[ICOM] PRO III bias setting

[Larry Benko]

These manuals do not include the SERVICE manual which is what he needs.  
I have the service manual in pdf format and it is 24MB. Chapter 4 
describes all the adjustments.  Page 4-4 says measure idle current and 
adjust R14 driver) for an increase of 1A, then adjust R16 (driver) for 
an increase of 1A, then adjust R65 (final) for an increase of 1A, and 
finally adjust R67 (final) for an increase of 1A.  Procedure was started 
with all pot. fully CCW.

This would imply that all 4 devices in the driver and final section have 
a quiescent bias of 1A.

Larry, W0QE


On 8/12/2012 10:54 AM, Chuck Sudds wrote:
> On 8/12/2012 11:49 AM, ns0i at comcast.net wrote:
>
> You can download the manuals from this link:
>
> http://www.icomamerica.com/en/downloads/Default.aspx?Category=27
>
>> If you are having one driver replaced then the person replacing the driver
>> should know how to make those adjustments.  If they don't/can't then I would
>> not have let them near my radio.
>> NS0I
>>
>>> Do some searching, the manuals are available for download.
>>>
>>>
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