RE: 25" Amplifone Monitor (voltage regulators)

> What type of hardware is usually used to mount the
> 7924cv Voltage Regulator on the Amp HV board? Plastic bolt/nut?

It is a plastic shoulder washer/bushing w/ metal nut & lock-washer-bolt.

Here are some pics:
http://www.classicade.com/ampvr/front.jpg
http://www.classicade.com/ampvr/backside.jpg
http://www.classicade.com/ampvr/washer-n-bolt.jpg

Sometimes the reg will come w/ the plastic washer, sometimes not.

> -----Original Message-----
> From: owner-vectorlist@synthcom.com
> [mailto:owner-vectorlist@synthcom.com] On Behalf Of Gregory S . Erway
> Sent: Friday, March 8, 2002 10:12 AM
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: 25" Amplifone Monitor (voltage regulators)
>
>
> This is exactly what I was worried about once I started using
> my brain a little bit. Thank you for confirming I was just
> stupid. What type of hardware is usually used to mount the
> 7924cv Voltage Regulator on the Amp HV board? Plastic bolt/nut?
>
> Thanks so much.
>
> Greg
>
>
>
> On 2002.03.08 11:45 Andy Welburn wrote:
> >>> Voltage Reg 7924cv inserted in VR2 is used to regulate -24v. This
> >>> was missing from my HV board all together when I got it.
> There was
> >>> nothing in that component space. So I assumed that I
> needed to get
> >>> TO-220 hardware to mount the reg when I put it in. I
> notice that pin
> >>> 1 of the reg goes to a trace that goes to ground (this is
> verified
> >>> on the
> >> schematic).
> >>> I also noted that pin 2 of the 7924cv and the mounting tab have
> >> continuity.
> >>> I did not replace the 7824cv last night but am pretty
> sure that pin
> >>> 2 of that regulator (or any pin of the 7824cv) can have
> continuity
> >>> with the mounting tab since both regulators are mounted
> to the same
> >>> metal heat sink bar. Can anyone verify this for me? Or did I do a
> >>> major screw up and use a metal screw to mount VR2 when it should
> >>> have been plastic or something? The manual is absolutly
> no help in
> >>> trying to figure out what the mounting method would be. I
> know that
> >>> VR2 is suppose to use an mica insulator (which I did) and VR1
> >>> (7824cv) is not suppose to use a mica insulator.
> >>
> >> 79xx should use insulator 78xx doesn't need to, when its a
> negative
> >> chassis ground.
> >>
> >> using a metal screw to bolt the 79xx regulator to the heatsink
> >> defeats the object of the mica insulator :)
> >>
> >>> I was also wondering if heat sink compound should be used on VR1
> >>> (7824cv) even though there is no insulator. My assumption is yes.
> >>>
> >>> Thanks in advance for any help provided. And if I screwed up here
> >>> any hints as to what components I fried (probably in the
> supply of
> >>> the voltage to the regulator from the deflection board)
> and should
> >>> check would also be appreciated.
> >>>
> >>> Greg
> >>
> >> Andy
> >>
> >>
> >>
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Received on Fri Mar 8 11:57:37 2002