Oldschool tubes

What happens if you put a portable hole inside a portable hole?

Hiyooooooo! Someone's had their coffee this morning

My father also ran a TV/radio repair shop when I was growing up. I always thought it was fun testing tubes.

We had a tester in the front lobby like this:

We also had one like this in the back:

Yep. I enjoyed that part. The part I didn't enjoy was repairing apartment building distribution systems that got hit by lightning and the transformer potting blew out all over the inside of the chassis :-(

We had the Hickok tester. It went on service calls in case the problem was a simple tube swap-out. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
     It's what you learn, after you know it all, that counts.

A black hole.

That's a sure sign of an open-circuit heater.

-- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply)

Many of the early tube sets had _series_ wired filaments. So you either tested every tube, or probed every socket, trying to find the open one :-( ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 | It's what you learn, after you know it all, that counts.

This one is nuclear powered

so it doesn't need a heater.

It will switch 2 megawatts.

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

Seems parallel wired filaments would make things even more difficult.

-------------------------

** ROTFL !!

That one deserves the nincompoop award of the month.

..... Phil

No. Only the dead-filament tube wouldn't glow.

Better quality sets sported filament windings on the main transformer. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
     It's what you learn, after you know it all, that counts.

Those have been on back order since 1963, along with their set of tunnel paints. :(

+1

On the plus side, you can get roller skis now. Instant water available soon.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC / Hobbs ElectroOptics 
Optics, Electro-optics, Photonics, Analog Electronics 
Briarcliff Manor NY 10510 

http://electrooptical.net 
https://hobbs-eo.com

Is there any law of Physics, that Acme can't break? :)

That's probably the deepest philosophical question that's ever been asked on this NG!

Mike.

Falling on snow is pretty benign and often fun. Snow is soft and the coefficient of friction is low. Falling onto dirt and rocks and pavement might not be as fun.

--

John Larkin         Highland Technology, Inc 

lunatic fringe electronics

Skikes are a much better option for most people. Many rollerskis don't have brakes, or only have brakes on one ski. Skikes are like roller skis but they have larger pneumatic tyres, brakes on both, and they work with normal shoes. That makes it easier to keep your skin attached.

Clifford Heath.

[snip]

I have an 11-year-old grandson who is, for all intents and purposes, _pro_ level at ice _and_ roller-blade hockey (*) He takes some might nasty falls (he is, as you might expect, somewhat combative ;-), but he's padded every which way from Sunday.

(*) He is the go-to-guy for the _whole_ league when a substitute player is needed.

He's the first "jock" that I know of in the family history. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
     It's what you learn, after you know it all, that counts.