Amps
[Top] [All Lists]

Re: [Amps] Low ESR caps for amp power supplies

To: W0UN -- John Brosnahan <shr@swtexas.net>
Subject: Re: [Amps] Low ESR caps for amp power supplies
From: R L <r@somis.org>
Date: Sun, 30 Apr 2006 07:50:19 -0700
List-post: <mailto:amps@contesting.com>
John --  We currently stock a 560uF, 450v, 3.5 A-rms, 35mm diameter x  
51mm length, 105ºC capacitor that is made by Matsushita, the same  
company that makes the MOF resistors we use in our parasitic  
suppressor retrofit kits, and the 500V RF reed relay that we use in  
our high speed switching kits.
    I recently purchased 200 of these capacitors in order to get them  
at a reasonable price.  If you purchase 60-units, I will sell them  
for 8% more than we paid for them + shipping.  .

Rich, AG6K

On Apr 30, 2006, at 6:24 AM, W0UN -- John Brosnahan wrote:

> I am about to build a half-dozen power supplies for assorted
> amps for 160M and the VHF bands.  With a need for approximately
> 60 electrolytic caps for the 6 power supplies it is imperative that
> I find some bargains.
>
> I am a bit concerned about surplus caps because of the materials
> problems that the Taiwan manufacturers had a few years ago --
> especially on the low-ESR aluminum electrolytics.  But I would
> buy surplus if I felt confident the caps were not on any list for
> problems.
>
> What I am looking for is something like 470 uF at 450 volts at
> 105 deg C, rated for use in filtering (low ESR).   Has anyone
> already done the research to find the best value out there?
> Either for new or surplus caps?
>
> Actual capacitance is not critical,  if they are 220 uF caps, for
> instance, I will just parallel two strings.
>
> How about equalizing resistors, say 3 Watt ones.  Any bargains
> out there?
>
> Thanks  -- John  W0UN
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>

_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps

<Prev in Thread] Current Thread [Next in Thread>