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Author Topic: Switching power supply  (Read 1116 times)
VE2WFB
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Posts: 30




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« on: October 11, 2018, 09:54:30 AM »

Hi,

is the Astron SS-30M the best choice if I want I ligth/quiet/relialable power supply for my IC-7300?

73,
VE2WFB
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W8JX
Member

Posts: 13268




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« Reply #1 on: October 11, 2018, 11:53:08 AM »

Hi,

is the Astron SS-30M the best choice if I want I ligth/quiet/relialable power supply for my IC-7300?

73,
VE2WFB

I have used one for many years with no issues with 3 different rigs. So will tell you that you need a 35amp door stop linear supply but you do not. Also when looking at rigs current ratings, those are worst case at 15% over 13.8v, not a 13.8 volts. Typically they draw about 15% LESS than rated draw in specs that some take as absolute values. Why do they rate it that way? Well if they gave true nominal draw at 13.8, someone would bitch if it drew more than that but who will complain if it draws less and makes rated output?
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--------------------------------------
Ham since 1969....  Old School 20wpm REAL Extra Class..
SWMAN
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Posts: 1277




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« Reply #2 on: October 11, 2018, 12:18:23 PM »

 I have had one for 14 years now that I use with my TS 570. It still purrs like a little kitty. I like it a lot, no problems or noise at all. Go for it.
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VE7REN
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Posts: 617




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« Reply #3 on: October 12, 2018, 03:40:29 AM »

I recomend the samlex 1235 .samlex is a great brand,great support. they run quiet and are very well filteres. I own both Astron and samlex,but find the astrons fan pitch louder when the fan comes on.. both are great supplies. I went from linear rs 35a astrons a few years ago,to switching supplies. no problem. more efficient,smaller.
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K8AXW
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Posts: 6996




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« Reply #4 on: October 12, 2018, 10:51:27 AM »

I've used the Samlex 1235 for many years without any kind of problem.
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A Pessimist is Never Disappointed!
WA3SKN
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Posts: 6886




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« Reply #5 on: October 12, 2018, 03:30:38 PM »

Well, "best" is feuding words, but there is nothing wrong or bad with that supply.  You are buying a name brand, and both parts and help are available if needed.
I like the SEC 1235M also because I like meters, but they are not lit... a minor annoyance and resolve-able.
And, yes, you can get cheaper supplies.
73s.

-Mike.
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NR4C
Member

Posts: 496




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« Reply #6 on: October 13, 2018, 09:14:18 PM »

The POWERWERX SS-30 is also a good choice.

...bc. nr4c
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NZ4ZN
Member

Posts: 158




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« Reply #7 on: October 14, 2018, 04:17:55 AM »

The POWERWERX SS-30 is also a good choice.

...bc. nr4c
I have one of these as a backup/auxiliary unit for my VHF amplifier and it's been fine.
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KM6RWB
Member

Posts: 48




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« Reply #8 on: October 14, 2018, 04:13:24 PM »

Greetings- I got this
http://www.megawattpowersupplies.com/
and it is quiet and works like a champ- I am not connected with this company- but I have to say the guy that runs it is a great person to deal with and the price is great
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VE3WI
Member

Posts: 52




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« Reply #9 on: October 15, 2018, 10:33:56 AM »

I also got a MegaWatt PS (S-400-12) and have been very satisfied.  It's open design, so I mounted it in a Hammond box. I also replaced the internal soldered-in fuse with a jumper & mounted a standard fuseholder on the box.  It is quiet (audio & RF).  I have lugged it around to FD and other portable ops, and it has worked well for several years.

73
Dave, VE3WI
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KM1H
Member

Posts: 4722




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« Reply #10 on: October 15, 2018, 11:50:47 AM »

Im still using Linear Astrons up to 75W I bought used 25-30 years ago and never a problem. They will likely be obsolete by the time they fail and I'll have to decide to either repair myself or go with a switcher Roll Eyes

I did have to replace all 4 electrolytics used on a 12 year old Whirlpool dishwasher control board and suspect the switcher PS beat on them pretty hard. It was either that or spend ~ $350 for a replacement board which certainly was NOT going to happen.

Carl
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