm - All Melody

Bacon n Egg flatbread

One thought of mine was a steady stream of swear words upon realising that the footprints of PCB mount transformers aren't always 100% identical between manufacturers I waited a couple of weeks for boards only to realise that the secondary side footprints were off by 0.2" because I chose a different manufacturer, but the physical size of the transformer was identical. This obviously doesn't apply to e.g. the Talema PCB mount toroids, but it's worth remembering to always check the manufacturers datasheets Other than that I think it is a great idea for transformers under 30VA or so, because PCB mounting is more flexible than bolt mounting IME

I'm not sure why they don't do that -- instead of trying to mimic ANC headphones by electronically trying to fight the noise, just completely encapsulate the IEM so that it naturally acts as hearing protection, then add mics to filter in the outside noise, compressed or limited, of course, to reduce the amplitude of loud sounds.

Test Tone @ Home live right now: http://mixlr.com/illuminator/chat

The main problem back in the day was that phono stages were generally crap. Indifferent RIAA accuracy, poor overload margin, and high distortion. I have a circuit of a '70's period ortofon MC phono stage somewhere that had an array of parallel 680uF 3V tantalum bead capacitors between the cartridge and the (100 ohm) load. Ugh. Ugh, ugh uuughhh! And it was not cheap. An even modest quality phono stage now runs rings round that sort of nonsense.

Neat! How big is the PCB?

trying out the RAAL tweeters in the new rig. No big surprise but they are a bit to polite when crossed over at 2800hz, compared to the Horn tweeters. (and 10db less efficient than the mids) It plays better higher up in frequency, but i guess it's better to go with a horn tweeter and separate supertweeter crossed over at 10K to retain the aggressive growl of the horns. Fun experiment though

I'm listening my system; Dac, Classé preamp, CFA/bal and the LCD2. All system on Bal connection. Guys, this is just brutal. Thanks Dr. Gilmore !! I consider that the Dynahi has a more "musical" sound and the CFA/bal has a flatter and more precise sound being a beast in terms of power. Now I am considering whether to do my unbal/bal or to use the CFA directly using the preamp outputs of my Classé.

Yum, analog

@Laowei wow someone measured a few times before putting everything into the chassis Nice Finally about to finish up a solenoid driver board to send out. Was gonna make it smaller but got too lazy

Got word today that ProPartsUSA has finished my double adjustable shock conversion on my front shocks. Should ship to me on Thursday or Friday. Should be fun. They sent me the shock dyno charts but I really don't know what to do with them.

Moved too far from downtown to not have a car, and I narrowed the list down to a Subaru or a Subaru, after realizing an AWD Wagon was what I needed. The BMW that was perfect was just too much of a risk... So I bought a turbo Vovlo. Leaves me $$$ to buy a bike [emoji4] Thanks for the find, Jeff. Sent from my ONEPLUS A3000 using Tapatalk

Mostly a packaging job. Had around an old Paul Hynes PR-3HD 18.5VDC voltage regulator and 2x 18VAC Rcore transformer I bought years ago to use in powering an old Mac mini. It’s capacitor input. Wanted remake as a 12VDC supply and was able to adjust it to design. Bought a bare case off eBay. Added a inductor and capacitor bank to use as choke input expecting ~35% rectified DC voltage drop. Powers up no-load OK. Need to now get some power resistors to stress test at 5A to see if drop out is exceeded and starves the regulator. Might have to go to a 2x 22VAC.

Being doing some more editing and non-editing of photos: IMG_0042 First attempt at a panorama with my iPhone. Strictly speaking this was the first photo I've ever taken with an iPhone. IMG_2070 I re-lamped (replaced the bulbs) both of these lights. I used a faux vintage LED bulb on the art nouveau lamp on the right. It is supposed to emulate carbon strap bulbs from the 1920s. I used a "vanity" LED bulb for the art deco lamp on the right. The bulb was too tall the interior space inside the globe, so I had to remove the plastic dome from it. That involved me twisting it off with an oversized pair of channel locks. IMG_1936 Edit 1 3-2 2 Jernegan pond, converted to black & white and duotoned. IMG_2029 An idyll, or the appearance thereof. IMG_1958 Edit 2 Sweetened Water Pond in early December. Converted to black & white and duotoned in Photoshop. I spent considerable time mucking around with this image. I'm still not 100% happy with it. IMG_3405 Infrared study I did over two years ago, with my IR-modified 5D and a Nikon 75-150 F/3.5E push-pull zoom. IMG_3362 17-40mm at the wide end on my IR5D. Straight out of the camera with no edits, which is a rarity for IR.