[Elecraft] K3: KPA500 on a generator?

[Johnny Siu]

The main supply in Hong Kong is 220v 50Hz.

 cheers, 


Johnny VR2XMC 




________________________________
寄件人﹕ Jeff Cochrane - VK4BOF <vk4bof.elecraft at gmail.com>
收件人﹕ Ian White GM3SEK <gm3sek at ifwtech.co.uk>; elecraft at mailman.qth.net
傳送日期﹕ 2011/2/23 (三) 4:46:58 PM
主題： Re: [Elecraft] FW: FW: K3: KPA500 on a generator?

I am absolutely sure that there are indeed KPA-500's operating with either 50hz 
mains or generator usage at this time.
I do not for a minute believe that Wayne, Eric and the gang at Elecraft have not 
thought of 50Hz operation.
(After all, 50Hz mains is far more prevalent than 60Hz mains in the world)
See 
http://en.wikipedia.org/wiki/File:Weltkarte_der_Netzspannungen_und_Netzfrequenzen.svg
 for an interesting pic.

73 de

Jeff Cochrane - VK4BOF
Innisfail, QLD, Australia
Elecraft K3# 4257 + PR6 - K144XV = multiband goodness!

  ----- Original Message ----- 
  From: Ian White GM3SEK 
  To: elecraft at mailman.qth.net 
  Sent: Wednesday, February 23, 2011 6:29 PM
  Subject: Re: [Elecraft] FW: FW: K3: KPA500 on a generator?


  Jim Brown wrote:
  >On 2/19/2011 7:32 AM, Ian White GM3SEK wrote:
  >> Very few US manufacturers are capable of in-house testing on 50Hz, so
  >> it's good to see that Elecraft have placed a KPA500 with Brendan.
  >
  >//I can assure you that Elecraft engineers are smart enough to design
  >for 50 Hz power.
  >

  Of course; but smart companies like Elecraft will also take good care to 
  *verify* their designs under actual conditions of use.

  Operation from a 50Hz supply will push almost every aspect of a design 
  much closer to its margins, especially the temperature rise (which is 
  notoriously difficult to predict). Far too often, we in Europe have 
  literally had our fingers burned!

  Jim himself has carried out a very important thermal stress test of the 
  KPA500, operating for many hours in an RTTY contest at a high CQ:RX 
  ratio. Those results ("stayed cool as a cucumber") are very 
  encouraging... so please can we look forward to a repeat on 50Hz, where 
  everything will get hotter?


  -- 

  73 from Ian GM3SEK
  http://www.ifwtech.co.uk/g3sek
  ______________________________________________________________
  Elecraft mailing list
  Home: http://mailman.qth.net/mailman/listinfo/elecraft
  Help: http://mailman.qth.net/mmfaq.htm
  Post: mailto:Elecraft at mailman.qth.net

  This list hosted by: http://www.qsl.net
  Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html