[TowerTalk] Re: [RTTY] AL-1200 arcing during QRO RTTYcontesting

[alsopb]

ACOM 2000a handles 1500w RTTY with no sweat-- but a lot of heat. 
Brought room temp up to 90+ degrees with windows open, outside air
temp in the 70's and a ceiling fan.

No fooling mother nature.  That what ain't RF is heat.

73 de Brian/K3KO

Frank Norton KB8XU wrote:
> 
> FOR VERY LOW HOURS "AMP SUPPLY" AMPLIFIER---I JUST POSTED AN LK- 8877 ON
> QTH.COM THIS AM.  HAD SEVERAL CALLS ALREADY.  AMP SUPPLY made some very
> heavy duty product.
> 
> 73 de kb8xu Frank
> 
> PS I don't usually post this type of thing but there seemed to be a
> question about good amps for RTTY or ? Tnx!
> 
> At 11:26 AM 10/5/2001, you wrote:
> 
> >John, my two cents.  Over the years on RTTY I used an NCL-2000 at 600 watts
> >out no problems...3 - 4 db down from 1500 watts out.  For many years used
> >Amp Supply linears called LK-550.  Had two of them both running 1300-1500
> >watts out with good sucess.  Have two Alpha 76CA's (three 8874's) and not
> >tried them...would be curious if they are being used by anyone at 1500 watts
> >output for rtty contesting.  (still have a LK550 here on shelf...they use
> >three 3-500's and 1.75 amp hypersil xfmr  the xfmr weighs more than most 1.5
> >kw amps...sixty pounds!)  Kept it just in case the urge returns to do some
> >rtty contesting again.
> >
> >John...would recommend looking for an LK 550 as rf deck very rugged with
> >similar bandswitch to what Alpha uses and very heavy power supply.  Just
> >last week sold one of them to a fellow in Utah.  Wish I had known you were
> >looking for a good stable hi-powered rtty amp as these units handled rtty
> >contesting hi power for me very well.  Only probably I ever had was
> >occassional arcing of load capacitor which was probably my fault for
> >mistuning, forgeting to change bands/antennas  in middle of night and so
> >forth.  I kept a couple of loading capacitors on the shelf just in case and
> >did replace once or twice during contests.
> >
> >Van, K7VS (wa7fab)
> 
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