Search found 3301 matches

by jack
Mon Jan 31, 2011 9:17 am
Forum: Assorted Stuff
Topic: Next AudioJumbly?
Replies: 157
Views: 19620

Any point in grabbing a coffee & putting faces to names for those of us who are not old hands?

Cheers
by jack
Sun Jan 30, 2011 5:38 pm
Forum: Everyones Projects
Topic: 833A (GU-48) Amp
Replies: 1170
Views: 141729

ps. I have two DOA 833s in my "Hall of Fame(Infamy)" (Finfamy?) Arrived from the USA with internal damage, though not outgassed. :evil: Did you get compensation for them from the seller ? They offered compensation via the USPS but only if I paid to return the damaged tubes to them first - as the tw...
by jack
Sat Jan 29, 2011 6:43 pm
Forum: Everyones Projects
Topic: 833A (GU-48) Amp
Replies: 1170
Views: 141729

1mm twin & earth (6242Y) is rated at 14A RMS. If you are happy with solid core, use that. Its cheap as chips and you've probably got some already (you can always find bits buried in your walls...)
by jack
Thu Jan 27, 2011 11:00 pm
Forum: Assorted Stuff
Topic: Apple Mac Laptops
Replies: 36
Views: 6375

Re: Apple Mac Laptops

Daughter needs a new/secondhand laptop. She's paying for this one herself. Thank God.. I used to run the IT for a fairly large City finance company - we had 100s of laptops - wintel & apple - the traders treated them rough! Mostly Dells, HPs & Sony Vaios with a few Apples Apples are beautiful, but ...
by jack
Thu Jan 27, 2011 6:11 pm
Forum: Everyones Projects
Topic: 833A (GU-48) Amp
Replies: 1170
Views: 141729

Thinking about the wire rating (1000V & 4.5A), does the current capacity go up as the voltage comes down ? Current rating is for the wire in air (i.e. not in the centre of a bundle). P = I^2 x R, so its the resistance of your bit of wire times the square of the current - the voltage bit is just how...
by jack
Tue Jan 25, 2011 2:11 pm
Forum: Assorted Stuff
Topic: BT telephone poles.
Replies: 47
Views: 6361

Re: BT telephone poles.

Has anyone any experiences of getting a Wayleave with BT for having a telephone pole on their property ? We have two - one for a cottage in the grounds and one for the main house - they are fed from a pole in the lane adjacent, however, they only service our land - Just had both replaced with new o...
by jack
Mon Jan 24, 2011 4:24 pm
Forum: Assorted Stuff
Topic: Microwave oven
Replies: 10
Views: 2427

All depends what sort of "HV" you're in to.... If you fancy a small Tesla Coil or Jacob's Ladder, the MOT (Microwave Oven Transformer) gives you approx 2100VAC on the secondary at a bunch of mA (about 500mA but depends on your oven's power). There is an HV diode (typically 14kV @ 500mA) and a MOC (M...
by jack
Mon Jan 17, 2011 10:57 pm
Forum: Assorted Stuff
Topic: Shiny...
Replies: 1
Views: 1206

Shiny...

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200470598507 I'm going to get one for the hell of it - nice to have something fully isolated (don't risk the main scopes) in an HV environment (if it can stand the noise...). 2msps makes for 1Mhz max and realistically 250kHz... but for 50 quid? Who'...
by jack
Thu Jan 13, 2011 7:35 pm
Forum: Assorted Stuff
Topic: Next AudioJumbly?
Replies: 157
Views: 19620

pre65 wrote:
Dave the bass wrote:
nickds1 wrote: ...indeed a marriage made in Heaven... :angel11:
Mrs Doyle does the cakes BTW....

Drink!B
Feck !
You're stealing all my lines.... (What do you say to a nice cup?)
http://www.youtube.com/watch?v=Whbc5YJz7OU
by jack
Thu Jan 13, 2011 1:52 pm
Forum: Assorted Stuff
Topic: Next AudioJumbly?
Replies: 157
Views: 19620

Dave the bass wrote: Strippers. ... Cakes...
...indeed a marriage made in Heaven... :angel11:
by jack
Thu Jan 13, 2011 11:32 am
Forum: Assorted Stuff
Topic: Next AudioJumbly?
Replies: 157
Views: 19620

Next 'Jumble' is on Sunday 13th. Feb. Anyone going? ATB, David. D'ye know what. I've lived in TW or thereabouts for 30 years and had no idea about this event... mind you, I've only been messing with valves for the last two or three (excluding "when I were a lad" and all that drivel...). Thank you s...
by jack
Tue Jan 11, 2011 9:22 am
Forum: Everyones Projects
Topic: Testing 13E1s...
Replies: 18
Views: 4582

Testing 13E1s...

I've been wondering for a while about how to test/match 13E1s on a Hickok 539C...

Anyone tried measuring these on a Hickok?

Cheers
by jack
Tue Jan 11, 2011 9:15 am
Forum: Everyones Projects
Topic: Power Supply Caps
Replies: 8
Views: 2987

Re: Power Supply Caps

I'm after some cheap power supply capacitance @ 1000V min for my 813 PP amp. I have 2 470u 500V BHC jobbies and would add another pair to obtain 235u @ 1000V for the other channel at a cost of about £50 but they're awaiting delivery for ages already at Farnell and who knows how long that will be. ...
by jack
Tue Jan 11, 2011 9:02 am
Forum: Assorted Stuff
Topic: What It's All About
Replies: 24
Views: 3812

Mike H wrote:Isn't it amazing how cats want to sprawl on hot things.

We had one once liked to sleep on top of a paraffin heater. His whiskers used to get singed at the ends where they hung over the front edge where the hot air comes out :shock:
Printer jam?
by jack
Mon Jan 10, 2011 3:45 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 11190
Views: 911612

So let me think about this ~ there's an electric motor that spins some blades which keeps the thing charged up? Where's the energy for the motor come from?   That's the problem ! The inventors would (probably) have you believe it's perpetual motion. I would love to believe it was true. :wink: Seve...