All Activity
- Past hour
-
How old DOS games actually sounded (if you had money):
- Today
-
HVRV The latest Class AB portable electrostatic ear amplifiers
HVRV HANSEN replied to HVRV HANSEN's topic in Headphones
It is hereby stated that the PESS-01 headphone head beam is not the final design, and there is a high probability that a better design will be made🎧 -
The Official Head-Case Photography Thread.
blessingx replied to Knuckledragger's topic in Miscellaneous
Went to the San Jose Lowrider Day downtown today. Quick visit, but some snaps from Hassy 907x 50c with XCD 45p (4x3) and Nikon Df with CV 40mm f/2 (3x2). Funny enough I liked more Nikon shots. -
The Knuckledragger 3rd Memorial Slow Forum Post
skullguise replied to Knuckledragger's topic in Off Topic
-
The Knuckledragger 3rd Memorial Slow Forum Post
Knuckledragger replied to Knuckledragger's topic in Off Topic
That reminds me, - Yesterday
-
The Knuckledragger 3rd Memorial Slow Forum Post
Torpedo replied to Knuckledragger's topic in Off Topic
Not really, but they were the ones leaving written evidence -
Omega_ELS started following Stax 717 with moded case
-
so what do we have here stax 717 in a strange huge metal case now the weight has increased from 5 kg to 11 kg I don't know who did it and why it seems like the case is made well, all the places for fastenings are made accurately but the weight... whoever did it seems to have no idea about the cost of international delivery of 1 kg by air... another strange thing is 2 side lemo connectors if we look at what is connected there, everything is simple this is 1 channel (left) is connected to one lemo and then the second lemo is connected to the 5 pin socket who and why did it - is a mystery to me tomorrow I will try to switch the jumpers to 220v and turn it on, and also connect the left channel back to the stax connector I wonder who and why brought the left channel outside the amplifier) it looks like there are no other modifications but I'm not sure about that...
-
- 2
-
-
-
He's a featured character in Jon Ronson's 2001 book Them: Adventures with Extremists (whether by luck or by some insight, Ronson has been ahead of this stuff for decades) On that topic, Ronson did a podcast series exploring the origins of lots of the culture war fights. Definitely worth a listen https://www.bbc.co.uk/programmes/m0011cpr/episodes/player?page=1
-
The Knuckledragger 3rd Memorial Slow Forum Post
mikeymad replied to Knuckledragger's topic in Off Topic
bSWYJ7akqNiZbFJ4dWNIO1NX7kegOuC5EntKw4Vo21w.mp4 -
Hey Head-Case, what's your bandwidth like?
MexicanDragon replied to Knuckledragger's topic in Off Topic
Congrat! That's faster than mine! -
Hilarious three part The Dollop podcast on Bo Gritz who after serving in the Vietnam War, used a cheerleading camp, psychics, sex workers and Clint Eastwood's donations to "lead" various failed attempts to rescue MIA POWs that didn't exist (and that's just the first episode). Failing up as they say, he was a "hero" and was supposedly the inspiration for an A-Team character and several Chuck Norris films. Later he showed up at Ruby Ridge and ran for president with the slogan "God, guns, and Gritz". Ahead of your time there Bo. If only you waited until 2016. Apple: https://podcasts.apple.com/us/podcast/the-dollop-with-dave-anthony-and-gareth-reynolds/id643055307?i=1000721616765 Spotify: 'Merica, it's older than you think
-
The Knuckledragger 3rd Memorial Slow Forum Post
swt61 replied to Knuckledragger's topic in Off Topic
Good god, they're gonna bruise that banana! -
The Knuckledragger 3rd Memorial Slow Forum Post
swt61 replied to Knuckledragger's topic in Off Topic
Hey, hey. The Greeks led the way. The were the first to find the "back door". -
-
The Knuckledragger 3rd Memorial Slow Forum Post
Grahame replied to Knuckledragger's topic in Off Topic
What about the Greeks, who seems have invented a lot of things. I asked, by the medium of mime, and the shopkeeper said, " For you my friend, special price, The "Mr. Steve" very special, not on display so as not to frighten the children" -
-
It's GRHV with either 325V or 330V secondaries (don't remember exactly), and I lowered the current limiting resistor to 3.6R I think.
-
Thanks for the report. May I ask if you are using a GRHV supply? And is your transformer secondary around 330 VAC for the ±400 V rails? I just want to rule out whether my drop is caused by insufficient transformer headroom rather than the current limit itself.
-
I see no drop under load at +/- 400V, so you might be just on the edge of your current limiting. I did run my XL at 33mA for a while which worked (and sounded) fine, but then changed back to 23mA to test some other stuff and right now it's dismantled for fitting of 2A3 heater supplies, so can't help with data points.
-
Thanks a lot for the hint. Since I haven’t ordered the test resistors yet, I’ll probably need some time before I can try it out on a new build. But for today I did some measurements on the current operating point, and hopefully these numbers help add to the pool of data. For easy comparison, I’ll use your same format. Based on the WE datasheet, I think both of our Vgk values are on the shallow side, but as Kevin has mentioned, modern 300Bs vary a lot, so I’m not 100% sure if this is correct. It might make sense to raise the current to 33–34 mA, in which case the required Vgk would move down (according to the WE300B datasheet, Vgk at 34 mA / 400 V is about –90 V). My expectation is that as the current goes up, the offset also increases and Vgk becomes more negative. To bring the offset back to 0 V, you’d adjust Vg, but when Vg changes, Vgk may swing more positive again. If possible, it would be great if you could validate this in LTspice. One more observation: with ±400 V supply, under load I measured about 389 V. I’m not sure if this is simply normal drop or if my current-limit is engaging. Could you let me know if your ±400 V rails drop as well? If yours stay right at 400 V, then I probably need to tweak my current-limit detection resistors.