FT-817 synthesizer problems ?

Today i had a look to the output spectrum of my FT-817 i use for 23cm operations. I looked to the IF signal of 144MHz.
There are several spurs with a distance of around 28.5kHz of each other and <50dB of the wanted signal. This corresponds to my observation that strong neighbour stations can be heard in regular steps again and again. It happens in CW and also in SSB mode. Does anyone have a idea what could be the cause ? I assume the problem is somewhere in the synthesizer... Update 2010/10/01
When looking to older screenshots i saw that they were not that spurious. The difference was, that i did not use the switched power supply from Alinco at that time but a linear one. So i checked again with a linear supply today. Result: Most of the spurs disappeared. Just some weaker ones are remaining.

FT-817 CW constant tone, 5W, span 400kHz

DUR test september 2010

Last weekend: Another times DUR activity. Another time from Triebenberg JO61XA. This time i used my new power generator. Unfortunately i missed some extra fuel and so i had to go qrt a bit earlier.
Highlight was a qso to DR3M north of Hamburg.
Etwas noch: Wenn man sich ueber die Signalqualitaet eines anderen OM beschwert, dann bitte qualifiziert. Denn nur dann kann man auch tatsaechlich etwas unternehmen. Ein “Scheiss Signal.” ohne weitere Information hilft vor Ort wirklich nicht weiter.

23cm equipment

23cm equipment + generator + packet radio

Recycling old CB radios

Some weeks ago i found an interesting webpage. At funkservice.at Gerhard offers PLL modules and DDS modules that fit to the LC7132 pinout of old CB radios. With these modules you can change your old 40 channel CB radio into an 80 channel version. I did this with my old dnt Carat exclusiv which was one of my very first radios that i ever owned. Now it has full 80 channels.
Unfortunately with this modification it lost its operating permission :)
But i am writing these lines because Gerhard also offers modules to modify old CB radios for FM usage within the 10m amateur band FM range. The modules will do automatic repeater shift within the 10m repeater frequencies.
This might be a good way to get some activity to this band using old CB rigs for doing some local qso on 10m in FM.
It is also a chance to support newcomers with transceivers that cost just a few Euro.

dnt Carat converted to 80ch

dnt Carat converted to 80ch