penmarker
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Posts posted by penmarker
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Been watching Chewin The Fat and Limmy's Show for like a few weeks. Fucking A.
I never knew I have a Scottish humour.
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I jumped on a half price offer for 56 and later checked the title its a Fairchild. The 06 I can only find On Semi. hFe matching shouldn't be a problem since I got one of those AT-Mega testers.
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Would a mixture of Fairchild and On Semi for MPSW56-06 matter?
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Anybody has experience with electronic constant current loads from PSU testing purposes?
Quite interested but I'd wanna weigh in other comments first.
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I think you're referring to Aerogel. Excellent insulation capabilities, ultralight, and mostly made of air?
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1 hour ago, nopants said:
why did they make the cable detachable? sounds like they're asking for trouble when it comes to third party. I also like how they have to specify it's not for daily dis/connecting haha
Sent from my Pixel 2 XL using Tapatalk
The cable only has about 600V running through them, what could possibly go wrong.
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Wink wink, nudge nudge.
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For on ears I've never failed to recommend JVC HA-S500. Good for hip hop and those big boom songs. Cheap as frig, buy 4-5 and throw them around the house, into your work bag, at the office, everywhere.
Low impedance, high sensitivity, can drive to deafening levels straight out of phone or computer.
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On 12/9/2017 at 10:08 AM, Bjorn said:
At least until the bass dropped.
If I were a billionaire I’d probably get one just to listen to Drake and Kendrick Lamar. I’d probably up the wank factor to 11 with a little gold in there as well. The Sennheiser guy did tell me an Asian customer ordered one with precious metal details for another 50k. Brought the total to a 100k.
Wank wank.
I have no idea why it works, but the dumbest working sales pitch I see all the time is "More than 20,000 people have been using our product" and "Someone in Minnesota bought 3 for his family members and customized them for $15,000 extra each"
Dude who cares if 20,000 idiots are buying your product, that's not a defining factor for quality.
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I have this current board. Is it possible to replace MPSW56/06 with MPSA?
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Are those to replace that340?
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Today I went to my office to pack my stuff. I'll be starting a new job on the 4th of December, I have 8.5 days of day off and I need to finish them before my last date. So I'm on a 2 week holiday now I guess. About time I got some salary increments.
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Yeah the tester does measure HFE, it's based on the ATMEGA328 just not sure how accurate is it.
Back then I got some suggestions from diyaudio to use a DY294 for the higher power 2SA2922 (building NAP200 clone) because it allows adjustment on the testing current. But since the 56/06 transistors are only small TO92 I guess the one I linked could work?
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How good would something like this for transistor matching?
https://www.ebay.com.my/itm/152443029396
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37 minutes ago, mwl168 said:
"gall bladder" level? WTF?
Its the Google Translate doing its magic. IIRC transformers are translated into "cows".
I've bought a Naim NAP200 assembled board once. They replaced all polystyrene caps with mica and the 2922 are fakes - among others. In retrospect, for the amount of work needed to redo the thing I should've started with a blank board.
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Is it possible to replace MPSW with MPSA?
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I think I found the Dynalo gerber files. There are several iterations with SMT versions as the recent ones. I don't know if I can share the Google Drive link since it was shared to me by Mr. Gilmore.
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11 hours ago, kevin gilmore said:
this guy will repair your piece of shit for you, the shipping both ways is going to be more than a liquid carbon is actually worth.
Dude even sells an RK50
https://item.taobao.com/item.htm?id=555379677261Perfect for when you want your volume pot to cost more than the whole build.
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14 hours ago, sbelyo said:
The best solution I've found is to wrap the transformer in a strip of grain oriented steel. I was able to get mine from Avel Lindberg where I bought the transformer. Beyond that it seems hard to source by itself.
How does it compare with the metal transformer can?
I'm planning to complete the build first and assess the level of interference. If required I'll add in the shielding.
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I thought it sounded like Doge, as in the Shibe Doge.
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11 hours ago, gepardcv said:
@penmarker: Your transformer is really close to your amp boards. Mind the shielding and the wiring, or you'll have EM interference. I did the same thing, and I'm still working through some noise problems. (Though with recent posts on this thread, I'm now wondering if the THATs are partially to blame.)
Thank you very much. Yeah I've been looking back through the thread and I saw some images of single chassis builds including yours. Initially I've been looking at transformer cans but they're all far too tall to fit in my case. I'd have to get a smaller transformer with a smaller VA, current choice is 160VA.
Rumina does have transformers directly below the amp boards but they're shielded well with sheet band around it. link
That would be very helpful.My other option is to build a 2 chassis amp, but I think it'll be too bulky. I mean, it's a headphone amp the size of a power amp.
**edit
Heheh. Looking at Nuforce HA-200 gave me some ideas...
If only the case I ordered isn't 70mm tall... more like 40-50mm would be nice for a stack of balanced.
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They might have changed the pricing, now its $60.52 for 8 LSK170 and $69.47 for 8 LSJ74. That there alone costs as much as some mini headphone amps. I might just gamble choosing among ~4 THAT340 instead since we can get it locally/easily from Element14.
Anyway, I've purchased a chassis and thinking about doing a single chassis build. I've made a rough layout of what it could look like, appreciate it if others could chime in.
2 images; the first shows only bottom floor layout without the amp boards above it. The second shows all boards including proposed front panel layout.Toroid is in the middle and amp will be powered by single Beta22 mounted on heatsinks in blue. Orange board at the rear right is a balanced relay switcher with a small 12v transformer+BR for power.
Amp boards will be attached on the top of the case and fastened to the walls with standard L profile like others.Because of the size of the transformer, the only location it could be is in the middle where there aren't any tall components on the amp board above it.
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8 hours ago, gepardcv said:
I want to know, too. Was thinking of trying this to replace the THAT parts: https://diyaudiostore.com/collections/parts/products/linear-systems-matched-jfet-pairs-grade-b
Saw that site when I was googling about LSJ74/LSK170. That's mad, $49.99x2 for a balanced board.
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If you don't mind looking like a tool, a Sony PFR-V1 is cheaper.
If I were a billionaire I’d probably get one just to listen to Drake and Kendrick Lamar. I’d probably up the wank factor to 11 with a little gold in there as well. The Sennheiser guy did tell me an Asian customer ordered one with precious metal details for another 50k. Brought the total to a 100k.
2018 PCB Group Buy with TKD pots
in Do It Yourself
Posted · Edited by penmarker
How much is the price estimate for TKD 4CP-601 10K and TKD 4CP-2500 10K?