[Elecraft] S meter
Don Wilhelm
w3fpr at embarqmail.com
Sun Dec 30 21:08:02 EST 2007
James,
Well, maybe not that good - just a little application of logic aided by
a look at the schematic.
Couple that with the facts that the design is known to work and the most
common cause of failure is the soldering.
Have a good day and an Happy New Year.
73,
Don W3FPR
JC Quinn wrote:
> Wow! Don, you're good! I had looked at those pins under 5x
> magnification and they looked fine. I reflowed those pins and a
> couple of more on the board that did look questionable and now she
> works fine!
> 73 and Thanks a Million!
> James
> ----- Original Message ----- From: "Don Wilhelm" <w3fpr at embarqmail.com>
> To: "JC Quinn" <kc4ee at sonet.net>
> Cc: <elecraft at mailman.qth.net>
> Sent: Sunday, December 30, 2007 6:21 PM
> Subject: Re: [Elecraft] S meter
>
>
>> James,
>>
>> I have to take you at your word that the AGC is working OK. If that
>> is in fact true and you cannot get good S-meter indications on the
>> bargraph, the only thing that could be wrong is th esoldering of pins
>> 9 and 10 of RP6 or the soldering of U6 pin 3 (all on the Control
>> Board). Check those first.
>>
>> Should that not be the problem, then more extensive checks of the AGC
>> circuit are in order, and you can also conclude that your AGC is
>> *not* working properly.
>>
>> Remember that the most common cause of kit problems is soldering
>> problems. When in doubt, check the soldering, then recheck the
>> soldering. When you have finished that, check the soldering.
>>
>> 73,
>> Don W3FPR
>>
>> JC Quinn wrote:
>>> With the RF gain fully ccw the S meter will not light at all. I
>>> have tried it with the meter set in both DOT and BAR. Now get this,
>>> at the end of PART II Alignment, CAL S HI did work. Something
>>> messed it up during final construction. FWIW the Bar Display DOES
>>> work in transmit showing RF/ALC so its not burned out and the first
>>> segment comes on in CAL S LO. Any suggestions as to where to look
>>> next? Does anybody know if Elecraft is working on Dec 31?
>>> 73
>>> James Quinn kc4ee
>>>
>>
>>
>>
>> --
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>>
>>
>
>
>
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