[DEMI] 144-28K problems

[George Fremin III - K5TR]

On Fri, Jun 29, 2001 at 06:55:13AM -0700, Tree Tyree N6TR wrote:
> > All of the (there are four in the manual) RX voltage test points
> > check out ok.
> >
> > All of the TX test points check out ok.
> >
> > The T/R relay seems to be working.
> >
> > 3. R28 - near F1 - should see a votage drop across this - I do.
> >    It has 13v on the 13v side and about 6-7 volts on the other side.
> >    The only thing that I notice is that this resistor is getting 
> >    almost too hot to touch.  I powered up the 222 transveter and 
> >    the same resistor gets warm as well but I think the one in the 
> >    144 box is getting a bit warmer.
> >    Could this mean that IC7/MAV11 be drawing too much current?
> 
> If the voltages are right, and the value hasn't changed (you could
> try checking with an Ohm meter), Ohm's law suggests that the current
> is correct.
> 

The value seems to be the same.

> Have you considered a cabling problem external to the transverter?

I have checked that several times - my 222 and 432 transverters 
seem to operate as one would expect when swapped with the 144 transveter.



-- 

George Fremin III                 
Johnson City, Texas             "Experiment trumps theory." 
K5TR (ex.WB5VZL)                            -- Dave Leeson W6NL
geoiii@kkn.net                             
830-868-2510                      
http://www.kkn.net/~k5tr