Re: 6100 HV transformer in an Amplifone HV PCB

I now get aB+voltage of 181v !! I tried adjusting the frequency of the 555
and I can adjust B+ from around 150 to 200 so its looking good. I also found
the 7924 was fried by the RED so I will replace that and try it in the game.
finger crossed

----- Original Message -----
From: "simon hanlon" <simonjhanlon@btopenworld.com>
To: <vectorlist@vectorlist.org>
Sent: Monday, March 13, 2006 12:22 PM
Subject: Re: VECTOR: 6100 HV transformer in an Amplifone HV PCB

> Ok I replaced the Bu406d last night as the old RED killed it. This morning
> I drilled some holes in the Amplifone HV PCB, cut all the unsed pins off
> the WG transformer and soldered it in place. I wired the HV pcb up to 4x
> 12v nicads in a +24 -24 setup. I have a 12v bulb across the heater output
> and I'm getting 6v AC, I have focus, screen voltages and also Anode
> voltage but the B+ is missing. I need to add a 10uf 350v cap across the
> b+diode and the -24v supply and that should work also. I am going to try
> it on the tube later and see if it gives a good picture.
>
> ----- Original Message -----
> From: "simon hanlon" <simonjhanlon@btopenworld.com>
> To: <vectorlist@vectorlist.org>
> Sent: Sunday, March 12, 2006 10:06 PM
> Subject: Re: VECTOR: 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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>>
>>
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>
>
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Received on Mon Mar 13 08:36:22 2006