Re: 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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Received on Mon Mar 13 07:22:34 2006