Hi Gary,
Perfect! Makes sense when I examine the schematic. I should be able to
probe around there and see how the 12 meter Y6 crystal is doing and whether
it gets through D14. Will check back afterwards.
73
Phil W1PJE
On Thu, Dec 27, 2018 at 7:08 PM MadScientist <dukeshifi@comcast.net> wrote:
> I did not see the part about the low RX, sorry
> Possibly the 12 meter crystal oscillator switching diode is bad (D14) or
> the coil (L21) is open.
>
> More likely, the solder joints around these two components are bad and
> =need to be solder-sucked and desoldered.
>
> Soldering was never one of TT’s strong suits…
>
> I have fixed three or four Omni 6 radios just by desoldering the region
> specific to the band in question.
>
> Gary
>
> W0DVN
>
> > On Dec 27, 2018, at 6:01 PM, Phil Erickson <phil.erickson@gmail.com>
> wrote:
> >
> > Hi Peter,
> >
> > I'll check that next, but I'm a bit mystified if this is the problem
> > since I see there are only 6 LPFs in the bank. So I'm not sure why I
> would
> > be getting full power on 15 and 10 meters but not 12 if one of the relays
> > was not working. (It would have made more sense to see that e.g. 12 and
> 10
> > meters were low output because they were going through the same faulty
> path
> > to a LPF.)
> >
> > Also, the 20 dB less sensitivity on RX is not related to any of this,
> > correct?
> >
> > 73
> > Phil W1PJE
> >
> >
> > On Thu, Dec 27, 2018 at 6:42 PM Peter Bertini <radioconnection@gmail.com
> >
> > wrote:
> >
> >> Most likely a bad relay in the transmitter low pass filter bank..
> >>
> >> Unlocked HFO does not cause low power, just a few kHz error and a warbly
> >> signal.
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