[RTTY] AL-1200 arcing during QRO RTTYcontesting

[Barry]

I'll second the motion on the Acom. I've used it for CQWW RTTY, 
48 hours, full power. While the room gets pretty hot (which is why I 
operated low power the last 2 years), the amp stays cool! One nice 
thing about the Acom is you can remote the amp from the control 
unit. I might try that in the future and put the amp itself outside the 
shack.
I used to own an Alpha 77Dx (sold it when I bought the Acom) and 
it, too, barely got warm in a RTTY contest, full power.
Barry W2UP

On 5 Oct 01, alsopb wrote:

> 
> 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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> List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
> Trylon Titan towers, coax, hardline and more. Also check out our self
> supporting towers up to 100 feet for under $1500!!  http://www.anwireless.com
> 
> -----
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--
Barry Kutner, W2UP              Internet: w2up@mindspring.com
Newtown, PA                     Frankford Radio Club