Alpha, Ameritron, Amp Supply, and others all use 220-270uF caps. There is no
reason for 400 unless the goal is to put more stress on the step start.
Excessive C also requires a lot more consideration to how the energy storage
is going to be handled under a HV fault condition.
Carl
KM1H
----- Original Message -----
From: "Pete Soper" <pete@soper.us>
To: <amps@contesting.com>
Sent: Thursday, November 24, 2011 2:07 PM
Subject: Re: [Amps] best deal for Mallory caps?
> Thanks to KM1H and K0UYA for the advice. The form factor of the stock
> caps for the Titan is the killer: very long and very narrow compared to
> the "usual" for this capacity and voltage. I'm confident I could make a
> safe outboard "capacitor box" bolted to the side of the current PS to
> allow more available/affordable capacitors, but I have to weigh all the
> factors, and $29 each at Newark may be a better choice. I don't know if
> 270uf/8 is sufficient vs 400uf/8 for an amp that can put out 1.5kw with
> the figurative pinky finger of one hand. So I'm sure I want to stay with
> 400uf per capacitor, while also paying close attention to temperature
> and rated life specs, ESR, etc. This is why I asked about a better deal
> for *the specific Mallory (CD) capacitors* before exploring unknown
> territory.
>
> The Digikey price for these caps is $46 each, if they had them in stock,
> which they don't. Mouser does have 15 in stock at $81 each. Other
> suppliers I've found all over the planet have prices around $35 or more.
>
> Anyway, I wanted to make sure there isn't a golden supplier hiding out.
>
> Regards,
> Pete AD4L
>
>
> On 11/24/2011 11:26 AM, Carl wrote:
>> Ameritron has a good price on their caps which are 270uF which with 8
>> is sufficient for good filtering. The new ones are half the height but
>> still the computer grade type...about $13 iffn I remember.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- From: "Pete Soper" <pete@soper.us>
>> To: <amps@contesting.com>
>> Sent: Wednesday, November 23, 2011 3:53 PM
>> Subject: [Amps] best deal for Mallory caps?
>>
>>
>>> I need several replacement caps for my Ten-Tec Titan 725, Mallory
>>> CGS401T450R5L (long/slim 400mf 450vdc/85c). Newark wants $29 each. Is
>>> there a better deal available?
>>>
>>> Thanks,
>>> Pete AD4L
>>>
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>
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