If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
The flea market season in Cupertino begins tomorrow, the second Saturday of a month between March and September or October. As luck would have it, weather forecasts predict a rare morning without rain. I'm planning to rent a space, for giving away or selling things that deserve better than e-wasting. Who can use some 15030 NST's?
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
I'm weary of continuous rain, but it stopped for 12 hours at flea market time.
I got rid of a ton of stuff. Gone now is everything from this listing except for power resistors I chose to keep for myself. The last eight 24-V-DC fans, sans resistors, were taken at 4 for a dollar. I brought one 15 kV NST, non SGFP, and held out for $40. Took it home unsold. Not a good plan because I have about five others. It's not a good time for me to become a seller on ebay. Maybe craigslist.
Towards the end I bought a couple of things, occupying much less volume than what had been sold or given away. Looking for a cheap loudspeaker, the first specimen found was a 25 ohm (!) unit.
Two semi-high-voltage plastic capacitors, obviously intended for pulse duty (e.g. copper ribbon terminals!) called out to me. How about a pocket size can crusher? The new caps can deliver enough joules to make a pathetic indentation. This morning I realized that the mismatched pair in series could store more energy, within V ratings, than they could in parallel. And would be better matched to work coils with a few turns.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
Here we go again! The swap meet begins in about 3 hours, as dawn breaks for another warm sunny day in Cupertino. I won't be going to sell, but might try to sneak in some stuff to make a FREE pile in some vacant space.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
The penultimate meet of 2016 comes next weekend. I'm planning to get a seller space & get rid of stuff. Come say hello if you're in the area.
In June I bought a couple of music box movements and some EG&G triggered spark gaps, in modules with trigger transformers already wired up.
In July I bought a 14 volt DC generator for pedal-power experiments, for $5, and carried it home in a bicycle pannier. It will complement a 14 volt automobile alternator, in fact they have similar size pulleys for v-belts. The generator seems to have only two electrical terminals, so I don't know how its output voltage is regulated.
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Monthly swap meet in SF Bay Area
