RE: Amplifone won't focus!

From: Joe <jb_at_joesarcade.com>
Date: Tue Jul 29 2003 - 09:51:35 EDT

I've had 3 through here that have worked.. As far as I know all are
still working...

JB

-----Original Message-----
From: Curtis H. Wilbar Jr. [mailto:vector@hawkmountain.net]
Sent: Tuesday, July 29, 2003 7:32 AM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Amplifone won't focus!

I have one red HVT that is working.... and given the cost to
replace it... I hope it stays working for a long time :-)

-- Curt

>From: Dave Langley <robotron@ntlworld.com>
>
>
>Hi again ...
>
>> > When driven by a space duel PCB I cannot get the picture to focus,
turning
>> > the focus control on the HV board makes no difference at all.
>>
>>This may sound obvious, but check the wire comming from the focus pot.
It
>>can break but stay in place.
>
>That did occur to me this morning. I sent out the Email last night
after
>I'd packed up for the night (it was late and I was getting up early!)
>
>Having looked at the schematics this morning, am I right in presuming
that
>if the HVT is giving out volts to the focus/screen block if the screen
>control works but the focus does not? Is there any way to test the
focus
>block in/out of circuit ?
>
>Anyone care to comment on this?
>
>If this is the case then it must be the block itself (I have a scrap HV

>board somewhere to rob from) or the wiring to the tube. The tube
*should*
>be OK as it was taken from a working raster monitor.
>
>I'll have another play tonight.
>
>Anyone care to take a bet on how long this HVT will last? How many out
>there have red HVTs that are still running? The one that I have
running
>(at least partially) was taken from a damaged HV board with serial
number
>17800 (ish).
>
>
>
>Dave Langley
>www.robotron-2084.co.uk

Curtis Wilbar
Hawk Mountain Networks
vector@hawkmountain.net

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Received on Tue Jul 29 09:26:52 2003

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