[Elecraft] K1 Receiver Issues

rhsanborn at comcast.net rhsanborn at comcast.net
Sun Sep 23 13:09:05 EDT 2007


Is there any way that I can use one of the programs that turn the PC sound card into a signal generator to inject some amount of noise into the radio at various points for testing? I'm not confident in my very rudimentary antenna, and while I understand that the sound card can't output at a receivable freq, perhaps it can cause some noise that I can hear on the phones... ?

Any ideas?

Randall


 -------------- Original message ----------------------
From: "Randall H. Sanborn" <rhsanborn at comcast.net>
> I am completely new to amateur radio, the K1 is my first xcvr, and I 
> don't even have my license yet.
> 
> I have recently completed the assembly of my K1 and I'm not able to pick 
> anything up on the receiver. I worked with someone on the #hamradio 
> channel at irc.freenode.net, and hopefully we've narrowed some things 
> down. I will attempt to explain what we've looked at so far with my 
> butchered lack of understanding.
> 
> I've tested all the toroids for continuity and they all check out, and 
> I've also gone through the and filter baord portions of the voltage 
> tables, and those check out as well.
> 
> With some quick and dirty signal tracing (30ft of wire with a probe on 
> the end), I tried inputing rf into various points in the circuit. I got 
> responses at the following points, all on the rf board:
> 
> U2 Pin 1
> C38
> X4, the leg connected to C38
> 
> I didn't get any response at the following points on the rf board:
> 
> C39
> X1-X4 (except for X4 mentioned above)
> 
> Checked the voltages on D6-8 and they are all installed and working 
> properly.
> 
> Any ideas where I should look next?
> 
> Randall H. Sanborn
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