The Mysterious Poweray

Amp tinkerers and people who aren't afraid of 700 volts or so in here....

Moderators: Slowy, Capt. Black

User avatar
Slowy
Vintage Post Junkie
Vintage Post Junkie
Posts: 22828
meble-kuchenne.warszawa.pl
Joined: Wed Sep 09, 2009 4:13 pm
Location: Orcland
Has liked: 1018 times
Been liked: 2492 times

Re: The Mysterious Poweray

Post by Slowy »

Conway wrote:Frickin' awesome! (what's it sound like, btw?)
Really bad tempered. Like a 5E3 that missed out on finishing school.
Beyond a critical point within a finite space, freedom diminishes as numbers increase. This is as true of humans as it is of gas molecules in a sealed flask. The human question is not how many can possibly survive within the system, but what kind of existence is possible for those who so survive.

tubeswell
Gibson
Posts: 709
Joined: Sat May 23, 2009 4:32 am
Location: See 'tubeswell' in the phone book
Has liked: 64 times
Been liked: 65 times

Re: The Mysterious Poweray

Post by tubeswell »

What's the back look like?
He who dies with the most toobs... wins

User avatar
Slowy
Vintage Post Junkie
Vintage Post Junkie
Posts: 22828
Joined: Wed Sep 09, 2009 4:13 pm
Location: Orcland
Has liked: 1018 times
Been liked: 2492 times

Re: The Mysterious Poweray

Post by Slowy »

tubeswell wrote:What's the back look like?
powerayback.JPG
Beyond a critical point within a finite space, freedom diminishes as numbers increase. This is as true of humans as it is of gas molecules in a sealed flask. The human question is not how many can possibly survive within the system, but what kind of existence is possible for those who so survive.

tubeswell
Gibson
Posts: 709
Joined: Sat May 23, 2009 4:32 am
Location: See 'tubeswell' in the phone book
Has liked: 64 times
Been liked: 65 times

Re: The Mysterious Poweray

Post by tubeswell »

8-)

you should seriously consider upgrading the mains chord to a 3-wire mains chord with a proper safety ground.

For 3-wire mains grounding:

Disconnect the 2-wire mains chord (making a note of where the 2 leads in the old mains chord attached to the mains fuse and the PT primary winding)

Looking at the new 3-wire mains chord (you can just buy a cheap 3m-6m extn lead from the warehouse and chop the end with the 'female' socket off - strip the insulation back carefully separating and exposing the ends of the three wires inside. Flow the exposed tip of each wire up with a bit of solder)

The (brown) active (or phase) wire goes to the mains fuse, (and thence to the on-off switch and then to one end of the PT primary winding)

The (blue) neutral wire goes straight to the other end of the PT primary winding (use an insulated screw terminal to connect the leads if the PT has its own wire attached to the primary already).

The (green & yellow) earth wire gets a ring terminal soldered to it, which you then slip onto a separate, dedicated chassis bolt, fastened with a lok-nut. (you probably need to drill a 3/16" hole for the chassis bolt - 3/16" bolts and lok-nuts are cheap at Bunnings).

This way there is no risk of the chassis ever becoming floating w.r.t. ground potential, and saves you (and anyone else) accidentally getting zapped from otherwise touching a hot chassis.
He who dies with the most toobs... wins

User avatar
Slowy
Vintage Post Junkie
Vintage Post Junkie
Posts: 22828
Joined: Wed Sep 09, 2009 4:13 pm
Location: Orcland
Has liked: 1018 times
Been liked: 2492 times

Re: The Mysterious Poweray

Post by Slowy »

Thanks. It actually is a 3 wire; I know it doesn't look like it but it's there and the earth is connected.
If you're still worried, I'll post a photo. :D
Beyond a critical point within a finite space, freedom diminishes as numbers increase. This is as true of humans as it is of gas molecules in a sealed flask. The human question is not how many can possibly survive within the system, but what kind of existence is possible for those who so survive.

User avatar
Conway
Vintage Post Junkie
Vintage Post Junkie
Posts: 9846
Joined: Mon Aug 29, 2011 1:33 pm
Location: Auckland
Has liked: 243 times
Been liked: 966 times

Re: The Mysterious Poweray

Post by Conway »

No, that's alright. We're not bothered if you electrocute yourself...




:lol:
GUITARS ROCK - www.guitarsrock.co.nz
TONE LOUNGE - www.tonelounge.co.nz

User avatar
Conway
Vintage Post Junkie
Vintage Post Junkie
Posts: 9846
Joined: Mon Aug 29, 2011 1:33 pm
Location: Auckland
Has liked: 243 times
Been liked: 966 times

Re: The Mysterious Poweray

Post by Conway »

When I was a young lad - about 30 something years ago - I got a shock from the inside of an amp. It fair threw me across the room.
GUITARS ROCK - www.guitarsrock.co.nz
TONE LOUNGE - www.tonelounge.co.nz

User avatar
Slowy
Vintage Post Junkie
Vintage Post Junkie
Posts: 22828
Joined: Wed Sep 09, 2009 4:13 pm
Location: Orcland
Has liked: 1018 times
Been liked: 2492 times

Re: The Mysterious Poweray

Post by Slowy »

I always get a little thrill of anticipation whenever I delve into an amp.

Maybe this time.........

It's been too long since I rode my mountainbike. :roll:
Beyond a critical point within a finite space, freedom diminishes as numbers increase. This is as true of humans as it is of gas molecules in a sealed flask. The human question is not how many can possibly survive within the system, but what kind of existence is possible for those who so survive.

Post Reply