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Re: KX1 Please need help with T/R thump

Posted by Don Wilhelm-4 on May 25, 2011; 12:13pm
URL: http://elecraft.85.s1.nabble.com/KX1-Please-need-help-with-T-R-thump-tp6395259p6402456.html

  Jerry,

That voltage would indicate Q7 may be at fault.
If you do not have a proper replacement, but do have a 2N2222A or 2N3904
in stock try one of those as a test.

73,
Don W3FPR

On 5/24/2011 11:48 PM, Jerry W7ANM wrote:

> Thanks Don,
>
> Maybe were getting somewhere. Q7s base is at zero during receive but on
> transmit it only goes to 0.1v.
> The 6T_2 voltage on the other side of R28 goes from 0v during receive then
> to 5.63v on transmit. (Normal?)
>
> Looks like I will need to get another Q7?
>
>
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