[Elecraft] no DDS VFO output/KX1

[Fred Townsend]

Ron I have no comments about the KX1. However I do seem to recall the Tek 422 has a 30 MHz bandwidth with a P6006 probe.

73
Fred, AE6QL

-----Original Message-----
>From: wa7bme at citlink.net
>Sent: Aug 23, 2014 3:50 PM
>To: elecraft at mailman.qth.net
>Subject: [Elecraft] no DDS VFO output/KX1
>
>Hello All:
>My first time to post to this list.
>I am building KX1 S/N 2825 and have progressed to page 43 Alignment and Test Part 2 with no problems.  I have completed tests through page 44-keyer.
>I have not been able to proceed to the Receiver Alignment section, page 45, because I can not discern any signal from the DDS VFO, so not able to hear any
>signals, on either 20m or 40m.
>My question is this: should I be able to see the VFO signal at pin 19 of U2?  I am using an old TEK 422 scope with 10 x probe.  I see nothing at pin 19 or at pin 3 of Z2 the 50 mhz clock.  At pin 3 of Z2, clock output, I measure gnd (with power off, of course).  I also measure gnd at pin 4 of Z2, but also see 2.7 vdc when the unit is powered up.  No VFO or MCLK signals are visible.  This is confusing(!)
>
>I’m kinda stymied at this point, and any suggestions are welcome!
>Should I be able to hear the VFO signal on an outboard receiver?
>Should I be able to see the VFO signal at some point, and where is the best measurement point?
>Another note: I am using the directions from Don Wilhelm’s letter of 4 May, 2011 regarding replacement of components for KXB3080 option prior to installing the option.  This includes C27,C26,C1,T2. He will know what I am referring to.
>Sorry to run on for so long.
>
>Any help or suggestions, please?
>
>Thanks for the bandwidth.
>
>73
>Ron Dickerson WA7BME
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