The picture of the AT-60 shows no heatsinking. The AT-58 has a large heatsink. The description of the AT-75 doesn't have a picture, so there is no way to establish similarity.
Considering applying half-rated power to an attenuator or load of known specification, measuring temperature rise on its heatsink, and then applying increasing power to the unknown attenuator until the same temperature is reached. Any comments on that approach? Ken Javor Phone: (256) 650-5261 > From: Ted Eckert <[email protected]> > Date: Fri, 28 Sep 2012 00:56:11 +0000 > To: "[email protected]" <[email protected]> > Conversation: Calling all old-timers > Subject: RE: Calling all old-timers > > Here is a specification sheet for the Empire Devices AT-60. I can't state > whether it would have similar ratings to the AT-58, but it may provide some > guidance. > http://www.aef.se/Mat-Testteknik/Typkatalog/M2433/M2433-103010.pdf > > Ted Eckert > Compliance Engineer > Microsoft Corporation > [email protected] > > The opinions expressed are my own and do not necessarily reflect those of my > employer. > > -----Original Message----- > From: Ken Javor [mailto:[email protected]] > Sent: Thursday, September 27, 2012 5:38 PM > To: [email protected] > Subject: Re: Calling all old-timers > > I may have posed my question unclearly. > > What is the power handling capability of an Empire Devices AT-58 6 dB > attenuator, properly inserted in a circuit? > > The balance of the discussion was just there to pique any old memories. > > Ken Javor > Phone: (256) 650-5261 > > >> From: Derek Walton <[email protected]> >> Date: Thu, 27 Sep 2012 18:23:26 -0500 >> To: "[email protected]" <[email protected]> >> Cc: Ken Javor <[email protected]>, "[email protected]" >> <[email protected]> >> Subject: Re: Calling all old-timers >> >> Perhaps. To help isolation It has several sections. Only the output >> end has lower power parts.... >> >> Derek >> >> Sent from my iPhone >> >> On Sep 27, 2012, at 6:12 PM, [email protected] wrote: >> >>> While the schematic may be a pi or T network, internally it may be a >>> series of pi or T networks, each section of which dissipates a given >>> amount of wattage. This means the input pi/T might attenuate say only >>> a few tenths of a dB, while the last pi/T also dissipates about the >>> same amount of power, but does so by having a much larger >>> attenuation. Turn things around, and this power distribution plan is totally >>> shot. >>> >>> Alternatively, it is a single pi or T network, with a high power >>> resistor on the input side, and a lower power resistor on the output side. >>> >>> Cheers, >>> >>> Donald Borowski >>> EMC Compliance Engineer >>> Schweitzer Engineering Labs >>> Pullman, WA, USA >>> >>> >>> >>> From: Ken Javor <[email protected]> >>> To: "[email protected]" <[email protected]> >>> Date: 09/27/2012 03:25 PM >>> Subject: Calling all old-timers >>> Sent by: [email protected] >>> >>> >>> >>> Make that "older-timers." >>> >>> Just purchased an Empire Devices AT-58 6 dB attenuator. It's big - >>> looks like it ought to handle 100 Watts, but there is no indication >>> of the power handling capability. >>> >>> Input and output are marked, and only the input side is supposed to >>> face the high power source, so the rating of internal resistors is >>> based on individual power dissipation - schematically these things >>> are symmetrical so the power rating is the only reason for marking >>> input and output. >>> >>> Any leads on this? >>> >>> 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://listserv.ieee.org/request/user-guide.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://listserv.ieee.org/request/user-guide.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://listserv.ieee.org/request/user-guide.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://listserv.ieee.org/request/user-guide.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]>
