Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: Prev 1 [2]   Go Down
  Print  
Author Topic: Operating beyond 1.5KW  (Read 1166 times)
K1DA
Member

Posts: 498




Ignore
« Reply #15 on: September 15, 2014, 09:51:15 AM »

So, these 8K and 5K Henry's , 77SX's, LK800TNY's, 3CX3000 homebrews, etc. are only running 1500 watts. Yeah, I believe that.
   ROFLMAO  Smiley
Logged
KD0REQ
Member

Posts: 928




Ignore
« Reply #16 on: Yesterday at 01:10:05 PM »

yeah, 1500 watts.

in the exciter.
Logged
G3RZP
Member

Posts: 4557




Ignore
« Reply #17 on: Yesterday at 01:59:10 PM »

Back in the 1960s, the input power level in the UK on 160 was 10 watts DC input. One guy in east London got his "ten watts" to six 813 tubes with 2500 volts on the plates. That's 300 watts for the filaments alone! He was running around 3kW input.............and he never got caught.
Logged
KE2TR
Member

Posts: 153




Ignore
« Reply #18 on: Yesterday at 02:21:08 PM »

"Running far beyond "legal limit" is routine during big contests or dx pile ups, for a fair number of stations in the thick of it.
It's one of the dirty little secrets of those activities. "
Now that's funny, most contesters use an amp with a little bit of headroom such as the likes of an AL1500/Acom2000A/Alpha 77DX,8410,9500,87A/ORO 3500 and the list goes on. Most of these amps will do around the 2.2K mark but when driven at 1500W will last the who weekend without issues, were the contest station have the edge is in the antenna farm which turns that 1500W amp going into mega stacks of antennas for one band which gives you an ERP (effective radiated power)of between 25-30Kw out of the antenna system and that's the game changer, its all about the antenna and what layer of DX station they can hear in which more modest station cant plus the DX is attracted to a strong signal on the band that stick out were other are not heard.
But when it comes to DXing that's were the big amps are used to make that one call for that new one and when you look at these guys that snag that rare station 1st its 50% antenna and 50% more power. Its some of the big DX guns who break the power laws way before any contester does but they have to get on top of the Honnor Roll (IMO more like the Toilet Roll), now that's a big friggin joke.
Logged
G3RZP
Member

Posts: 4557




Ignore
« Reply #19 on: Today at 01:16:12 AM »

Some of the big contesting groups here can run up to 100kW + erp on 2 metres, even with a legal 400 watts at the antenna stack....One hell of a lot of aluminium in the air, though! But with a suitable portable site to operate from on the East Coast, they will be running German stations right down through the Ruhr and beyond to Bavaria as if it was 20 metres!
Logged
Pages: Prev 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!