[TenTec] Omni 6+ - no output on 12M/10M and omni 6+/ power issue

[Dr. Gerald N. Johnson]

Question is does it receive on those bands? The LO is as critical to 
receive as to transmit and its the same LO. Loosing two bands on 
transmit is indicative more of a low pass filter problem where those two 
bands are shared like 10 and 12.

73, Jerry, K0CQ

On 11/27/2010 3:32 PM, Wayne Dial wrote:
> Ken, if I'm correct the output from the l.o. mixer , port 26, should be pretty
> much the same on all bands?  I do have a good scope but do not have a good
> signal generator.  I used to have all that quality equipment  on the job, but I
> have been retired from the business for 13 yrs.  The l.o. mixer board is nested
> below a cover which has  another board mounted on the top, making it almost
> impossible, with out a wiring harness, to make live checks.  I have made ohm
> meter check of of the switching coming into the board and all looks okay. I've
> checked the diodes at the output of of u2 feeding the bandpass filters and they
> are all okay.  I've not checked the solder joints.   I do wonder about u2
> (udn2985, 8 ch. source driver) though it is rare to have that type of failure
> with a I.C. if it  has not taken some kind of abuse.
>
> Thanks for the input and I will take the board out and check the solder joints
> with a magnify glass.
>
> Wayne
>
>
>