It's worth trying, since a custom design is ruled out. In my case, they
found two of the transformers on the shelf of 'old products'. They had a
smaller product in the current catalogue, but, as in your case, my
budget wouldn't run to that.
I didn't know that US marines run on batteries. I assumed it was hydrazine.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-06-09 19:48, Ken Javor wrote:
Re: [PSES] Does anyone make this filter? I have done exactly that in
the past (well, not the beer part) when working a mil or aerospace
program, because I know that the filter manufacturer can price the lot
to where they can get back their NRE on development.
But here the customer is expecting to pay maybe $5 US max for a
filter, and this product being a marine battery charger, is not going
to be high volume, so I don’t feel comfortable asking for a custom design.
I understand that they may have some design they worked on that isn’t
in the catalog, and that may be worth pursuing.
Ken Javor
Phone: (256) 650-5261
------------------------------------------------------------------------
*From: *John Woodgate <[email protected]>
*Reply-To: *John Woodgate <[email protected]>
*Date: *Sun, 9 Jun 2019 19:37:14 +0100
*To: *<[email protected]>
*Subject: *Re: [PSES] Does anyone make this filter?
You could try contacting the filter manufacturers directly, if you
haven't done that already. Maybe one of the smaller, 'try harder'
outfits would be more willing to help. Many manufacturers have
products that they made in the past but don't advertise. I won out on
a costly transformer that way; admittedly it was 'negotiated' over
beer, but resulted in a $100 part for free.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk <http://www.woodjohn.uk>
<http://www.woodjohn.uk>
Rayleigh, Essex UK
On 2019-06-09 18:31, Ken Javor wrote:
Re: [PSES] Does anyone make this filter? To all who responded,
I was really hoping for a bulkhead mount type pi or T-type filter
but using a cm choke, and feedthrough caps, or similar, to get
really high performance at high frequencies, coupled with minimal
size.
Never found anything like that, and as I said, this is a
commercial application and not terribly large production, so a
custom filter is not realistic.
Thanks to all who responded.
Ken Javor
Phone: (256) 650-5261
On Wed, Jun 5, 2019 at 11:21 PM Ken Javor
<[email protected]> <mailto:[email protected]>
<mailto:[email protected]> wrote:
Working a little outside my experience area.
Trying to help someone meet FCC Class A RE limit. Device is
an off-line battery charger, failing RE 30 – 200 MHz.
Conducted emissions on output leads (24 / 36 Vdc @ up to 25 A)
are too high to meet RE limit. Trying to snub sources is not
my thing and they are not interested in that at his point. I
am trying to contain the noise. Plan is to provide a metal
bulkhead with a bulkhead-mount common mode only filter rated
for 50 Vdc and over 25 A, but filtering only at and above 30 MHz.
Trouble is, I can’t find such a filter off-the-shelf with
commercial rating and commercial price.
Can anyone suggest a vendor of such?
Thank you,
Ken Javor
Phone: (256) 650-5261
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