[Boatanchors] HRO 60 alignment problem.... solved

Bill Cromwell wrcromwell at gmail.com
Tue Oct 8 08:46:21 EDT 2019


Hi Pete,

It is possible that inductor was installed at the factory. I have some 
personal experiences and records of other assembly errors and some of 
them seem just incredible. If the previous users didn't use that band(s) 
It would go unnoticed until you tried to use it.

There are hams who rarely to never get on frequencies higher that the 
forty meter band. I have been on those higher frequencies only enough 
that I can't say "never".

73,

Bill  KU8H

On 10/7/19 10:38 PM, Pete Williams wrote:
> .....checking the  alignment  of  some  coil boxes.. I  found the   GC  on
> a 14 - 30  MHz   box  A---- I have  2 if them-- must have  a problem in
> the  oscillator  box #4.  There  was no  way the frequency would  move
> high  enough to  enable   the  WWV  on 15 Mhz  to  tune  to  the
> injection  freq of   around  17 MHz.
> My other box  A was   fine   and  even exchanging  the   osc.  box 4
> proved  the original  diagnosis  justified.
> I  should  add that it  was possible to  monitor the  injection  frequency
> with the  simple  expedient of  connecting my freq counter  via a X  10
> probe to  the  osc  trimmer...  the  frequency  not  that  accurate  as
> capacitance in the  probe lowered freq  but  gave a ball park figure  that
> could  be  corrected  when  the  fault found  and  fixed.
> So  dismantling  and  comparing  both coil  box #4  revealed the
> truth.....all  components  compared  similar   xcept the  coil  on the
> suspect  box  had  4  turns instead of  the 3  turns  on the working  one.
> Further investigation showed the  part  number  stamped on the  coil
> former and  checked  with the  parts list  showed it  was  for a coil box
> B - 7-14 MHz  ! !
> With nothing to lose,a turn  was removed at the end  furtherest from the
> tapped connection, reassembled. and  now  had  no  trouble  getting
> injection   correct  and   a   functioning  unit.
> Why some  previous user  made  the  change  is  unknown.
> Cheers
> 
> Pete   VK3IZ

-- 
bark less - wag more


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