My test data indicates that my K2 / 100 is happy with the Gamma power
supply.
The K2/100 is specified to run ok down to 11 volts. The K2 is more
tolerant than many rigs when run at supply voltages down to 12 volts
minus line drop.
As I stated, the Gamma does run 100 watt cw with the K2/100.
Leigh L. Klotz Jr wrote:
With 5 farads of filtering it's a probably a bit quieter than the MFJ.
The Q of a 5 Farad capacitor is not good. It will carry the peak
current from a SSB transmitter but it will not control RF noise. This
comes from the high frequency chopping of the input 120
Good point Karl! I don't have an MFJ to compare but I will bring it
along to AmTech day or Pacificon to test. It fits in my front pocket.
73,
Leigh/WA5ZNU
On Sun, 1 Oct 2006 4:39 am, Karl Larsen wrote:
Leigh L. Klotz Jr wrote:
With 5 farads of filtering it's a probably a bit quieter than the
I just did a noise test and found either no noise or almost no noise on
all bands.
I hooked the Gamma Research supply to my K2, along with the internal
battery.
I disconnected all other connections (RS232, key, antenna).
I set the mode to USB and the Preamp=ON and spot checked the bands from
companion for my K2/100 dual box setup.
The fact that it is only 1.25 pounds with cable and so small opens up
lots of portable uses.
The input is 85 to 240 volts AC.
John KH7T
Subject:
[Elecraft] Gamma Research Very Small Switching Power Supply
From:
[EMAIL PROTECTED]
Date:
Sat, 30 Sep 2006 19:10
The voltage on my meter is 13.65 with no load.
With K2/100 set for 50 watts out the voltage drops to 13.3 with a string
of 15 wpm dashes.
At 75 watts it drops to 12.75 volts.
At 100 watts it drops to 12.2 volts.
Due to the large capacitance, it takes several seconds to drop to the
levels
Just got my October issue of CQ and saw a review of this very small power
supply made by Gamma Research, model HPS-1a. It is 3.37 X 1.55 X 5.25 inches,
rated at 13.8 VDC, 22 amps at 25% duty cycle and 5 amps continuous, and
weighing
only 1.25 lbs. If you do not get CQ, then the company's web
[EMAIL PROTECTED] wrote:
Just got my October issue of CQ and saw a review of this very small power
supply made by Gamma Research, model HPS-1a. It is 3.37 X 1.55 X 5.25 inches,
rated at 13.8 VDC, 22 amps at 25% duty cycle and 5 amps continuous, and weighing
only 1.25 lbs. If you do not get
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