Dragon's Lair Fans - Arcade Lifestyle

General Chat => Technical Area => Topic started by: anunaki on July 05, 2013, 02:14:19 PM

Title: K7000 power question
Post by: anunaki on July 05, 2013, 02:14:19 PM

Hi,

I've got a 25" WELLS GARDNER K7000 monitor I bought as a spare for my MK2 cab.

No I'm looking for a way to power it up (it worked great in the cab I pulled it out, but I couldn't get the PSU from the owner).

The manual mentions 120 VAC with an isolation transformer. So I need to get a stepdown convertor to get 120 V instead of 230, but I also need an isolation transformer.

Where can I get one of these?

Gr, Patrick

Title: Re: K7000 power question
Post by: Etienne MacGyver on July 05, 2013, 06:56:37 PM

i dont think you need a isolation transformer when using a stepdown, its already behind a transformer in that way, so its not directly connected to the mains.

Experts; please correct me if i am wrong..

Title: Re: K7000 power question
Post by: level42 on July 05, 2013, 07:37:04 PM

WRONG !

Title: Re: K7000 power question
Post by: Etienne MacGyver on July 05, 2013, 11:26:10 PM

Ok noted, thanks  ;D ;D ;D

Title: Re: K7000 power question
Post by: martin595 on July 11, 2013, 04:32:52 AM

The isolation transformer is vey important to adjust the voltage. As the high voltage can destroy the devices.

Title: Re: K7000 power question
Post by: anunaki on July 11, 2013, 07:54:37 AM

I understand that, but where can I get one?

Title: Re: K7000 power question
Post by: Etienne MacGyver on July 11, 2013, 09:45:05 AM

http://www.reichelt.nl/?ACTION=2;PROVID=2257;GRUPPE=C54;&utm_source=Google&utm_medium=CPC&utm_campaign=fgrun%3A%2BTrafos

Title: Re: K7000 power question
Post by: anunaki on July 11, 2013, 09:52:44 AM

Tx  :)

Title: Re: K7000 power question
Post by: anunaki on July 11, 2013, 11:24:56 AM

They only have 115 (/230) VAC, will this do?

I'm a noob on this, but I figure is it's a 1:1 transformation it will put out what you put in.

can I somehow regulate the stepdown converter to give 120 to this device?

Title: Re: K7000 power question
Post by: baritonomarchetto on July 11, 2013, 09:49:29 PM

115V will work fine, I have my hantarex working great with 110 V (lower limit eh!).

The most important thing is the power (VA) value. With a 20-21" go for at least a 100 VA, 150VA or higher for a 25"  ;)

To check if a transformer is an iso or a step down converter you can check for isolation between the primary winding (0-230 V pins) and secondary windings (0-115V in this case)