ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Photo Editing Software?
by Fridayrack - 12/03/21 05:05 AM
Square D "All-In-One" Panelboard
by NORCAL - 11/30/21 12:48 PM
Where is Everyone?
by luckyshadow - 11/21/21 10:14 AM
It's been an interesting career
by The Watt Doctor - 11/19/21 09:56 AM
Well I am back to stay (nearly 6 years)
by The Watt Doctor - 11/19/21 09:17 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 46 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#127435 07/11/01 04:21 PM
Joined: May 2001
Posts: 17
H
habbbby Offline OP
Member
Is there a schematic here somewhere of a flor. ballast, two lamp. Two red, two blue and two yellow, with of course the feed. Iam curious as to how the coils are layed out internally.

#127436 07/11/01 04:37 PM
A
Anonymous
Unregistered
Not yet, but four days ago Scott wrote: "I'll post some Ballast drawings ASAP...", so stay tuned.

#127437 07/12/01 12:05 AM
Joined: Oct 2000
Posts: 2,722
Broom Pusher and
Member
habbbby,

Sounds like you are describing a Rapid Start - Hot Cathode Ballast for 2 lamps - typical of F40T12 lamps and HO/VHO lamps of 4' and 8' length.

Unless something changes between tonight and Friday, I will have a whole weekend off!!! Ya, Baby!.

Plan to post a few Audio Xover [passive] schematics, a couple simple motor drawings, and whatever I can draw/convert/post. I'll add a couple Ballast drawings - especially the RS hot Cathode Ballast you are asking about.

Your request is granted [Linked Image]

Scott SET


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
#127438 07/12/01 04:45 AM
Joined: Oct 2000
Posts: 5,389
S
Member
cool!

[Linked Image]

#127439 07/12/01 09:26 PM
Joined: May 2001
Posts: 17
H
habbbby Offline OP
Member
yes that is the specific type I was asking about. Thanks, I will be looking for it!

#127440 07/15/01 11:32 PM
Joined: Oct 2000
Posts: 2,722
Broom Pusher and
Member
Well, the Monkey wrench of time got thrown into the cogs of my "so-called" weekend off [Linked Image]

Instead of getting things done like previously planned, only had Sunday off [thankfully [Linked Image]] - which gave me enough time to get 25% [1/4] of things done [Linked Image]

Nevertheless, I have posted the Ballast Schematic in the new Technical Reference area, which habbbby was inquiring to.
It's under the subject F40 T12 2 lamp Ballast schematic type 1

I hope it's to your liking!!!

P.S. check out the speaker crossover schematics posted there too..

Scott SET


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
#127441 07/20/01 02:00 AM
Joined: Oct 2000
Posts: 5,389
S
Member
can the function of the 'heater' winding be explained?

#127442 07/20/01 03:29 PM
A
Anonymous
Unregistered
It is a property of most materials that they will give up electrons much more easily when hot - meaning temperature. This was common nuisance with tube devices that had to be turned on to warm up for several minutes before they would begin working.

Cold cathodes typically employ a much higher discharge voltage so they can emit adequate electrons at typical room temperatures. Alas, this is much less efficient.

Hot cathodes have a heater (basically a little tungsten filament with a special coating) that emits lots of electrons to travel through the gas in the tube and make it glow.

Hot cathodes are quite a bit more efficient. About the only advantage of a cold cathode is the instant start..

#127443 07/21/01 02:04 AM
Joined: Oct 2000
Posts: 5,389
S
Member
thanks...
would this explain HO's ?

#127444 08/30/01 09:24 PM
A
Anonymous
Unregistered
I just noticed your question. What is it that you wanted explained?

Page 1 of 2 1 2

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Top Posters(30 Days)
dsk 2
NORCAL 1
Popular Topics(Views)
286,522 Are you busy
218,952 Re: Forum
205,076 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5