[Waverley ARS] Power Supply for ICOM 718

[Brad Crowe]

Hi Adam, welcome to the WARS e-mail reflector

There is a nice Jaycar 20 amp and a 30 amp linear power supply at 
this link.  We have the 30 amp one of these down at the club under 
the main bench.
http://www.jaycar.com.au/productView.asp?ID=MP3099&CATID=27&keywords=&SPECIAL=&form=CAT&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=381

The Jaycar MP3078 switch mode is attractively priced and is extremely 
convenient due to its lighter weight.  I had one of these for a day 
once and found it produced so much RF hash it was unusable on HF 
bands so I returned it.  However another member has one and found 
theirs to be quiet on HF frequencies.

There has been a lot written about switch mode power supplies and 
their problems on HF, some certainly seem to be worse than 
others.  Switchmode power supplies can't all be bad though, as it 
appears the Icom one you mention would be suitable for HF.

The Dick Smith one you mention is a favorite amongst the ham 
community...they seem to go and go and it is sometimes useful to be 
able to change the voltage setting (not possible on the switchmodes 
you nominated).  It is also a nice feature to see how much current 
you are drawing.  I use one of these and have had it running for 
years without any trouble, although it doesn't get much heavy duty use.

The Altronics M8260 looks nice, but I think you will find it not up 
to the job when you want to run 100 watts.  For 100 watts, I think 
you will be best served by a PSU capable of running 20amp continuous.

A linear PSU is relatively simple electronically compared to 
switchmode PSUs.  Remember 2 switchmode PSUs failed down at the club 
on the weekend.

Anyone else have opinions on PSUs.

73 Brad VK2CEC



At 04:53 PM 26/02/2007, Adam Carmichael wrote:
>Hello all,
>
>First I might just shout out to those I haven't met yet; I'm a new
>member, and just passed the foundation exams this weekend that the club
>kindly held :) Look forward to meeting you on the air and in person soon!
>
>
>So I have my first HF radio on order (718, I also have a VX-7RB for
>VHF/UHF portable), and I've been looking at power supplies. Here's a
>couple I've shortlisted (I plan on upgrading my license, but not
>planning on upgrading a PSU!):
>
>Jaycar MP3078 $100 (current favourite; switchmode, just concerned with
>ripple and RFI)
>
>DSE D3800 $200 (designed for HF users)
>http://www.dse.com.au/cgi-bin/dse.storefront/en/product/D3800%0A
>
>Altronics M8260 (switchmode, 17mV ripple)
>
>ICOM PS125 $200 (as new from someone at VKHam)
>
>
>
>I'm just wondering if anybody has had any experience with these power
>supplies (I didn't check eham.net as these are largely Aussie specific
>models), or if they have any for sale not listed on the VKHAM classifieds.
>
>
>Thanks in advance,
>
>
>Adam (VK2FNRD [I hope])
>
>--
>Adam Carmichael
>p: +61 415 37 1990
>w: http://carneeki.net
>e: carneeki at carneeki.net
>i: 2207644
>
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