[Elecraft] TX/RX Discrepancy

[Trevor Day]

Just reached a useful pause point and carried out the check you 
suggested Don.  The voltage remains stable on both pins 1 and 7 of U6 
when I key up.  Just to check I also keyed the tx with 'Tune' and, as 
you suggested, it does show a negative shift in voltage.

The only discrepancy I have found so far is with the BFO test (p59) 
where I can only achieve a high freq of 4916.27 instead of 4916.3.  The 
low is 4911.87, a bit lower than it needs to be, so I *could* shift the 
range up a bit.  I don't see this as my main problem though so it has 
been noted rather than acted upon. (Unless anyone knows differently).

Alignment continues :-)

Thanks
Trev

In message <gVqLiCLdDtL+Ewsr@trevday.eurobell.co.uk>, Trevor Day 
<Trev@secornwall.com> writes
>Thanks Don,
>I'm just going through a full alignment; once I have finished I'll do 
>as you suggest and let you know here.
>Trev
>
>In message <DAV57fLVPS5OKVRYadw0001eeb1@hotmail.com>, Don Brown 
><DolfinDon@msn.com> writes
>>Hi
>>
>>I went out to the lab and tried it on my K2. The reference control voltage
>>and the VFO control voltage do not change from receive to transmit on USB or
>>LSB when keying the transmitter. You will see a shift in CW mode because the
>>side tone is added in on receive. If the control voltages are changing on
>>your K2 then you need to track down why. The +8 volt supply is regulated on
>>the control board so a control board swap may help isolate a problem on the
>>supplies if that is what is causing the frequency shift. Note you must key
>>the transmitter, not use tune for this to work. Pressing tune in USB or LSB
>>is the same as CW and you will get a shift in voltage.
-- 
Trevor Day