Hi Mike
I like your SSPA !
How much attention did you pay to its "health and safety" ? The necessary
foolproof control and monitoring circuits are putting me off at present.
Regards
John G4ZTR
_____
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Mike Tubby
Sent: 04 February 2013 19:27
To: Col. Paul E. Cater
Cc: Amps reflector; Dan Levin
Subject: Re: [Amps] 50v power supply options for SS amps
Paul,
If you're building an SSPA for 6m or 2m then also consider the F1JRD
designs using the MRFE6VP61K25H - its rated at lightly more power than
the MRF6VP11KH and is more robust.
See www.rfham.com (warning: website in French) - "Kit parts for SSPA
amplifier".
Hans, PE1CKK's, 2KW amplifier using the Dutch RF Shop kits lasted about
20 minutes in the IARU Region 1 144MHz Contest last September and went
bang... meanwhile, on this side of the North Sea (and facing him), our
2KW SSPA only finished build and test the night before was hurriedly
thrown together on a gerden table in the tent and performed flawlessly
for the whole event:
http://www.tubby.org/sept_trophy_2012/MO2Z0827.jpg
Mike
On 04/02/2013 14:01, Col. Paul E. Cater wrote:
> Thanks for the video Mike-----I did end up with an HP in the lower end
> of that price range. I didn't really consider doing two boards but
> the kits from NL that PE1CKK used look nice. A couple dividers and
> I'm off.
>
> I've never done a SS amp before. But, now the devices are in
> attractive power levels and compare favorably to the cost of tubes.
> Size is another improvement.
>
> The next one might be for HF and I'll toss that 80 pound transformer,
> box of caps, and other stuff I have collected.
>
> Regards,
> Paul
> WD8OSU
>
> .
>
>
> On Mon, Feb 4, 2013 at 2:14 AM, Mike Tubby <mike@tubby.org
> <mailto:mike@tubby.org>> wrote:
>
>
> Eltek 'rectifiers' do appear to work well but they are designed for
> charging 48V (4 x 12V) battery banks at typically 53-57V and may not
> have the regulation you would expect.
>
> I am using Meanwell/Sunpower RSP-3000-48 supplies as Future
> Electronics
> (USA) had them priced ridiculously cheap a while back and they were
> under half the price that they were in Europe!
>
> Another alternative to consider is the HP 48V 2950W power supply
> for the
> HP Proliant BL class servers (HP part number 406424-001) - try
> searching Ebay for "HP 48V 2950W" - they often sell for $30-99 plus
> shipping.
>
> You can see a HP supply being used in PE1CKK's 2KW 144MHz amp video on
> Youtube:
>
> http://www.youtube.com/watch?v=io3KeGlJmCs
>
>
> Mike G8TIC
>
>
>
> On 03/02/2013 21:57, Dan Levin wrote:
> > Paul,
> >
> > My sense is that you are better of buying a used 50v supply from the
> > telco equipment industry than you are trying to build one. I
> > especially like the Valere rectifiers, like this one:
> >
> >
>
http://www.ebay.com/itm/Eltek-Valere-H2000A1-2000W-Hot-Pluggable-AC-DC-Power
-Supply-Rectifier-Module-/130844461639?pt=LH_DefaultDomain_0
<http://www.ebay.com/itm/Eltek-Valere-H2000A1-2000W-Hot-Pluggable-AC-DC-Powe
r-Supply-Rectifier-Module-/130844461639?pt=LH_DefaultDomain_0&hash=item1e76f
00a47> &hash=item1e76f00a47
> >
> > $119 for a serious, professional grade, 48v x 40 amp power supply is
> > pretty hard to beat. These guys have excellent output power
> quality,
> > and for a bonus can be controlled via a digital interface if you
> feel
> > like it.
> >
> >
> > Good luck,
> >
> > ***dan, K6IF
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com <mailto:Amps@contesting.com>
> > http://lists.contesting.com/mailman/listinfo/amps
>
>
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