Comments for K8GP Grid Pirates Contest Group

Comment on K8GP to operate in ARRL June VHF 2011 contest by Jim Stitt

Jim Stitt — Sat, 18 Jun 2011 14:51:22 +0000

Trying to contact Terry K8MN. Jim Stitt WA8ONQ towerjimsk@gmail.com

Comment on HP 3000W Power Supply Info by Thomas Moliere DL7AV

Thomas Moliere DL7AV — Fri, 08 Oct 2010 17:00:29 +0000

Hi, I sent you a reply some days ago. No interest in a professional statement?
73 Thomas DL7AV, AL7IB

Comment on HP 3000W Power Supply Info by Thomas Moliere DL7AV

Thomas Moliere DL7AV — Mon, 13 Sep 2010 17:36:47 +0000

HP Compaq 3000W PSU just purchased, my measurements

Output voltage 51.7 V (originally)

20 pin connector at output side, voltages related to the 0 V output
Row 2 pin 3: +4.3 V pin 5: 0 V
Row 4 pin 3: +4.0 V pin 5: 0 V
For Output voltage ON Pins 3 and 5 connected in both rows, then +60 mV.
There is no galvanic connection between pins 5 and the 0 V DC output. But n-channel MOSFETs can easily be used for the switching.

Tests with 1 A load current (51 W DC):
Output ON delay (when Pins connected): 5 ms
Output OFF delay: about 250 ms (output capacitor discharge, e-function)
Switching frequency:
Main: 50 kHz
Secondary: 385 kHz and 500 kHz
Output ripple: 70 mV peak (on 1 A load), mainly 50 kHz
Mains current (with clamp meter):
310 mA no jumpers, blower running
640 mA with 1 A load (35% efficiency)
Sorry I have no load resistance or PA for higher currents
Adjusting the output voltage:
This is possible through the potentiometer on the secondary board near the aluminium cooler, it is hidden by silicon glue. Turning clockwise: 50.4 V output. I would like to have 46 to 48 V for more safety for the PA transistors but this will be difficult.

73, Tom DL7AV

Comment on HP 3000W Power Supply Info by Peter

Peter — Tue, 31 Aug 2010 10:14:27 +0000

Thanks for the pictures of that HP power supply.
It helped me to get this PSU up and running.
Nice and cheap PSU. It is quiet on the radio. Couldn’t find spuries and noise while using it.

73, Peter

Comment on W4XP by hamidi

hamidi — Sun, 04 Jul 2010 05:52:02 +0000

hi sir,
im hamidi from fire rescue academy malaysia kuala kubu bharu selangor
u come to fram i think last year.
i heard u also ham radio so that why i contct,
just to get some help about receiving antnna for 146mhz

Comment on June 2010 by jeff millar

jeff millar — Fri, 25 Jun 2010 14:53:12 +0000

Very nice antennas…I’m a bit jealous of the 2M array.

You had a lot of teething problems, but expect good things from you in the future.

good luck!

jeff, wa1hco

Comment on June 2010 by Dave Olean

Dave Olean — Fri, 25 Jun 2010 14:08:05 +0000

How do you guys maintain the energy levels and have all those fantastic operators? This time around, hardly anyone even showed up here in Maine. K1BX was the only guy who showed up wanting to work people. He operated six meters only. We went QRT there from about midnight to 10 AM Sunday morning. (Art went home to sleep) WW1M and I spent the weekend working on hooking stuff up for future contests, but seeing your recap of June makes me want to take my hat off and salute a bunch of hard workers. No pain.. No gain. Wow what a bunch of work! I am impressed.
73

Dave K1WHS

Comment on June 2010 by K1JX

K1JX — Fri, 25 Jun 2010 01:29:00 +0000

You guys really are masochists to the extreme!

Comment on June 2010 by Dan Evans, K9ZF

Dan Evans, K9ZF — Thu, 24 Jun 2010 21:27:05 +0000

Very impressive!

I thought I was the only one Murphy was picking on:) No fun for me this time around, my Rover truck was broke down.

Good luck with the station improvements. It will be hard to log K8GP and not write in FM08!

73
Dan
–
Amateur Radio Emergency Service, Clark County Indiana. EM78el
K9ZF /R no budget Rover ***QRP-l #1269 Check out the Rover Resource Page at:
List Administrator for: InHam+grid-loc+ham-books
Ask me how to join the Indiana Ham Mailing list!

Comment on June 2010 by John N2HMM

John N2HMM — Thu, 24 Jun 2010 17:33:40 +0000

Hello, just as an FYI.

N2NK has now adopted the Sussex County ARC call of W2LV which we’ve been using for the last couple of years now. The trustee of N2NK is no longer a part of our merry band.

Congratulations on your effort and see you in September.

John
N2HMM