[Kenwood] TS-430 PLL Problem...

[Steve Kent]

Wow, this is great stuff, guys.  I will check this out tonight!

Regards & 73,
Steve Kent - KW5CQ

ma.locksmith at juno.com wrote:
> That provides a clue.....  it does jump up to the highest level....
>
> To me this says PLL/VCO is misadjusted for tuning range.
>
> What you want to do is measure the DC control voltage of that VCO.  It
> should change as you change frequency.  I think it's either bottoming out
> at the lowest voltage, or hitting the rail at the top.  See where it is
> when the set is working.
>
> The answer might be just a simple adjustment of the trimmer to allow
> operation over a different range.
>
> Do you have the alignment instructions for that VCO?  What dial setting
> vs what voltage?
>
> You might be able to second guess it.....  the VCO control voltage
> usually runs between 1.3 volts on the low side and 7 on the high side. 
> If yours is running between 0.75 and 4.0 you can take the dial to where
> the reading is 3.0 and adjust the trimmer so the voltage goes up to 6
>
> Ed
>
>
> On Tue, 12 Feb 2008 23:17:11 -0600 Steve Kent <skent at ix.netcom.com>
> writes:
>   
>> Hi Ed:
>>
>> Okay.  I took a look at it. If you START tuning UP form 28.999 this 
>> is
>> what happens:
>>
>> 28.999 Radio TX & RX OK on indicated freq.
>>
>> 29.000-29.365 Radio stays on 29.365, TX & RX
>>
>> 29.366-29.499 Tunes Fine, TX & RX
>>
>> 29.500-29.865- Radio stays on 29.865, TX & RX
>>
>> 29.866-29.999 Tunes Fine, TX & RX
>>
>> This repeats for every 1Mhz segment, spanning the entire coverage of 
>> the 
>> radio.
>>
>> Best Regards & 73,
>> Steve Kent - KW5CQ
>>
>>
>>     
>
>