Gotta love that dry Brit humor :-) Ken Javor Phone: (256) 650-5261
From: John Woodgate <[email protected]> Date: Sun, 9 Jun 2019 19:59:14 +0100 To: Ken Javor <[email protected]>, <[email protected]> Subject: Re: [PSES] Does anyone make this filter? 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 <http://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 don¹t feel comfortable asking for a custom design. > > I understand that they may have some design they worked on that isn¹t in the > catalog, and that may be worth pursuing. > > Ken Javor > Phone: (256) 650-5261 > > > > > > From: John Woodgate <[email protected]> <mailto:[email protected]> > Reply-To: John Woodgate <[email protected]> <mailto:[email protected]> > Date: Sun, 9 Jun 2019 19:37:14 +0100 > To: <[email protected]> <mailto:[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 can¹t 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 >>> >>> - >>> ---------------------------------------------------------------- >>> >>> This message is from the IEEE Product Safety Engineering Society emc-pstc >>> discussion list. To post a message to the list, send your e-mail to >>> <[email protected]> >>> >>> All emc-pstc postings are archived and searchable on the web at: >>> http://www.ieee-pses.org/emc-pstc.html >>> >>> Attachments are not permitted but the IEEE PSES Online Communities site at >>> http://product-compliance.oc.ieee.org/ can be used for graphics (in >>> well-used formats), large files, etc. >>> >>> Website: http://www.ieee-pses.org/ >>> Instructions: http://www.ieee-pses.org/list.html (including how to >>> unsubscribe) <http://www.ieee-pses.org/list.html> >>> List rules: http://www.ieee-pses.org/listrules.html >>> >>> For help, send mail to the list administrators: >>> Scott Douglas <[email protected]> >>> Mike Cantwell <[email protected]> >>> >>> For policy questions, send mail to: >>> Jim Bacher <[email protected]> >>> David Heald <[email protected]> >>> >>> >> >> - >> ---------------------------------------------------------------- >> >> >> This message is from the IEEE Product Safety Engineering Society emc-pstc >> discussion list. To post a message to the list, send your e-mail to >> <[email protected]> <mailto:[email protected]> >> >> >> All emc-pstc postings are archived and searchable on the web at: >> http://www.ieee-pses.org/emc-pstc.html >> >> >> Attachments are not permitted but the IEEE PSES Online Communities site at >> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >> formats), large files, etc. >> >> >> Website: http://www.ieee-pses.org/ >> Instructions: http://www.ieee-pses.org/list.html (including how to >> unsubscribe) <http://www.ieee-pses.org/list.html> >> List rules: http://www.ieee-pses.org/listrules.html >> >> >> For help, send mail to the list administrators: >> Scott Douglas <[email protected]> <mailto:[email protected]> >> Mike Cantwell <[email protected]> <mailto:[email protected]> >> >> >> For policy questions, send mail to: >> Jim Bacher <[email protected]> <mailto:[email protected]> >> David Heald <[email protected]> <mailto:[email protected]> >> >> > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected]> <mailto:[email protected]> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> <mailto:[email protected]> > Mike Cantwell <[email protected]> <mailto:[email protected]> > > For policy questions, send mail to: > Jim Bacher <[email protected]> <mailto:[email protected]> > David Heald <[email protected]> <mailto:[email protected]> > > - > ---------------------------------------------------------------- > > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected]> > > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> > Mike Cantwell <[email protected]> > > > For policy questions, send mail to: > Jim Bacher <[email protected]> > David Heald <[email protected]> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
