[wxsig] Problem with modem2 tx

[John Koster]

It might be a capacitor at the output of the modem that is too small.  I
believe it is C111.  It can be increased to a 0.1 mfd.

On Tue, 28 Apr 2009, pedro.motilla at ono.com wrote:

> Hi people¡¡
> First of all, i enjoyed very much with the kit, it is really cute and nice, just one frustrating thing:
> I have a problem with tx. 
> The motherboard has sw 1.15.4R
> All the wxstn seems to work properly. (temp., communication with pc, menus, etc.)
> The modem board seems to be correctly assembled. Components are (at least seems) to be ok.
> All the tests from the manual are ok, only one gives a difference, but I think it is a mistake in the manual, it says that pin6 from modem2 should show 5V. Actually it shows 3,5 but I think is ok as far as 5 volts run trhought a led and i think it is normal a small voltage drop.
> Tx happens, so Q100 should be ok.
> The problem is that no audio gets out. When it is switched to tx, nothing is heard.
> Tests has been done with 2 transceivers, Icom mk2g and ht Kenwood thf6, with 2 transceivers the same happens.
> I changed the mx614p, but the problems does not fix.
> The RV100, has been put on several positions and the problem is the same.
> Just in case, I changed rx to tx pins (just to eliminate a wiring mistake).
> Any idea?
> Thanks in advance for help.
> Best Regards.
> EA5BFTPedro.
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-- 
73,
John, W9DDD