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Laowei

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Laowei last won the day on April 3 2019

Laowei had the most liked content!

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About Laowei

  • Rank
    Limited Edition Bronze Participant
  • Birthday 06/07/1957

Profile Information

  • Gender
    Male

Converted

  • Headphones
    Stax SR-009, SR-207, SR-003mk2
  • Headphone Amps
    KGHV-Grounded Grid
  • Sources
    Mac mini > Schiit Yggdrasil
  • Other Audio Gear
    DIY PP 6V6 amplifier. ALTEC 890C Bolero/Econowave modded speakers

Recent Profile Visitors

3,560 profile views
  1. Those reissue GL KT77s sounded sweet in my GG too.
  2. That’s the one I was thinking of JoaMat. The “Sandwich Amp” is only other electrostatic tube amp besides the DIY T2, that ties G3 to the Plate on the PCB. All others tie G3 to Cathode.
  3. I haven’t heard/read the actual reason so can’t speak to Justin’s stated policy of not using KT77s in his amps. Whether a design flaw in those particular tubes substituting for EL34s or his customers’ experience with a bad batch or two are possibilities, but only unfounded speculation. Just don’t put any KT77s in his amps.
  4. The trouble is with the non-standard pin out of JJ beam power “pentode” tubes (6CA7 and KT77) as seen in the DIY T2 circuit . In the DIY T2 (as well as the original T2), G3 (pin1) on the PCB are connected to the plate (B+). Using the big bottle JJ 6CA7 with its G3 brought out to pin 1, effectively makes the beam forming plates the anode. They were not designed to take the full plate load current. On all other Kevin Gilmore amps (except the all tube Grounded Grid amps which no one has built) connect G3 to the cathode (G1) on the PCBs. Using true pentode EL34/6CA7 or G3 internally cathode connected beam power tetrodes work fine here. Using JJ 6CA7s or JJ KT77s are the problem. In the DIY T2, true pentode= OK, JJ Beam power = problem, all other Beam power = OK. It’s easy to visually verify if pin 1 on the JJs is internally connected or not. Justin has his own customer histories that makes him advise not to use KT77s in his amps. So don’t do it there!
  5. Just searched..... and this might explain it. From the Pontiac Aztec Wiki page: “The Aztek was styled under the direction of Tom Peters, who would later design the Chevrolet Corvette (C7).”
  6. Bob Lutz’s quote “looks like an angry kitchen appliance” on the Pontiac Aztec comes to mind.
  7. Definitely the worst view of the car. Butt fugley.
  8. Here’s a profile shot. Chevy certainly borrowed the styling ques and proportions in this view from the Ferrari 458.
  9. The all new midengine Corvette Stingray was introduced yesterday. Set to go on sale next year with a “base price under $60K”. 495hp naturally aspirated V8. 8 speed dual clutch automatic transmission only. 0-60mph in under 3 seconds. Hope they get the QC worked out on this. The Caddy ATS-V I bought in 2016 was a lemon that the factory bought back.
  10. Let’s see if this works here. A 360 degree panoramic shot from Chuck Yeager’s seat in the Bell X1 https://www.airspacemag.com/articles/chuck-yeagers-cockpit-180964968/ Edit: Doesn’t appear to. Go to the link.
  11. You can substitute Dale Vishay RN60 series for KOA Speer MF1 resistors. __________________________________________________________________ Have had my CFAe amp powered up for over a week now and things have settled in. Tried out my IEM SR-003mk2 with new super comfy ear pod attachment and covers. These ear pods and amp together are a surprisingly sweet sounding combo.
  12. Taking the time to get well is the #1 priority. All else is just a DIY hobby. Don't push it. Get your health back first.
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