[Amps] power limiting in 8410 amps?

[Jim Thomson]

##  I realize that.  Just don’t try and operate the L4B  at  1200-1300  watts  out on CW..with B+  in the ssb mode.  The cooling is marginal at best,
and the outborad  B+  supply is not up to the task.
All my xcvrs put out  200+  watts, so no big deal to drive anything.   IMD  from a 200 watt  xcvr, on ssb mode..when  running 100  w  pep out, is 
very low, non issue. 

Jim   VE7RF 




From: Russ Williams 
Sent: Monday, November 5, 2018 1:56 PM
To: amps at contesting.com ; Jim Thomson 
Subject: Re: [Amps] power limiting in 8410 amps?

Jim, my response was a little toungue-in-cheek.  I know that I will never see 1200W out of my L4B with 40 watts of drive.  My point was to be happy with what the amp does produce when reasonably driven.  "Care and Feeding of Power Grid Tubes" comes to mind.

Cheers.
Russ KW6Tango


On Sunday, November 4, 2018, 7:41:30 AM PST, Jim Thomson <jim.thom at telus.net> wrote: 


Message: 2

Date: Fri, 2 Nov 2018 18:35:30 +0000 (UTC)

From: Russ Williams <hrd998cc at yahoo.com>

To: Amps at contesting.com, Steve Bookout <steve at nr4m.com>

Subject: Re: [Amps] power limiting in 8410 amps?


< Steve.? I would thrilled to get 1200 watts out of my L4B with 40 watts drive . 


<Russ KW6T


##  40 watts to drive an L4B to  1200 watts.... not gonna happen anytime soon, not with

2500 vdc under load..and  800 ma plate current.  I get 1290w pep out of my  4 x L4Bs 

on 80m, with calibrated watt meters..and abt  100w pep  drive.  


#(Text deleted)


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