>
>
>-----Original Message-----
>From: Ian White, G3SEK <G3SEK@ifwtech.com>
>To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
>Date: 16 May 2001 13:04
>Subject: Re: [AMPS] Voltage Doublers
>
>
>>
>>Glenn McNeil wrote:
>>>
>>>A few questions about voltage doublers. I'm building a single tube 4CX250R
>for
>>>70cm using a voltage doubler
>>>supply. This is my first attempt at FWD supplies.
>>>
>>>I have a transformer with about 750vac secondary, 12ohms dc resistance.
>I'm
>>>planning on using IN5408 diodes and
>>>a string of electro's.
>>>
>>In one word, DON'T. The secondary resistance of the transformer -
>>combined with the effects of primary resistance and diode on-resistance,
>>which you also need to factor in - will ruin the voltage regulation.
>Are you being a bit harsh on the transformer here, Ian? 12 ohms strikes me
>as quite low.
? good point, Steve.
>...
cheers
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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