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| Real-Time Amateur Satellite Tracking Maps | |
Oct 13, 2009 - 11:49 PM - by moleculo |
We've added a new feature to the site: real-time amateur satellite tracking maps. While there are several great pieces of software and a few sites that offer this functionality, there weren't any that gave you a quick visual overview of where all of the main satellites are. I found myself clicking way too many times to see which satellites were coming into range, so I created a page for the site that shows all of the main satellites at a glance. It also shows the primary use frequencies.
Check it out: http://www.worldwidedx.com/sats.php.
You'll also notice that there is a new "Satellite Maps" link in the navigation bar above, as well as a new "Ham Satellite Maps" link on the homepage in the Site Navigation section. If we're missing any important satellites, or if you spot any errors, please let us know!
Enjoy!
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6 Replies | | Homebrew 572B amp | |
Oct 04, 2009 - 6:42 AM - by QRN |
Well I just got off work this morning and thought I would start this thread before catching a nap.As discussed in the other thread,I plan to build a 4 tube 572B amp I have a cabinet that needs some paint and the first decent day I get next week it shall receive that paint.Black hammertone on the outside and a flat textured black on the inside. The front panel will be either hammertone gray or just regular gray.Here is the cabinet.Note the 12 inch ruler for scale.
Here is the loading cap I was going to use. It is 2000 pF but is too long and quite hard to modify. It has ceramic insulators holding it together and that makes it pretty hard to shorten. I have some other caps suitable for loading caps in an amp this size so it's time to find out where I stashed all my goodies.
Updates in a few days after I have a chance to get to it. I work Monday and Tuesday and then off for nine days,back for two more and off another six so I hope to get a decent start on this project.
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13 Replies | | HF homebrew tube amp photo build | |
Sep 30, 2009 - 2:19 PM - by Radio Tech |
Been digging through info for about 6 months now.
Next project, HF all band amplifier.
Took me a while to decide on what tube to use. So going to use the 811a since a have a shelf full of them. Now to decide on how many to use. Seems 4 was the magic number but maybe more. Have to do the math.
I got this huge black ugly case I need to do something with.
Pics to follow as this comes along.
May be requesting folks to check their junk boxes! 
Below is the chassis I am going to use. For the last 20 years it has been a power supply ranging from 5 to 800 volts. Time to give it a new face and use it for something more usful. It this case, an HF Amplifier.
It is a rather large enough chassis to handle the project.
 ... [Read More] | |
38 Replies | | So you want to learn more about radio repair | |
Oct 25, 2009 - 6:56 PM - by Radio Tech | Scope
Years ago I started off in electronics with nothing more that a volt meter. Analog at that. I now have a well stock repair shop going with some decent equipment. But took years to accumulate. Back then there was no internet to look stuff up on. No great forums like this one to go on and ask how something works, or where to find a part. Well, at least there were local places to find parts! Everything was trial and error. At least for me.
What I am hoping to do in this thread is share with you some of the tricks of radio repair. And maybe some of the other techs will jump in and add a few things. Reason I am doing this is that I get pm's and emails from cb'rs and new hams everyday asking different things about their radios. Just today I received one from the Netherlands asking about an article I wrote a few years ago on another forum.
Also by reading the forums there are many folks that are trying to repair their own radios. These are the different folks than just the ones that want plug and play. So don't worry... [Read More] | |
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