Looking the the prices for the Bush House kit auction, it seems that some of the speaker prices look a bit high for well-used second-hand kit with no guarantee...
http://www.ppauctions.com/auction.php?id=67
http://www.ppauctions.com/auction.php?id=71
What do the panel think?
Search found 5487 matches
- Tue Jul 24, 2012 4:59 pm
- Forum: Speakers
- Topic: BBC auction...
- Replies: 5
- Views: 3642
- Tue Jul 24, 2012 9:06 am
- Forum: Valves
- Topic: Mazda pp3/250
- Replies: 12
- Views: 7176
Yep they are exactly same as the one illustrated on National Valve Museum page. Apparently they are the early version which first appeared in 1932. Just a few years older than me then! A few years ago I was finding valves at boot sales nearly every week. Last year I found 3 and until today nothing ...
- Sun Jul 22, 2012 3:39 pm
- Forum: Valves
- Topic: New OPT Amp...
- Replies: 22
- Views: 17017
- Thu Jul 19, 2012 3:22 pm
- Forum: Assorted Stuff
- Topic: Mobile phone question.
- Replies: 12
- Views: 5398
- Thu Jul 19, 2012 2:39 pm
- Forum: Assorted Stuff
- Topic: Mobile phone question.
- Replies: 12
- Views: 5398
- Tue Jul 17, 2012 10:28 pm
- Forum: Assorted Stuff
- Topic: sneaky induction
- Replies: 14
- Views: 4270
Pacemakers use such tiny current this is feasible. Cochlear Implants use power with all that digital processing necessary so so far C.I.s use lots of batteries and the batteries stay on the outside. I wasn't actually joking - here's the Register's article - http://www.theregister.co.uk/2008/03/12/h...
- Tue Jul 17, 2012 9:43 pm
- Forum: Assorted Stuff
- Topic: sneaky induction
- Replies: 14
- Views: 4270
- Tue Jul 17, 2012 7:25 pm
- Forum: Assorted Stuff
- Topic: sneaky induction
- Replies: 14
- Views: 4270
There was some work on cochlear implants using inductance fields to charge batteries inside the user's head! I believe the idea was shelved. They power pacemakers sometimes this way... My stepfather has one which also acts as a data logger of his heart activity, the data from which is downloaded ev...
- Tue Jul 17, 2012 2:37 pm
- Forum: Assorted Stuff
- Topic: sneaky induction
- Replies: 14
- Views: 4270
We've got one of those Lektrik Car Parking charger points right outside the main entrance to the building I'm working in right now. It's been there about a year now. It had a lekky car attached to it once. Popular, not! A couple of years ago I worked in the West End (of London) - loads of electric ...
- Tue Jul 17, 2012 2:04 pm
- Forum: Assorted Stuff
- Topic: sneaky induction
- Replies: 14
- Views: 4270
Shop stuff is varieties of RFID technologies - there are a bunch of those around, some more sophisticated than others - depends largely on the cost of the item how much complexity you want in the tag, e.g. just a resonant tag (set off alarm as you leave) or something that actually identifies itself ...
- Fri Jul 13, 2012 11:29 am
- Forum: Everyones Projects
- Topic: Power Amp Dummy Load
- Replies: 31
- Views: 18080
- Thu Jul 12, 2012 11:21 am
- Forum: Assorted Stuff
- Topic: Valve Amplifiers, 4th ed. MJ
- Replies: 0
- Views: 1191
Valve Amplifiers, 4th ed. MJ
Just been reading this - needs an errata (couldn't find one went I briefly looked this morning...) - I have corresponded with MJ before but didn't want to bother him unnecessarily...
My 3rd Ed. is probably the most heavily annotated book I have...
Anyone else had a look at the 4th ed....?
My 3rd Ed. is probably the most heavily annotated book I have...
Anyone else had a look at the 4th ed....?
- Thu Jul 12, 2012 11:16 am
- Forum: Assorted Stuff
- Topic: Nice bit of levitation
- Replies: 8
- Views: 3991
- Wed Jul 11, 2012 10:37 pm
- Forum: Assorted Stuff
- Topic: Nice bit of levitation
- Replies: 8
- Views: 3991
I believe the previous video relies on the Meissner Effect
Superconductors are great - This one is called diamagnetic levitation - it won an Ig-Nobel prize - you can do it with pretty much anything that has dipole molecules in it, e.g. water.
Superconductors are great - This one is called diamagnetic levitation - it won an Ig-Nobel prize - you can do it with pretty much anything that has dipole molecules in it, e.g. water.
- Wed Jul 11, 2012 10:21 pm
- Forum: Assorted Stuff
- Topic: A new desktop PC
- Replies: 33
- Views: 12934
Quadruple post there. That has to be some kind of record. That's android going insane - sorry. I'm on O2 and this evening the whole national network has gone nuts - 4 hours with no signal anywhere, then all insane! Of course, had you not posted, I could have gone back and removed them :) but now wi...