Re: 6100 HV transformer in an Amplifone HV PCB

Yeah will do John, the later 6100 had over voltage protection similar to the
Amplifones, the wire that goes to Gnd from the focus block instead goes to
the base of a 3904 so I will make sure that is connected the same way. I
have to drill some holes in the Amp PCB to fit the Transformer and run some
wire links. The focus block fits in place of the old Amp one. I will also
measure the HV with and without the MCI can. The 6100 HV transformer has a
few windings that aren't used....looks like a Raster flyback to me, didn't
the Disco use this Transformer?
I have just fitted a 25" Crt to my SW so don't worry, there is no way I am
going to ruin that by being careless!
----- Original Message -----
From: "John Robertson" <jrr@flippers.com>
To: <vectorlist@vectorlist.org>
Sent: Sunday, March 12, 2006 9:44 PM
Subject: Re: VECTOR: 6100 HV transformer in an Amplifone HV PCB

> Before you hook it up to a tube, it would be best to do a power up test
> using a HV probe to verify that you get only 22KV or so. Much more than
> (28KV+?) that can lead to soft x-rays...that was one other reason I went
> with my raster kludge, the raster monitors had overvoltage shutdown built
> in.
>
> John :-#)#
>
> At 7:54 PM +0000 3/12/06, simon hanlon wrote:
>>The heater output will be the same as used by the Amp as all it is is a
>>bit of wire wrapped around the core 3 times and connected to ground by a
>>.3ohm resistor, I will measure for 6v before connecting to the CRT. I have
>>notice that I will need a 15ohm resistor and a 350v 10uf cap to get the
>>180 b+
>>----- Original Message ----- From: "peter jones" <highwayman2000@mail.ru>
>>To: <vectorlist@vectorlist.org>
>>Sent: Sunday, March 12, 2006 7:50 PM
>>Subject: Re: VECTOR: 6100 HV transformer in an Amplifone HV PCB
>>
>>>Hmmm.
>>>
>>>make sure you use a hv probe and stand at the *side* of the tube, not
>>>infront or behind it.
>>>
>>>and the heater probably wont work, or it will blow the tube element.
>>>
>>>if the wg has a different number of primary turns then the heater output
>>>will be wrong - maybe very wrong.
>
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Received on Sun Mar 12 17:06:51 2006