[R-390] Antenna trim repair

[Phil]

Geez, I swear that, from a lot of practice, I can
get the front panel off and rf deck out in about
15 minutes...assuming no messed up screws.  Reverse
is just the same.  Okay, first time or two, maybe
an hour at worst case.

That 1 hour must be an auto shop estimate at
the $100+ bucks an hour or whatever it is these
days :-)

BTW, the gear train disassembly pics are
priceless...thanks to whoever did those!!

thanks, 73, Phil W5BVB


On 6/19/2018 5:33 PM, Roger Ruszkowski wrote:
> 
> Fellows,
> 
> Will some one slide off and read Wei Li's Pearls of wisdom on this subject.
> R-390a.net
> Like every other problem with these receivers many talented people
> by virtue of opportunity have already been here and done that.
> 
> 425 pages of just the RF deck mechanical things. Gears and shafts and stuff.
> The truth is in the files. It is not a mystery, I just do not remember what the real apparent pin problem is.
> Once we understood what the assembly parts were, some one devised an elegant process to "rebuild" the antenna trim assembly.
> We have been here before and the notes are imbedded in Wei Li's Pearls.
> 
> In my day were taught better in school and did not get this thing screwed up.
> However there are details in your trusty R390 34 manual that are needed for your R390A knowledge.
> 
> Say What?
> 
> Go read the Pearls with the step by step disassembly process and where to get things to replace things known to be wanting replacement.
> And how to get the assembly clean, lubed, and back together.  Flat rate 4 hours depot bench. 1 hour RF deck out. 20 minute open and close the antenna trim cover. 1 hour RF deck back in. 2 hour performance test, remediation, and adjustment to best performance.
> 
> If you are intelligent enough to own an R390 receiver and know what it is and how to make use of it as a receiver, you are intelligent enough to complete any standard repair. (some Fellows are rewinding mechanical filter coils and stuffing new caps into umpucky space.) Now your manual dexterity to get it done yourself is something you have to access for yourself. If you have it use it. If you can, then take this opportunity to enjoy some other aspects of Amateur Radio.
> 
> Respectfully,
> 
> Roger Ruszkowski  AI4NI
>   
> 
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