In the Netherlands 400 watt is the legal limit on HF.
All PA contest stations stay to this limit, also the ones with 3 hole GU74
amps.
Since I do not participate in contests I use the twin GU84B for heating
applications exclusively.
Actually on the lower HF bands 6 dB makes the difference.
Cheers, Dick
PA3DUV
----- Original Message -----
From: "Don Havlicek" <n8de@thepoint.net>
To: "PA3DUV" <pa3duv@planet.nl>
Cc: "Harold B. Mandel" <ka1xo@juno.com>; <amps@contesting.com>
Sent: Wednesday, August 31, 2005 4:51 PM
Subject: Re: [Amps] Palstar DL5K 5KW load
>6 Kw output?
> Hmmmmmmm
> Wish we had that opportunity in the USA, but who needs 6 db?
> Don
> N8DE
>
> PA3DUV wrote:
>> However, there are some minor flaws in the design of the DL5K.
>>
>> First the long silver plated wire from the UHF connector to the resistors
>> is hanging on the solder joint of the UHF connector. The cheap rubber
>> grommet in the directional coupler box provides no support at all. I have
>> machined a teflon support bushing to replace the grommet which supports
>> this long lead. Also I have bolted the directional coupler box to the
>> chassis in order to remove strain from the broken solder connection to
>> the UHF plug.
>>
>> The DL5K works just fine with the 6 kW output from my 2 x GU84 amplifier.
>> The fan kicks in after approx. 20 seconds and a nice flow of hot air
>> heats my shack in the wintertime. Together with the air flow through the
>> GU 84 plate coolers I do not need to fire up the wood burner in the
>> shack.
>>
>> Cheers, Dick
>> PA3DUV
>>
>>
>> ----- Original Message -----
>> From: "Harold B. Mandel" <ka1xo@juno.com>
>> To: <amps@contesting.com>
>> Sent: Thursday, August 18, 2005 12:21 AM
>> Subject: [Amps] Palstar DL5K 5KW load
>>
>>
>>
>>>When opening up the Palstar DL5K dummy load
>>>the owner can spot a ceramic capacitor at one end of
>>>the two load resistors.
>>>
>>>As well, the input line goes through a metal box that serves as
>>>the pickup for the relative wattmeter on the front panel.
>>>
>>>While never approaching the 5KW limit I have seen some
>>>reflected energy from this device at the legal limit area and
>>>wonder if any of you might have encountered this as well.
>>>
>>>I went so far as to swap coax jumpers, etc., to eliminate
>>>cable glitches and the effect followed.
>>>
>>>Hal Mandel/W4HBM
>>>_______________________________________________
>>>Amps mailing list
>>>Amps@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>> _______________________________________________
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>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
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