[Hammarlund] SP-600JX14 problem - main tuning capacitor sync

[AW]

Hi Bill,
	It sounds like the previous owner didn't get the new paper dials on 
properly, or didn't move the dial to correct the error.  The dial has 3 
slotted holes at it's center, and is held on place by 3 screws thru a 
disc.  They can't be accessed unless the panel is off, or at least 
possibly loosened and moved back.  (I hope that makes sense.) There 
might be enough adjustment available to get it right.
	At the lower end of the band, the dial should indicate zero on the 
logging scale, with the freq. dial right on the left end of it's scale. 
And the stop pin on the stop.
	Shouldn't have to (don't) mess with any gearing.
	Take a look at Andy Moorer's instructions.  As he says, re: the manual, 
"The instructions are often more confusing than helpful.
   <https://www.hammarlund.info/GearTrainAlignment.html>
73,
Al, W8UT



On 11/16/2024 9:59 AM, Bill Cotter wrote:
> Hello everyone,
> 
> I have a nice SP600JX14 I am restoring to work with my globe King 500A 
> transmitter. I have the RF deck and side porch recapped with 0.01 600VDC 
> disc ceramics and all out of tolerance resistors replaced. After 
> reassembling the RF deck on the chassis, I noticed something strange.
> 
> When the main tuning dial is set to the bottom of the band and the 
> logging scale is set to zero, the main tuning variable capacitor is not 
> fully meshed. It is all but about 10-15 degrees meshed. The stop pin is 
> resting against its stop, as expected. When I rotate the main tuning to 
> the highest frequency, the dials do not reach the expected end point and 
> the stop pin does not reach its stop. I assume the main tuning variable 
> capacitor has reached its end point.
> 
> It appears that the main tuning variable capacitor is out of sync with 
> the dial indicators. The previous owner refinished the front panel and 
> applied new dial scales to the dial plates, but he never disturbed the 
> gearing behind the dials.
> 
> Any thoughts on how to correct the not-fully-meshed main tuning 
> capacitor problem? I have all the digital copies of manuals with gear 
> set exploding diagrams and tear down/reassembly directions, but I 
> haven't come across the synchronization procedure.
> 
> Thanks in advance.
> 
> 73 Bill N4LG
> 
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