laser
New Member
I have RT73
Posts: 13
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Post by laser on Jan 28, 2021 7:48:22 GMT
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Post by Daniel VA2DG on Jan 28, 2021 15:10:17 GMT
Hi Laser
nice shot.
can you put a step by step How to open the case and where to start so we dont accidentally tear a ribbon apart.
I am asking because i have one of my CDR300 that the fan wire Red was not connected in the radio and fan never worked since day one.
I was kind of afraid to open it after i saw the tear apart of a CDR200 by the FCC for approval, They had about 25 pictures of the radio all torn apart.
My Guess is the screws are under the orange sticker on both side.
Thanks for sharing your picture.
I may try to open it to find where Kydera did forget to solder the Fan power.
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laser
New Member
I have RT73
Posts: 13
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Post by laser on Jan 29, 2021 7:27:46 GMT
exactly. 4 screws are under the orange stickers. it is necessary to open carefully not to break loops. in principle, everything is available. although not very convenient. then you may need to unsolder a few wires, or worse coaxial cables ...
the last photo seems to show two wires from the cooler
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rudy
New Member
Posts: 49
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Post by rudy on Feb 3, 2021 16:06:30 GMT
hi ... great job !
not have the photo of the RF final transistor (or mosfet )?
does anyone know the code of the component used as a 20 watt FR power amp?
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laser
New Member
I have RT73
Posts: 13
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Post by laser on Feb 27, 2023 12:54:24 GMT
AFT09MS015N  136–941 MHz, 16 W, 12.5 V |
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laser
New Member
I have RT73
Posts: 13
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Post by laser on Feb 27, 2023 12:57:15 GMT
I bought a more powerful one AFT09MS031, since you can see that it failed miserably. but alas, I didn't have time to solder into this $200 piece of crap, which is not properly cooled Attachments:
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136–941 MHz, 16 W, 12.5 V
