[Heath] LMO rebuilding....did I mess it up?

[Guy Giacopuzzi]

Ken,...and company...
Oh, you can make it do just the opposite, believe me.  You can set up 
the cap to either start from fully open or from fully closed. Thinking 
that the LMO would "naturally be set up to go up in frequency with 
indicated read out frequency" I set it up to start from fully 
closed.....but if it starts from fully open, guess what? The frequency 
will go /down/ as you turn the dial clockwise.....  Spent the hour 
before going to church reversing it and getting the spring loaded drive 
gear "cocked" and the braid back on...it should work right now...
Guy

On 3/13/2016 5:52 PM, Kenneth G. Gordon wrote:
> On 13 Mar 2016 at 15:30, Guy Giacopuzzi wrote:
>
>> Ok, that's the first mistake I made in rebuilding it...I made so at the full,
>> counterclockwise position, the capacitor was close to fully closed; I should
>> have set it up fully open...so that when I turn the dial clockwise, the LMO
>> frequency should go down, right?
> Hmmm.....that, I don't remember, but when I have some spare time (we are
> building an addition to our home, which is taking up most of our time), I'll
> yank one open and take a look. I can't imagine how one could purposely
> reverse the direction of tuning, though
>
>>    As the indicated frequency goes up, the LMO
>> should be descending from 5.5 to 5.0mhz, right?
> Correct. For instance, on 80 meters, at the indicated frequency of 4.0 MHz,
> the output of the LMO should be 5.0 MHz, and at an indicated frequency of
> 3.5 MHz, the output of the LMO should be at 5.5 MHz.
>
> The EXACT frequencies will depend solely on the frequency accuracy of
> your heterodyne oscillator crystals.
>
> The same holds true for all the other bands too.
>
>>    I set mine up doing just the
>> opposite..LMO is going up when indicated freq is going up, which is
>> wrong....Gotta take the darn LMO out again..... Guy
> Sigh....yes....
>
> My sincerest condolences. :-(
>
> BTW, I have always considered those LMOs to be very beautifully built.
>
> Ken W7EKB
>

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