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[aprssig] Re: Homemade APRS with MCS-51 and TCM3105NL

Scott Miller scott at opentrac.org
Tue Sep 11 02:13:56 UTC 2007

If availability is the problem, then I can help you there - I carry the 
MX614P for USD $9 on my website:


International shipping (by letter post) is around $3 or $4.

I also just got the TCM3105 in stock (only a few units) today - I'll add 
a listing shortly.  They're more expensive than the MX614P, though.


jecksons at softhome.net wrote:
>> If I recall, the MX614's TX retiming is optional.  You can disable the 
>> retiming and transmit whatever baud rate you want.
> No no from Datasheet said the Detector from MX614 diffent than detector 
> from TCM.Also /RDY timing didn't appears in TCM.
> MX614 tolerants againts the baudrate drift,the TCM must precise the 
> baudrate
> i.e 1200 bps or 2400bps depends on crystal with TCM.
>> Are you saying you want to run a baud rate that's not 1200 or 2400, or 
>> that the MX614 isn't accurate enough for you?
> I'm saying,Didn't had MX614P and imposibble to bought the MX614P.
> Did you had info how's to get sample the MX614P?
> Here the MX614P was 30US$/piece and TCM only 15US$/piece.
> I had 6 chips TCM3105NL.
> Sorry for my spartan English
> Vy 73&88
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