Circuit diagram of TRX2A Main Board Rev. C?

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Circuit diagram of TRX2A Main Board Rev. C?

Postby DG4FCO » 05 Aug 2017 18:29

Hello,

I wonder where the circuit diagram of the main board Rev. C is?
http://www.jumaradio.com/juma-trx2/manu ... V2.6.5.pdf only contain diagram for Rev. B. As there are a few (minor?) differences between the two revisions I like to get the right one :)
Can anybody give a hint/link?

Thanks in advane
vy 72/3 de Frank, DG4FCO
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Re: Circuit diagram of TRX2A Main Board Rev. C?

Postby 5B4AIY » 06 Aug 2017 07:08

Hi, Frank,

Attached to this post are the details of the Revision C version of the Main Board. The principle change is the incorporation of the Spur Elimination module rather than having it as a separate attachment as it is in the Revision B version. On the image, you can see this in the top left-hand corner where there are two transistors marked Q1 and Q2.

Also attached is the schematic for this board.

Hope this helps.

73, Adrian, 5B4AIY
Attachments
TRX-2 Main Board Layout Rev C.pdf
Rev C printed circuit layout
(351.5 KiB) Downloaded 16 times
TRX-2 Main Board-Revision-C.jpg
Rev C board image
TRX-2 Main Board RX RevC Schematics.pdf
Rev C Schematics
(160.39 KiB) Downloaded 18 times
Last edited by 5B4AIY on 07 Aug 2017 05:33, edited 1 time in total.
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Re: Circuit diagram of TRX2A Main Board Rev. C?

Postby DG4FCO » 06 Aug 2017 09:52

Hi Adrian,

thanks a lot, this helps!

vy 72/3 de Frank, DG4FCO
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Re: Circuit diagram of TRX2A Main Board Rev. C?

Postby admin » 07 Sep 2017 21:10

Frank and others,

Pse check always the latest documents in the "Technical kit info" link in each Juma kit page.
It can be found in left-top corner. See eg TRX2A here http://www.jumaradio.com/juma-trx2

73 Admin
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