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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Tue 03, 2017 3:07 am 
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Location: Groveland MA
Today I replaced the antenna with one from an AA5, and after a little tweaking of the trimmer, I have very good reception across the band without having an additional wire added.

I don't know what radio the old antenna was from, but clearly not the best match for my radio.

Russ

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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Wed 04, 2017 1:21 am 
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radioalfa wrote:
Today I replaced the antenna with one from an AA5, and after a little tweaking of the trimmer, I have very good reception across the band without having an additional wire added.

I don't know what radio the old antenna was from, but clearly not the best match for my radio.

Russ

In cases like this a cheat tool(inductance meter) is helpful... Can measure working antenna, then add or subtract as necessary to match to your useage... As you've found not all are same... Of course it can be done without meter, just gives a accurate starting direction...

BTW, great work, nice project you've built...


Tom


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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Thu 05, 2017 2:09 pm 
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Location: Groveland MA
35Z5 wrote:
BTW, great work, nice project you've built... Tom


Thanks Tom! Looking forward to more experimentation now that I have it working.

Russ

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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Thu 05, 2017 3:50 pm 
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Joined: Jan Fri 06, 2012 8:47 pm
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What does this remind me of.... Oh yeah.
Attachment:
city4.jpg
city4.jpg [ 96.07 KiB | Viewed 825 times ]
Spock: Captain, you're asking me to work with equipment which is hardly very far ahead of stone knives and bearskins.

Job well done.

Curtis Eickerman

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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Sat 07, 2017 2:25 pm 
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Location: Groveland MA
Eickerman wrote:
Job well done.


Thank you Curtis, after having built (and troubleshot) the radio my understanding of radio theory has greatly improved. Now I am solidly at the beginner level :)

Russ

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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Sat 07, 2017 6:15 pm 
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radioalfa wrote:
Now I am solidly at the beginner level :)
Aren't we all? :D

Curtis Eickerman

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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Mon 16, 2017 5:58 am 
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Location: Los Angeles
Pbpix wrote:
BikenSwim wrote:
Sal Brisindi wrote:
Looking good! In the future you can use octal relay socket to make swapping out components easier to experiment with.

Sal


Still time to do it, Mouser has them http://www.mouser.com/search/ProductDet ... ey70-464-1

Nice socket.
But why were these made for use with relays?
Why couldn't the relay just plug into any regular octal socket and be wired up like a tube?

What am I missing?



Because most electricianests don't know how to solder. :wink:

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 Post subject: Re: My AA5 Homebrew / Trainer
PostPosted: Jan Tue 17, 2017 12:58 am 
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Joined: Sep Mon 16, 2013 2:42 am
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Location: Tucson, Arizona U.S.A.
Pbpix wrote:
BikenSwim wrote:
Sal Brisindi wrote:
Looking good! In the future you can use octal relay socket to make swapping out components easier to experiment with.

Sal


Still time to do it, Mouser has them http://www.mouser.com/search/ProductDet ... ey70-464-1

Nice socket.
But why were these made for use with relays?
Why couldn't the relay just plug into any regular octal socket and be wired up like a tube?

What am I missing?

Those sockets are mainly for mounting on DIN rails. They only have screw holes for the occasional user who has a panel without rails. There is no chassis in these applications; everything mounts on a panel and all the wiring and components are on the front side. That way when the service tech opens the cabinet, everything is right in front of him and he doesn't have to deal with going around the back. This is how industrial equipment is usually built.

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