Re: Heat sink for T)-220 transistors for G08 monitors?

right. IIRC; the heatsink solders to a unconnected pad for mechanical stability (and I use that term very loosely)

From: Jonathan Koolpe
Sent: Tuesday, October 01, 2013 2:09 PM
To: vectorlist@vectorlist.org
Subject: RE: VECTOR: Heat sink for T)-220 transistors for G08 monitors?
Got it...forgive my ignorance :) .

I'll check the solder mask on the bottom of the board when I get home, but I'm thinking that that pin that solders to the board may just be to stabilize the heat sink :) . If true, then I imagine any heat sink that fits the TO-202 packaging would suffice.

Jon

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Date: Tue, 1 Oct 2013 13:41:20 -0500
Subject: RE: VECTOR: Heat sink for T)-220 transistors for G08 monitors?
From: rlboots2@gmail.com
To: vectorlist@vectorlist.org

Heatsink, unless isolated from the tab, would be connected to the collector inside the transistor. This will NEVER be grounded on a monitor.

On Oct 1, 2013 1:07 PM, "Jonathan Koolpe" <jkoolpe@hotmail.com> wrote:

  Oops...my mistake...I did mean for the TO-202 style :) .

  So is the pin from the heat sink that solders to the G08 deflection board not for ground then?

  Jon

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  Date: Tue, 1 Oct 2013 13:01:48 -0500
  Subject: Re: VECTOR: Heat sink for T)-220 transistors for G08 monitors?
  From: rlboots2@gmail.com
  To: vectorlist@vectorlist.org

  No, don't connect the heatsinks. And make sure you get the right heatsink, the old MPSU style transistors were TO-202.

  On Oct 1, 2013 12:55 PM, "Jonathan Koolpe" <jkoolpe@hotmail.com> wrote:

    Hey all!

    I just picked up some G08 boards that I'm hoping to restore so I can get a second G08 I have back running...I know...a tall order! :)

    One of the deflection boards is missing all of the TO-220 transistors for the P600 circuit. I have the NTE replacements at the ready, but no extras of the foil/heat-sink assembly that attach to these transistors. Is there a good source for replacements for these heat sinks?

    And do they need to be grounded as I think they were in the original board configuration (as they were shaped such that they would fit over the metal top of the transistor and then the bottom could be soldered to the board directly via a hole that, once soldered, connected to a ground point)?

    Thanks,

    Jonathan

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Received on Tue Oct 1 22:07:53 2013