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Messages - gil

Pages: [1] 2 3 ... 170
1
Technical Corner / New Steve Weber Project.
« on: October 17, 2017, 05:38:10 AM »
From the AT_Sprint Yahoo group:

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I just ordered proto boards for a SSB reversion of the Soda Pop, tentatively named "slop bucket".

It's based on the Survivor SSB rig design, but with a Si5351 VFO and of course, mostly SMT parts. It is slightly bigger then the soda pop board, but not by much.(92 x 100 mm). It includes a VOX circuit so it can be connected directly to a sound card for digital mode operation.  I decided not to board mount the jacks this time for two reasons. 1) to keep the board smaller then 100 x 100 mm and 2) it allows more flexibility of enclosure choices. 

My plan is to initially offer just 50 kits, all of the same band and only to US address. I know this will disappoint a lot of people, but it makes my life easier.  ETA is before Christmas.

The main reason for offering just one band is because the IF frequency is different depending on the band to keep unwanted mixer products well away from the operating frequency.

A 20 M version will use a 9 MHz IF and a 40M version will use a 11.059 MHz IF. The 20M version will likely require a more expensive PA then the 40M version to get decent power output and that could impact the price of the kit, but probably not by too much. The price will be in the ball park of the Soda Pop kit.

Gil.

3
Batteries & Solar / Re: Man Portable Off-Grid Power for Amateur Radio
« on: October 17, 2017, 04:48:45 AM »
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Where are we going to find fresh 18650 batteries, when the entire region is scrounging for them!?

I like 18650s. They have a good capacity and can easily be found for free. You would of course have your stock ready before a situation develops, not count on finding them in the field, although there are plenty of laptops floating around. I also use them for flashlights and USB power banks. Those 38120s look very interesting for more current-hungry radios. A pack of seven would make a great Clansman battery, and give the PRC-320, which only draws 175mA, a lot of operating time, but at $32 per cell, ouch! I have a 7S LIPO but if one cell goes bad the whole pack is gone; no such problem with separate cells. The trick is of course is being able to charge them, and Julian, you are the expert here :) I'm following in your footsteps.

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Can you, walk out the door, even only 100 feet away and be on the air in HF in five minutes?
Excellent question Ray; I can fortunately answer yes.
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Are you able to recharge your own station in the wild?
Yep, that too, tough I do not have a backup solar panel nor a way to recharge batteries via mechanical means, wind or muscle driven...

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Forget ARRL Field Day and other contests: this is about sustained communication with zero infrastructure, not giant motor homes, generators and photo-ops during a weekend.

As I've said before, Field Day is not about getting out of the shack but getting the shack out... Every Field Day should start with a five-mile hike carrying your equipment to the field. We would see very different gear then...

Gil.

4
Net Activity / Re: Radio Vacation and Update.
« on: October 05, 2017, 09:34:35 PM »
The difficulty here is that max gross weight is 450kg, 991Lbs... So the plane would have to be very very light... No alternator, battery, starter, no electrics, light fabric, and all the tricks possible to lose weight, including myself! The biggest issue is that a lighter engine would stick too far out. A Ford model A weighs around 265Lbs.
Empty weight is presumably 625Lbs with Ford-A, but people end-up with 650 to 750Lbs. I would have to end at around 590Lbs empty with a lighter engine and longer nose... Quite possible.

Gil.

5
Net Activity / Re: Radio Vacation and Update.
« on: October 05, 2017, 06:39:16 PM »
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It's going to take so much time to build it that it will prevent you from doing all sorts of other things that cost money

LOL, you might be right :o

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What engine will you use?

No idea! It's really going to be an easy-peasy project... VW is too light and not enough torque, unless you use a reduction drive. It'll fly, but not well and the nose would be very long. A good ol' Continental A65 would work. If I'm rich by then, a Verner five-cylinder radial would be awesome. Ultralights in France are limited to 60kW (80hp), so choices will be limited. The Ford A is great but that big radiator in front of the cockpits is a no-no in my book. If I want a bigger engine I can always redo my pilot's license (my US license isn't accepted here) and register it as an experimental, though ultralight would be better since there is no medical and it could matter in a decade or two...

What's interesting is that a 40hp Ford model A works as well if not better than an 80hp VW... Food for thought... Drag is a b-tch... You need a large diameter prop on that plane, and a direct drive VW isn't going to swing it...

Anyway, changes of me actually getting to the engine installation phase are slim... We'll see in a few years... If I can get a boat I will be gone for 2-3 years in the middle of it, so... It's all conjecture at this point. I only bought the plans...

There sure would be a dipole in that wing, as long cross-country flights at 70mph can be, well, long... CW too, no less.

Gil.

6
Net Activity / Re: Radio Vacation and Update.
« on: October 05, 2017, 02:21:56 PM »
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everybody needs something to dump their money into

I know I'll eternally be broke, but kicking the bucket with more than $100 on my account would be worse :o

Gil.

7
Net Activity / Re: Radio Vacation and Update.
« on: October 05, 2017, 11:38:52 AM »
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I assume you've checked out the International Pietenpol Association.

Sure did! It will be a background project... My primary objective is to get a sailboat again, but having something to do with my spare time, on top of radio, will be nice. Maybe I'll even finish it someday if I'm not too old by then ::)

Gil.

8
Net Activity / Re: Radio Vacation and Update.
« on: October 05, 2017, 08:36:20 AM »
Oh boy, what am I getting into :o

Gil.

9
Technical Corner / Re: New QRP Labs 5W CW Transceiver Kit.
« on: October 05, 2017, 05:19:50 AM »
Thanks Bob! I still don't have mine. It's been 25 days since shipping...

Gil.

10
Batteries & Solar / Re: MY CB GO BOX
« on: October 03, 2017, 12:11:24 PM »
Most CB antennas are verticals. You are using a horizontally polarised antenna... There is about a 20db loss for cross-polarization.... That might explain...
Gil

Sent from my SM-G928F using Tapatalk


11
Batteries & Solar / Re: MY CB GO BOX
« on: October 02, 2017, 02:46:36 PM »
Looks good!

I wish more people would think of portable operations instead of staying in the shack!
Now we need videos of you operating it in the field  ;)

Gil.

12
VHF and Above / England on 2m SSB.
« on: October 02, 2017, 02:44:27 PM »

Gil.

13
Morse Code / Re: Morse Code en Provence.
« on: October 02, 2017, 06:36:36 AM »
Thanks Jon  :)

14
Technical Corner / Re: New QRP Labs 5W CW Transceiver Kit.
« on: September 26, 2017, 02:28:08 PM »
Christmas... 2019...
Gil

Sent from my SM-G928F using Tapatalk


15
Technical Corner / Re: New QRP Labs 5W CW Transceiver Kit.
« on: September 26, 2017, 10:35:51 AM »
Mine shipped too but nothing so far...
Gil

Sent from my SM-G928F using Tapatalk


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