48 volt PS
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I need to buy a 48 VDC power supply for a project that requires that voltage – and possibly along with a voltage divider to power the K3. One suggestion I’ve received is the MeanWell SE 600-48. The online reviews are good, noting only high fan noise, which can be fixed by replacing the fan with a Vantac Stealth. But I haven’t seen anything about RFI.
Anyone know this PS who could say something about the RFI question? Anyone have other suggestions for 48 VDC and at least 12 amps? Thanks, as always, Ted, KN1CBR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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I use a Meanwell power supply for my amp. It causes very little RFI on my K3S which is readily suppressed with ferrites.
John WA1EAZ > On Dec 7, 2017, at 12:57 PM, Dauer, Edward <[hidden email]> wrote: > > I need to buy a 48 VDC power supply for a project that requires that voltage – and possibly along with a voltage divider to power the K3. One suggestion I’ve received is the MeanWell SE 600-48. The online reviews are good, noting only high fan noise, which can be fixed by replacing the fan with a Vantac Stealth. But I haven’t seen anything about RFI. > > Anyone know this PS who could say something about the RFI question? Anyone have other suggestions for 48 VDC and at least 12 amps? > > Thanks, as always, > > Ted, KN1CBR > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Feel free Ted,
John WA1EAZ > On Dec 7, 2017, at 1:13 PM, John Stengrevics <[hidden email]> wrote: > > I use a Meanwell power supply for my amp. It causes very little RFI on my K3S which is readily suppressed with ferrites. > > John > WA1EAZ > >> On Dec 7, 2017, at 12:57 PM, Dauer, Edward <[hidden email]> wrote: >> >> I need to buy a 48 VDC power supply for a project that requires that voltage – and possibly along with a voltage divider to power the K3. One suggestion I’ve received is the MeanWell SE 600-48. The online reviews are good, noting only high fan noise, which can be fixed by replacing the fan with a Vantac Stealth. But I haven’t seen anything about RFI. >> >> Anyone know this PS who could say something about the RFI question? Anyone have other suggestions for 48 VDC and at least 12 amps? >> >> Thanks, as always, >> >> Ted, KN1CBR >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by stengrevics
Curious, I have a Meanwell RSP-3000-12
Anyone repair them? Frank KG9H > On Dec 7, 2017, at 12:13 PM, John Stengrevics <[hidden email]> wrote: > > I use a Meanwell power supply for my amp. It causes very little RFI on my K3S which is readily suppressed with ferrites. > > John > WA1EAZ > >> On Dec 7, 2017, at 12:57 PM, Dauer, Edward <[hidden email]> wrote: >> >> I need to buy a 48 VDC power supply for a project that requires that voltage – and possibly along with a voltage divider to power the K3. One suggestion I’ve received is the MeanWell SE 600-48. The online reviews are good, noting only high fan noise, which can be fixed by replacing the fan with a Vantac Stealth. But I haven’t seen anything about RFI. >> >> Anyone know this PS who could say something about the RFI question? Anyone have other suggestions for 48 VDC and at least 12 amps? >> >> Thanks, as always, >> >> Ted, KN1CBR >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Edward A. Dauer
Hi Ed,
As a reference point. Elecraft uses a MeanWell RSP-3000-48 in the KPA1500 power supply as shown on the FCC site. Does not show any extra filtering added. Terminals to rear panel connector directly. That is an endorsement of at least that model in my opinion. 73, Bob K2TK ex KN2TKR (1956) & K2TKR On 12/7/2017 12:57 PM, Dauer, Edward wrote: > I need to buy a 48 VDC power supply for a project that requires that voltage – and possibly along with a voltage divider to power the K3. One suggestion I’ve received is the MeanWell SE 600-48. The online reviews are good, noting only high fan noise, which can be fixed by replacing the fan with a Vantac Stealth. But I haven’t seen anything about RFI. > > Anyone know this PS who could say something about the RFI question? Anyone have other suggestions for 48 VDC and at least 12 amps? > > Thanks, as always, > > Ted, KN1CBR > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Edward A. Dauer
Ted.
Best to box the PSU and silence the fan with sound deadening material without affecting airflow. In effect, creating a "silencer" for the air inlet, and maybe outlet. For that sort of power level 500W and above, and the small size of those PSU's, the cooling is critical for a long life. So, the gutsy but noisy fan is there for a reason. Replace it with a quieter one if you must, but don't compromise the airflow. As to RFI. All SMPS's create it, some more than others, by design. It can be filtered of course, but to do that properly will also cost a fair bit. Voltage divider? Just use a dedicated 12 (13.8V) PSU for the K3. You then have redundancy for when the 48V supply quits at some point. If you must, one of the common "Telecom" DC/DC converters, (48 to 15V, and a linear post reg) to get your K3 supply. But, make sure you know which side of any such DC/DC converter is common, if not isolated. You may be (unpleasantly) surprised! Remember the KISS principle. 73 Dave G0WBX. On 09/12/17 19:47, [hidden email] wrote: > I need to buy a 48 VDC power supply for a project that requires that voltage ? and possibly along with a voltage divider to power the K3. One suggestion I?ve received is the MeanWell SE 600-48. The online reviews are good, noting only high fan noise, which can be fixed by replacing the fan with a Vantac Stealth. But I haven?t seen anything about RFI. > > Anyone know this PS who could say something about the RFI question? Anyone have other suggestions for 48 VDC and at least 12 amps? > > Thanks, as always, > > Ted, KN1CBR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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