[time-nuts] Replacement A9 boards for the HP 5065A

[Azelio Boriani]

The part number BFC234421475, on <http://www.wima.com.ua/BFC234421475>
seems to be a Philips product, 2500 available, for 49.28 UAH
(Ukrainian Hryvnia, that is 1.77 USD). A mysterious capacitor...

On Sun, Feb 25, 2018 at 12:35 PM, Charles Steinmetz
<csteinmetz at yandex.com> wrote:
> Interesting.  I'm inclined to say I stand corrected, BUT:  (i) as Mark
> noted, the datasheet link points to the datasheet for Vishay FC Series HF
> thin-film resistors [which are really excellent low-reactance T/F resistors,
> if you need any]; (ii) I cannot find any reference to PC caps on the
> Vishay/BC web site; and (iii) other distributors do not list this cap (or
> any Vishay/BC PC caps, for that matter).
>
> I did discover Electronic Concepts (ECI) (https://www.ecicaps.com/), who
> claim to make their own PC film and do seem to supply three series of PC
> caps.  They seem mainly to make them to order, but they have small
> quantities of some parts in stock.  Prices are by quotation, so I don't know
> what they charge.  I assume they are pretty pricey, and if they run out of
> an in-stock cap there may be a minimum order to get more.
>
> So, I do stand corrected.
>
> All that said, PP and PPS are the best choices for the A9 integrator
> project.
>
> Best regards,
>
> Charles
>
>
>
> On 2/24/2018 9:35 PM, Mark Sims wrote:
>>
>> For a while, all makers of polycarbonate caps got out of the business.
>> The US government had to step in and get involved... apparently they are
>> used in a lot of explody thingies, etc.
>>
>> Mouser shows one (around $7 for a 4.7 uF cap):
>>
>> https://www.mouser.com/ProductDetail/Vishay-BC-Components/BFC234421475?qs=XPb5zkzE6%252bBS9mv3hRFZcw%3d%3d
>>
>> But, the datasheet link goes to a resistor...
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