Amps
[Top] [All Lists]

[AMPS] Transformer Current ratings

To: <amps@contesting.com>
Subject: [AMPS] Transformer Current ratings
From: 2@vc.net (2)
Date: Sat, 15 Dec 2001 14:45:52 -0800
>
>I remember this - it was done by a guy with a dutch last name. It was a 2 
>KVA supply, around 2 KV. It was the size of a shoe box and weighed 10 or 15 
>lbs. I believe it was included just one year in the ARRL Handbook - 
>possibly mid- to- late 80's.
>
>The only problem I see with these SMPS is that the parts count is high, and 
>they're far more complex than the simple brute-force linear supplies we use 
>for amps. I think the trade-off of high weight/volume and low parts count 
>against low weigh/volume but high complexity is what has kept SMPS out of 
>the amateur linear amp scene.
>
//  Amen, Phil.  The "Plywood Box" amplifier used a Dahl 68-lb Hipersil 
transformer, a 0.1lb rectifier and a 9lb. filter C bank.  That works out 
to about 5.5lbs of  anode PS for each kW PEP out on SSB.  

cheers
>
>At 07:33 PM 12/15/2001 +0000, you wrote:
>
>
>>There was a design for a high voltage (~ 2 kV) SMPS in an old issue of QEX 
>>- the
>>ARRL's technical journal. I don't know if it is possible to search (or 
perhaps
>>even find the article online at the ARRL web site). I can't recall the exact
>>power level, but it was only a couple of kW or so. This was about 5 or 
>>possibly
>>10 years ago.
>>
>>I did contemplate trying to design a larger (10 kW) SMPS, but came to the
>>conclusion it would be a nice thing to do if my employer was paying for the
>>inevitable blown up components. One can't go too far wrong with a simple
>>transformer/rectifier, but I think building a switch mode supply is a 
>>different
>>matter altogether.
>>--
>>Dr. David Kirkby Ph.D,
>>email: drkirkby@ntlworld.com
>>former email address: davek@medphys.ucl.ac.uk
>>web page: http://www.david-kirkby.co.uk/
>>Amateur radio callsign: G8WRB
>>
>>--
>>FAQ on WWW:               http://www.contesting.com/FAQ/amps
>>Submissions:              amps@contesting.com
>>Administrative requests:  amps-REQUEST@contesting.com
>>Problems:                 owner-amps@contesting.com
>
>
>
>--
>FAQ on WWW:               http://www.contesting.com/FAQ/amps
>Submissions:              amps@contesting.com
>Administrative requests:  amps-REQUEST@contesting.com
>Problems:                 owner-amps@contesting.com
>
>


-  R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.  
end


--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com


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