Bias Truble

Get support and show off your MetroAmp JTM 45 kit builds.

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butinox
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Location: Stjørdal, Norway

Post by butinox » Sun Feb 12, 2006 11:39 am

Yeah sux but.. what you gonna do..
Looks so hm... Re issue-ish :? until you get a look inside :)

shakti
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Location: Ramnes, Norway

Post by shakti » Sun Feb 12, 2006 11:52 am

Damn...gonna have to ask George if his supplier maybe makes a 240V version too. Can't use that square type... Fortunately I have some time to work around this.

Any other issues you encountered? Is that the board material that came with the kit?? I guess you added the bias pot on your own?

butinox
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Posts: 21
Joined: Tue Nov 15, 2005 11:33 am
Location: Stjørdal, Norway

Post by butinox » Sun Feb 12, 2006 12:07 pm

The bias adjustment kit came with my kit.
The board is also std. in the kit.
But it was a bit confusing because the turret lugs were placed different in some places than what's in the instructions. So i had to move some components because i had put it in the wrong place.

And also dont forget that the power cord won't fit here, so I filed out and put in an IEC socket.

And the wires on the choke are too big to fit with that 1/4" gromet.
Also .. to get the nut into the flat fuse holder was a noodle scratcher
But you know.. Brute force and ignorance does it.

shakti
Senior Member
Posts: 2053
Joined: Tue Apr 05, 2005 9:06 am
Just the numbers in order: 7
Location: Ramnes, Norway

Post by shakti » Sun Feb 12, 2006 12:21 pm

Yeah, saw the power cord thing, but I think I'll go with a hardwired one and just find a nice one around here that does the trick.

I heard several people had problems with the choke wires through that gromet. What gives?

And the instructions kind of hint that the fuse holder nut is a head-scratcher, but what's the fun with no challenges?

grumpy
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Joined: Mon Nov 14, 2005 8:41 am

Post by grumpy » Mon Feb 13, 2006 7:18 am

shakti wrote:Ouch, does that mean I have to specify a different indicator lamp? I just ordered a kit from George...really love the look of that amber lamp, though!
You can use the 120v lamp with no problems. I live in Australia with it's 240v mains. All you have to do is hook the lamp up to common and the 120v tap on your P/T primary. Even though your mains goes to the 240v tap and common, the primary of the P/T acts like a voltage divider and you will find 120v at the 120v tap. Easy!!

Grumpy

grumpy
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Post by grumpy » Mon Feb 13, 2006 7:36 am

Mmmmmm, Looks like maybe the Heyboer P/T doesn't have a 120v primary tap?? Can't quite see properly from the pics. I used MM and Marstran on my JTM's and they both had the tap so , no problem. It's a bummer if there isn't one on the Heyboer because the amber lamp looks really good!!

Perhaps, if you're game, you could still rig up a voltage divider with a couple of resistors to give you the 120v?

Grumpy

Guest

Post by Guest » Mon Feb 13, 2006 2:26 pm

Mine has 120v, 220v and 240v

butinox
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Joined: Tue Nov 15, 2005 11:33 am
Location: Stjørdal, Norway

Post by butinox » Mon Feb 13, 2006 2:27 pm

that' was me

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