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... transmitter

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richy_64

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Messages: 198

New PostCreated: 2006-03-13, 08:52 PM CET  Subject: ... transmitter  print  print thread  recommend Reply with Quotation  

Hello, i returned from my practical semester had found some time for hobby, i really had withdrawal

So, what might this be?



Simple, isn´t ist

The theoretically output power is about ~20dBm, unfortunately i just reaches ~50m Still have to work on it...

Greetings,
Richard



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"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."


[edited: 2006-03-17, 10:23 PM CET by richy_64]
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kleiner-onkel

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Messages: 412
Location: South-West-G


New PostCreated: 2006-03-21, 11:24 PM CET  Subject: Re: ... transmitter  print  recommend Reply with Quotation  

Hi

try looking after bgy33 <-hybrid

or

mrf238 <-rf-fet

... to boost up...

nice circuit...!!! homebrew...?
tv tuner... with open if ..?

(if=Intermediate Frequency)

gr.chris

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kleiner-onkel

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Messages: 412
Location: South-West-G


New PostCreated: 2006-03-21, 11:25 PM CET  Subject: Re: ... transmitter  print  recommend Reply with Quotation  

what's the final station...?

cly10...?

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richy_64

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Messages: 198

New PostCreated: 2006-03-23, 07:27 PM CET  Subject: Re: ... transmitter  print  recommend Reply with Quotation  

Hi Chris...
No, it´s a standard video/audio modulator out of an old satellite receiver.

The design depends on the work i did in my practical semester, I´ve learned a lot of GHz-Design :-)

The output stage is a RF2317 (i was allowed to take some souveniers )




_______________________

"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."


[edited: 2006-10-09, 04:32 PM CET by richy_64]
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kleiner-onkel

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Messages: 412
Location: South-West-G


New PostCreated: 2006-03-23, 08:30 PM CET  Subject: Re: ... transmitter  print  recommend Reply with Quotation  

ja klar... würde mich interessieren... hab nur ein kleines postfach...
kannst du es mir per direktdatentransfer über icq schicken...?

Nr. 257-442-503


merci


chris

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sheldonstv
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Messages: 2


New PostCreated: 2006-09-09, 11:47 AM CET  Subject: Re: ... transmitter  print  recommend Reply with Quotation  

Honigtot
looks good-any chance of the schematic?????

regards mike




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richy_64

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Messages: 198

New PostCreated: 2006-09-22, 10:38 AM CET  Subject: Re: ... transmitter  print  recommend Reply with Quotation  

Sorry, i don´t have a really schematic for this.

The chain is:
Modulator (-38dBm output) -> ERA3 -> ERA5 -> Attenuator -> ERA3 (adjust Attenuator to get +10dBm here) -> RF2317

Unfortunately the RF2317 ´doesn´t work´ properly. The transmitted signal before the RF2317 (+10dBm) produces a much better picture on the tv than behind (+25dBm).
Perhaps something is swinging... i have to look for it.



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