[DSP-10] still no PLL locks

[Yamamoto Jiro]

> Courtney Duncan a écrit :
> 
>>  Removed the slug from L102 and bent L103 and Q101 around a bit.  At this
>>  point, when I inject ground at the junction of C113 and R105, I get
>>  123.62 MHz.  When I inject 5V at the junction of C113 and R105, I get
>>  129.07 MHz.  This should be precisely the desired tunable range.
> 
> I just changed C117 from 10 pF  to 6.8 pF to center PLL range.
> 
> 
> --
> 73 Gérard F6FGZ

In my case, I changed C117 from 10pF to 7pF and adjusted L102 in order 
to increase the LO freq  But it  did not cover all the tunable range 
needed. I then changed C141 from 10pF to 7pF, too. This time PLL locked 
at the range from 124MHz up-to 126MHz. While it still did not lock over 
126MHz it is enough for me since  under Japanese regulations 2m amateur 
band must be 144MHz to 146MHz! For this reason, I also modified the 
original 144-148MHz band pass filter to comply with the 144-146MHz 
regulation. For more details please refer to my DSP-10 web page at 
<http://bagdad-cafe.homedns.org/mono/dsp10/construction/>. Sorry for 
non Japanese readers, that page is written only in Japanese.

Regards,
Jiro JQ2LMG