[Icom] RE IC211 Tuning Problem
Gary V. Smith
[email protected]
Thu, 19 Sep 2002 03:31:40 -0400
Thanks for the info. It'll give me some more detail on what to be aware of
when I remove the case to inspect the workings.
73,
Gary - W6GVS
At 01:13 PM 9/18/02, you wrote:
>Going back in my memory to when I struggled with the IC211, there were two
>potentiometers involved with the optical coupling. A slight adjustment to
>these potentiometers would sometimes bring the tuning back to life. I
>believe they were located very near to the optocoupler and they set the
>levels for the decoding of the coupler. I was never sure if I was changing
>the setting or just cleaning the pot where the wiper was sitting.
>
>The other area that is a problem with the IC211 are the plated through
>holes on the pc boards. Problems with these can result in any variety of
>problems, including the tuning. I believe that they can affect the PLL.
>I've seen cases where they have been jumpered with hookup wire to make
>them work. This was the downfall for a very nice transceiver and often
>were the reason you would see people selling them.