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out of interest i bought 2 pairs of similar headphones in 2024 i wouldn't call them competitors of 007 or 009 still - this is headphones for $260 should compete in sound with something that costs $260. i sold one pair to Spritzer - I think he bought them out of interest i listened to the second set for a long time, until i bought es lab es1a and es2a and 007s and etc as for amplifiers on the 30th i will have the opportunity to compare the new "PES-A2" with 717 and other amps the last one "PES-A1"seemed to be close in circuit design to (but that's not certain)
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HVRV The latest Class AB portable electrostatic ear amplifiers
HVRV HANSEN replied to HVRV HANSEN's topic in Headphones
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The Knuckledragger 3rd Memorial Slow Forum Post
swt61 replied to Knuckledragger's topic in Off Topic
See! Here you fuckers go again! You find an object so hideous that even straight people can't stand to look at it, then you decide "oh, let's paint a rainbow on it and make it homo-chic." Even rainbows and fairy dust have their limits! Stop misusing my culture! -
HVRV The latest Class AB portable electrostatic ear amplifiers
Omega_ELS replied to HVRV HANSEN's topic in Headphones
the last one " PES-A1 "seemed to be close in circuit design to ((but that's not certain)) https://www.head-case.org/forums/topic/16705-stax-mafia-electrostatic-portable/ on the 30th I will have the opportunity to compare it with 717 and other amps - Today
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Megatron Electrostatic Headphone Amplifier
JoaMat replied to kevin gilmore's topic in Do It Yourself
I use LTspice to understand and to get a hint how things work. I got this table with help from LTspice. Supply voltage +/-400 V, Rupper is upper tube cathode resistor, Rlower is lower tube cathode resistor, values give offset zero for given Rupper , the resistance is the total of paralleling resistors. Looking forward your findings. -
The Knuckledragger 3rd Memorial Slow Forum Post
swt61 replied to Knuckledragger's topic in Off Topic
This is a disgusting theft of my people's cultural traditions! We open the door just a little bit and you people start hijacking my proud people's heritage! What's next? Double headed dildos adapted as toys for your children? Nipple rings and Prince Alberts at the mall kiosk? You people have been raping our customs far too long, without even fully understanding what my people went through to carve out these beautiful and affirming ceremonies. Shame on you! How can you possibly understand the delicate nuances of these traditions? Oh sure, your high school dances almost always consist of some bone head sports star wrapped in a Black rubber gimp suit, complete with zippers at the mouth hole and bung hole, but do you really understand the proud history of such attire? You're making a mockery of our way of life! Do we walk around in your traditional straight garb of jean shorts, wife beater tanks, sandles and Black socks? No, we don't! We understand that these traditions don't belong to us. Not to mention we're far to fabulous to stoop so low. I'll end with one final insult to my culture... Never, ever ever should fish be within 100 feet of a glory hole! OMG! -
HVRV The latest Class AB portable electrostatic ear amplifiers
Oneguy replied to HVRV HANSEN's topic in Headphones
Looks interesting. There’s one of the amps for sale on head-fi now. -
The Knuckledragger 3rd Memorial Slow Forum Post
robm321 replied to Knuckledragger's topic in Off Topic
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shellylh started following HVRV The latest Class AB portable electrostatic ear amplifiers
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HVRV The latest Class AB portable electrostatic ear amplifiers
shellylh replied to HVRV HANSEN's topic in Headphones
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HVRV The latest Class AB portable electrostatic ear amplifiers
HVRV HANSEN replied to HVRV HANSEN's topic in Headphones
How do you know it's bad if you haven't heard of it? I expressed my doubts, and my Ukrainian clients have already started listening to this And he likes the sound of HVRV PESS-01 headphones -
HVRV The latest Class AB portable electrostatic ear amplifiers
robm321 replied to HVRV HANSEN's topic in Headphones
Haven't heard it, but I'm guessing it sound like ass -
The Knuckledragger 3rd Memorial Slow Forum Post
robm321 replied to Knuckledragger's topic in Off Topic
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The newer vaccines are two part, with a month in between shots. I'm told this is superior to the one shot vaccine. I too had no reaction. However, I've never had any reaction to any vaccine. As someone who while in his 40s spent 30 minutes looking for my cell phone, while it was in my hand the whole time, I cannot confirm this lower dementia risk factor.
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Thanks for your reply. I plan to test different combinations of static current and cathode resistor values to better understand how they interact. If I get some results I’ll come back and share them. For now, I’m planning to try around 27–30 mA of static current. It’s a bit difficult to find high-precision resistors around 1.2 kΩ, so on the cathode side I’ll probably increase to about 8 kΩ and see how it behaves.
- Yesterday
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The Knuckledragger 3rd Memorial Slow Forum Post
Voltron replied to Knuckledragger's topic in Off Topic
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Fan of this kid. Very sardonic sensibility and seems to really care about the musicianship.
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Once properly warmed up for an hour or so, the transistor legs sit at around 110, transistor casing at 100 and hottest part of plastic tab at 90 (all in degrees Celsius and with at least +/- 5 degrees or error possible; the IR-gun I use is not the most sophisticated). Definitely too hot to touch, though still a bit cooler than the EL34s . So a bit of margin on both die temperature and what PLA Pro can withstand, though I guess the latter will age quite a bit faster than it would at ambient temperature if I would leave the amp turned on 24/7. I normally don't post pictures because my case work is rather poor, but I found a long exposure mode on my phone which after some experimentation captures the tube glow without leaving the rest in darkness, so I thought I'd make an exception. Pardon the somewhat battered front panel. Should also add that it sounds great.