[Elecraft] K2 Alignment....

Fri Mar 14 21:19:00 2003

Bob... I found my problem.... I feel like a fool.  I used the wrong toroid
to wind L25 and L26.  I was reading thru the parts inventory and could see
that L25 and 26 were 'red' toroids.

I hang my head in shame!

But the rig is working....

Thanks for you tip.  I followed your advice and it helped alot.  I remained
focused until I resolved the issue in the LPF stage.

Kind regards,

Dave.
----- Original Message -----
From: "Bob - AG5Q" <[email protected]>
To: "David Walker" <[email protected]>
Sent: Saturday, March 15, 2003 2:49 AM
Subject: Re: [Elecraft] K2 Alignment....

> Hi David,
>
> Try moving the antenna toward the front end  one circuit at time to see
where the signal is getting
> lost.   Check the diode T-R switches. In the RX mode, the anodes of D6,
D2, D3, D4 should be
> about 8.0V.
>
> On 40meters you can check the relay contacts  K1A, K1B to see if they're
programmed correctly.
> K1 pins 3 and 8 should be about 7V when 40m RX is set.
>
> K12A and K12B can be checked if you disconnect one wire from T4 pin 3
(this is the xmtr output
> transformer on page 4 of the RF board schematic). By disconnecting this
wire, you can measure the
> resistance of the K12 contacts. (If the wire is connected, the DC
resistance is always zero, so you can't tell the relay contact
> position.)
> K12 pins 3 and 8 should measure about 1.7K ohms to ground if no antenna is
connected.
> If that's ok, reconnect T4 pin 3.
>
> 73/ Bob - AG5Q
>
> ----- Original Message -----
> From: "David Walker" <[email protected]>
> To: <[email protected]>
> Sent: Friday, March 14, 2003 1:32 AM
> Subject: [Elecraft] K2 Alignment....
>
>
> .... in relation to my last posting seeking advice on my dead or deaf K2.
It seems that if I connect my antenna to the south end of
> R72 the rig recieves beautifully!  Even if I stick the antenna wire to the
can of Q21 the rx'er works - filters appear to work okay.
> But to the antenna socket or anywhere else... not a thing, just a low
level roar.
>
> Does this give me any clues?  Mmmm.....
>
> Any advice will be greatly appreciated.
>
> Regards,
>
> Dave.
>
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