[Elecraft] Help with first KPA Transmit Tests

Karl Larsen k5di at zianet.com
Sat Aug 12 17:05:30 EDT 2006


Jack Smith wrote:
> To hear a beat note when sending CW, your VX-7R will have to be in SSB 
> or CW mode. When set for AM reception what you are hearing is normal.
>
> Jack
>
>
> Michael Cook wrote:
>> OK, I'm back for more help. I've been building a KPA 100 and I'm at 
>> the part where you are supposed to first test the transmitter by 
>> transmitting into a dummy load and listening on another receiver.
>>
>> Now the other other receiver I have is a Yaesu VX-7R handy-talkie. 
>> Now I've tuned them both to the same frequency (7.150 khz) and the 
>> VX-7R is an AM mode. When I key the transmitter, the 7R picks it up, 
>> but I can't hear any sound. I've fiddled with the volume and all 
>> that. It breaks squelch, it shows up real strong on the S meter (full 
>> meter). But there is just no sound, I can't hear the CW signal. This 
>> happens at all power levels. I've also tried tuning around a little bit.
>>
>> Now my theory is that this is my fault, as I've never tried to use 
>> the VX-7R to try to listen to CW before so I'm not sure what I'm 
>> doing is right.
    I have a VX2-R and it tunes the HF bands but only in the AM mode. In 
AM you never hear a beat note. Check your VX7R book and see if you can 
change from AM to any other mode. SSB or CW will work fine.

73 Karl

>>
>> Is my procedure above correct? Is there something else I need to do 
>> (like set a different frequency)?
>>
>> -- Michael Cook
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