Re: [Amps] Big HV Supply

["Carl" <km1h@jeremy.qozzy.com>]

The LK-550 runs three 3-500's and cooling would likely limit power as it is 
a fan. Ive had them up to 2200W or so with 150W drive....nothing to brag 
about tho!
Ive built several LK-800's for 6M EME that do a solid 5 out without 
complaining and going to a good EBM fan.
On HF I dont know how well the bandswitch will hold up over time and the 
fixec C used needs beefing up.
Another thing I dont know is tube life at that power but money isnt 
important to some.
BTW what is a full output YC-156 going for these days? It came from Tom, 
WD8??? ages ago. Also have a filament xfmr and one of those UK sockets all 
set up for good air flow. I'll never get around to building another amp and 
dont need QRO here.
Carl




----- Original Message ----- 
From: "Jim Thomson" <jim.thom@telus.net>
To: <amps@contesting.com>
Sent: Monday, August 06, 2018 12:29 PM
Subject: [Amps] Big HV Supply


> Date: Sun, 5 Aug 2018 15:46:55 -0400
> From: "Carl" <km1h@jeremy.qozzy.com>
> To: "John Keating" <john.keating@outlook.com>, "Jim"
> <jimw7ry@gmail.com>, "'Herbert Schoenbohm'"
> <herbert.schoenbohm@gmail.com>, "'Amps group'" <amps@contesting.com>
> Subject: Re: [Amps] Big HV Supply
>
> <All the big Amp Supply transformers were Dahl, some had a tapped HV 
> winding
> <for the LK-550 and LK-800 and others were custom non advertised for the
> <3CPX800A7 LK-800
>
> <You would be surprised at how many went to 160M "big guns". There is 
> little
> <honor on that band any longer.
>
> <Carl
>
> ##  How much power can u get out of a LK-550  or  LK-800..with a big xfmr 
> ?
> I dont even know what tube  or how many many tubes were in those amps.
>
> What are we talking abt here, like  3 x 3cpx800a7s   putting out 3.5 kw 
> or what ?
> I wouldnt get wound up abt a lousy  3 – 4db esp on 160m band.  IMO, they 
> should
> increase the limit on 160m.  Thats  one band where some extra.. oomph 
> would work,
> esp with sky high noise levels.   Noise level with typ ssb rx filter band 
> widths typ  results
> in high noise levels... making life a bitch on 160m  ssb.
>
> Jim   VE7RF
>
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