[Elecraft] RF Probe again

[Don Wilhelm]

Gary does not work weekends, and you can likely have it isolated by then.

If you have no output from U10-4, then how about the input at pin 1? 
That should be the BFO signal fed to the transmit mixer. (you do have 
the KSB2 plugged in correctly do you not?).  The only other signal that 
must be present is the TX VFO which should have at least 70 mV RF on U10 
pin 6.  You must be in TUNE or otherwise keydown to get RF to U10-1.

If you have RF at both U10-1 and U10-6, you shoudl also have RF at 
U10-4.  Check the DC voltage at pin 8 (it will only be present during 
TUNE or other transmit periods).

73,
Don W3FPR

Gary Montalbine wrote:
> Basic problem was engage mind before typing. High DC voltage at U8 and 
> no RF voltage at pin 4 of U10. Low RF voltage at pin 6 of U9. Wanted to 
> make sure my RF probe was good before continuing. It has been many years 
> since I have messed with electronic circuits.I may be back at the Novice 
> level. Would this be the appropriate forum to address my transmitting 
> problems or should I bother Gary?
> 
> I appreciate everybodys help thus far.
> 
> Gary, WA4SZI
> 
> K2 #1009
> 
> 
> 
> Don Wilhelm wrote:
>> Gary,
>>
>> I must be misreading something or you had a typo.  RF Board U8 is a 
>> voltage regulator - you will not find any RF there.
>>
>> 73,
>> Don W3FPR
>>
>> Gary Montalbine wrote:
>>> Thanks all for the response. My RF probe works at TP1 and the PLL and 
>>> VCO circuits. U8 was where I had no voltage and was unsure of the 
>>> probe. Need to check further.
>>>
>>> Gary, WA4SZI
>>>
>>
> 
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