[Elecraft] K3 SO2R Question

[Igor Sokolov]

Thanks Don.

73, Igor UA9CDC


> Igor,
>
> Looking at the Elecraft website for K3 Mods and application notes, it says 
> "*About 09/01/09 (RF board Rev H3)  and later."
> *The serial number is difficult to track because of the difference between 
> kit-built and factory assembled K3s.  The ship date is the most 
> significant tracking method for mods that are included.
>
> When in doubt, consult www.elecraft.com.
>
> 73,
> Don W3FPR
>
> Igor Sokolov wrote:
>> Starting what serial numbers please.
>>
>> 73, Igor UA9CDC
>>
>>
>>> All New K3s for some time have had this change made at the factory
>>> before they ship.
>>>
>>> 73, Eric
>>>
>>>
>>> On 3/8/2010 4:04 PM, Brett Howard wrote:
>>>
>>>> http://www.elecraft.com/K3/mods/K3%20rx%20protection%20mod,%20rev%20B.pdf
>>>>
>>>> That document explains a mod that you should definitely make sure is
>>>> in place in your radio if you're worried about this condition.  I had
>>>> one of Q8 and Q9 blow in my radio after too much power came back in
>>>> from another operator who told me he *WAS* staying off of 20 meter
>>>> like to told him to do he was down on 14 meters!  ;)  Anyway we
>>>> replaced the Q and the rig came back to life.  But if you view that
>>>> document it says that when you get to +13 to +20dBm it will
>>>> automatically engage the preamp for you.  +20dBm is 100mW so that
>>>> would at least give you an added 10dB of protection on your way up to
>>>> the 1-2W realm.
>>>>
>>>> ~Brett (KC7OTG)
>>>>
>>>>
>>>>
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