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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Fri 18, 2019 7:24 pm 
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Joined: Jun Sun 15, 2014 5:37 pm
Posts: 317
Tube Radio wrote:
maximum voltage for the TCXO is not exceeded.



To nitpick, that looks like just a simple crystal oscillator, not one that's temperature compensated.

And no, that has no relevance to your comment, which would apply to anything that's designed to run off 5V.

Michael


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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Fri 18, 2019 10:38 pm 
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Location: Warner Robins, GA
Could be just regular oscillators.


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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Fri 18, 2019 11:05 pm 
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Location: Cheney Washington
I used a simple oscillator for this experiment.


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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Fri 18, 2019 11:10 pm 
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Tube Radio wrote:
Could be just regular oscillators.


Yes it is.
Image


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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Sat 19, 2019 2:02 am 
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I would think 9 volts would be a bit much as I'm sure the transformer doesn't drop 4 volts.


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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Sat 19, 2019 3:44 am 
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Location: Omak,wa,usa
Hello Paws,
what great idea hope everything works out for you .

super cool thou and I have one sstran3000 transmitter .
Well azenithnut,
I took used that trainer and remember the circuit I still have my heathkit trainer book I was thinking of scoping ebay for one those old trainers .

Anyway Wazz ,
I like your idea what unit are you using ?

Sincerely Rich


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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Sat 19, 2019 3:42 pm 
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Version of LM386 xmitt. Will transmit 50ft or more.

viewtopic.php?f=12&t=345493

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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Sat 19, 2019 7:43 pm 
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Location: Dayton Ohio
radiorich wrote:
Well azenithnut,
I took used that trainer and remember the circuit I still have my heathkit trainer book I was thinking of scoping ebay for one those old trainers .

Sincerely Rich


Oh you took that course too? We followed it exactly except for the Microprocessor course. We switched to Intel rather than follow Heathkit with Motorola.

This is the circuit trainer we used.

-Steve


Attachments:
heathkit-trainer.jpg
heathkit-trainer.jpg [ 539.1 KiB | Viewed 1405 times ]

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 Post subject: Re: Working on a AM transmitter prototype
PostPosted: Oct Thu 31, 2019 10:28 am 
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Location: Cheney Washington
Here is the completed unit. I was able to put approx 70hrs of old broadcasts on the player with room to spare. I hooked the leads directly to the Antenna/Ground connections. Came in load and clear.

Attachment:
IMG_20191031_011650.jpg
IMG_20191031_011650.jpg [ 800.15 KiB | Viewed 1316 times ]


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