[Premium-Rx] RF-590 A12 Assy Schematic

Sun Jul 21 14:07:42 EDT 2019

Tom  perhaps i have an answer for you, you can question the plausibility 
at your own risk.

With a hefty amount of "swagger" and equal amount of Bravado [albeit 
false at my age of 73]  I took over the Mac work table, never mind the 
disruption it will cause to our filing our 2018 Tax's and the piles of 
IRS forms my wife had scattered around the table.

I found my missing page 2 of 2 for the A12 board, it is my guess the 
reason J10 might not be brought out onto/beyond your board and possibly 
any of the boards is ?  It is a duplicate port of the J6 1mhz reference 
signal as provided already existing at J6.

So leap of faith here, the board designers made a provision for the 1 
mhz signal to be extended 2 times onto the rear panel, the next 
reviewers said hey we can save $5.00 here and just not bring or extend 
this duplicate output where we already have the same identical signal at 
J6 and roll the chances of any user ever wanting or needing a dual port 
offering for the 1Mhz ref signal...

I can scan this page if it will help and send to you, and be pleased to 
do so, if it will aid your effort or u just want it.

Or worse perhaps i am missing your original question or concern, and if 
so ill go dig back into my new sorted out book where it is so easy to 
find it all now..

And i guess in the spirit of "getting along" and extending good faith,  
i'll go back and reconstruct all the tax papers is pretty close layout 
to what i found ...

If i can help let me know ..

mac/mc  w5mc

On 7/21/2019 10:13 AM, Mac wrote:
> Tom upon further review my 'odd'  book is so jacked up, coupled with a 
> failing memory,  this book appears to be maybe complete, but, not in 
> any order.
>
> My guess is i took it apart to make a copy for someone and had all the 
> fold out drawings/schematics pulled to run at one effort for that size 
> paper, as well had removed all the tab or index dividers and likely it 
> was on the "Mac" work table, often in most homes called the family 
> dining room table.
>
> Then i must presume after my guess, an unreasonable period [my guess 
> 4-6 weeks] of time to my significant other {wife} issued a plea that i 
> likely ignored then morphed into a demand or most often just a "look"  
> there again i likely ignored, assuming my BS would carry me another 
> 2-3 weeks before some real action would be required.
>
> Oh but then to one day find the binder papers tabs and such placed 
> here in my radio room in my chair, in no order and with not a lot of 
> love or concern seemingly given to the gathering or placement here in 
> my office, my assumption is we had some guest coming and i had over 
> played my hand [again] and she [my wife] took out some 
> anger/frustrations and with an indifferent attitude dumped it here, 
> and was damn glad to see it OFF the dining room table. 43 years 
> together still only buys or allows you so much latitude it seems.
>
> So my result is for me to really dig into this book i will need to 
> reassert my claim for the Mac worktable and spread it all out again 
> and try and put this puppy back together again, wherein i might be 
> able to offer you more help.
>
> In this heap however i did also find the factory acceptance test of 
> the time for the 590 receivers and for s/n. 1881 in particular
>
> mac/mc  w5mc
>
> On 7/21/2019 9:02 AM, Mac wrote:
>> Tom: doubtful I can be of significant help, BUT  my 590 book is a bit 
>> odd i think, My A12 section on table 1. A12 Interface Connection list 
>> what seems to be all the various Connection points at least 
>> presumably so. Starting with J1 and running thru/ending J9-9..
>>
>> Yet a few more pages at Table 2. indeed J10. is listed as a part and 
>> like your pictorial component layout page 13/14 Figure 3. there sits 
>> J10. in the upper left and above J6 and J5
>>
>> I will add this book is a bit odd or different and lots i had not 
>> paid attention to so let me prowl thru more of it and sorta get 
>> myself up to a better speed and see if i can offer more help after a 
>> little more review please..
>>
>> Best:  mac/mc  w5mc
>>
>> On 7/20/2019 8:07 PM, thoyer via Premium-Rx wrote:
>>> Troubleshooting an RF-590 and have an issue with the 800kHz ref 
>>> output on
>>> the A12 board. The component placement drawing I have found on the 
>>> web does
>>> not match my board. My A12 board has the following part numbers on it:
>>> 10073-4700
>>>           -4709E
>>>   The component placement drawing I have is 10073-4700 Rev E. It 
>>> shows J5, J6
>>> and J10 in the upper left corner of the drawing but my board only 
>>> has J5 and
>>> J6, Plus CR9 is shown opposite of how it is populated on the pcb.
>>>   Can someone point me in the right direction please?
>>>   Thank you,
>>>   Tom
>>> W3TA
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