Re: [Elecraft_K3] K3 Voltage Drop
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I just adjusted the voltage on my RS35 ... easy - very intuitive once you removed the top covers
On Wed, Apr 10, 2013 at 8:12 PM, Richard Fjeld <rpfjeld@...>
As I recall, the Astron 35M has an adjustment pot for
voltage, but it is on the bottom of the board with very little clearance.
It is the reason why I have not increased my voltage. I keep
hearing Murphy saying; "If it ain't broke,
don't fix it."
----- Original Message -----
Sent: Wednesday, April 10, 2013 12:53
Subject: RE: [Elecraft_K3] K3 Voltage
your Astron is adjustable internally. If not a search of the Internet will
review where to add a cal pot.
Excellent ! Now I need an adjustable PS. No
Thanks for the response. Case closed.
James I waited to let others to answer
your question but I’m not seeing a real answer.
Yes, your readings are normal, well
almost. The K3 does not measure the voltage at the input terminal and I think
0.2v difference is normal and it does not change much from transmit to
receive. However your cable drop is based upon IR losses and it will drop on
Your numbers illustrate how easily
power can be lost in a low voltage, high current situation. Furthermore these
systems deteriorate very quickly and require monitoring to make sure some
terminal doesn’t go bad. It’s simple to do. Just touch your power terminals
after you have been in a long QSO. If you find a warm one
Check your input voltage
specifications for the K3 and you will find you may increase the input voltage
well about 14.0V. It may seem counterintuitive but your K3 will run cooler if
you increase voltage. Before you increase anything make sure a higher input
voltage setting on your power supply is compatible with your other 12 volt
I never noticed this before but wonder if this is
normal. I am using an Astron RS-35M.
measure 13.88 volts at the terminals. A small amount of possible meter
K3 Power Pole connector I measure 13.39 Volts while transmitting 65
Volt Meter shows 12.7 Volts.
cable is about of10 feet long of stranded
Cleaned the fuse holders and replaced the
is a 0.49 voltage drop.
initially shows 13.8 Volts but when transmitting it reads 12.7
is a 0.69 Volt drop from the 13.39 Volts read at the Power Pole connector at
this normal when transmitting to see the Volt Meter in the K3 to show a
works just fine getting good output.
explained things well. I appreciate any and all
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