[Amps] Big HV Supply
km1h at jeremy.qozzy.com
Wed Aug 8 10:44:54 EDT 2018
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
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.
----- Original Message -----
From: "Jim Thomson" <jim.thom at telus.net>
To: <amps at 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 at jeremy.qozzy.com>
> To: "John Keating" <john.keating at outlook.com>, "Jim"
> <jimw7ry at gmail.com>, "'Herbert Schoenbohm'"
> <herbert.schoenbohm at gmail.com>, "'Amps group'" <amps at contesting.com>
> Subject: Re: [Amps] Big HV Supply
> <All the big Amp Supply transformers were Dahl, some had a tapped HV
> <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
> <honor on that band any longer.
> ## 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
> 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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