[Elecraft] KX1 Test Part-1 problem ???

[a.yoshida]

Don

I appreciate your comment.
I decided to continue building.

My DMM may be too old. His age is over 20 years or so, Hi

Don Wilhelm wrote:
> Aki,
> 
> At D2, the AC voltage could be power supply ripple, but the regulators
> should smooth that out.
> 
> Because you show about the samee AC voltage at all these points, the most
> likely problem is your DMM.  You might confirm that by turning the power
> switch to OFF and checking the AC voltage at D2. If you still find the same
> 150 mv ripple, it is most likely hum pickup on your DMM.
> 
> I would continue building and recheck later after locating another DMM that
> you could borrow.
> 
> 73,
> Don W3FPR
> 
> 
>>-----Original Message-----
>>
>>Finished KX1 assemly part-1 and made test-1.
>>All check has been OK except following.
>>
>>Voltage check 2 in the manual says that ac voltage is under
>>20mv AC rms at D2(A/K), U1 Pin1 and U3 Pin6.
>>My old and cheap DMM shows about 150mv at these point.
>>Checked C7, C10, C38 but could not find any miss-installation.
>>
>>I have not any other DMM.
>>Can I go to assembly part-2 ?
>>
>>Any suggestion will be appreciated.
>>
>>
>>73 de aki, ja1nlx
>>
> 
> 
> 

-- 
73 de aki, ja1nlx
ayoshida at my.email.ne.jp
http://www.asahi-net.or.jp/~yy7a-ysd/
http://ja1nlx.exblog.jp/