[Amps] Palstar DL5K 5KW load

[PA3DUV]

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 at juno.com>
To: <amps at 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
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