[Premium-Rx] WJ8712-1 >> WJ8712P

Sun May 13 14:37:09 EDT 2018

Hi Terry & all,

Sorry about the delay. The WJ-8712P Intermediate Level Maintenance Manual (May 2000 issue) is now on this link on Dropbox:

https://www.dropbox.com/s/a84gq1do98bc52s/WJ-8712P%20Manual%20Intermediate%20Level.pdf?dl=0

Good luck!

73 de OJS

-----Original Message-----
From: premium-rx-bounces at mailman.qth.net <premium-rx-bounces at mailman.qth.net> On Behalf Of Terry G0EZY
Sent: Thursday, May 03, 2018 10:14 PM
To: Premium-Rx at mailman.qth.net
Subject: Re: [Premium-Rx] WJ8712-1 >> WJ8712P

Hi OJ and Dave  thanks for your emails and offers of help.

OJ -  given the rarity of the 8712P it is interesting to know that you have one! Also, thanks for offer of photos. I already have good photos of the top and bottom of an 8712P with the covers removed. These don't really show the mechanism of attaching the front panel to the side panels for comparison with the 8712-1. What I really need to see is the front panel removed but that is too much to ask you to do!! If your Intermediate Manual is specifically for the 8712P with a description and circuit of the front panel controller it would be very helpful. I have an Intermediate Manual that covers the 8712-1 and 8712A but it doesn't, of course, give any info about the control panel. I'm not sure if my email service would accept a 9MB file - do you have Dropbox or equivalent method of exchanging large files?

Dave - I was encouraged to bid for this by a mutual friend. He warned me how much to expect the bidding to reach as they are so rarely up for sale. Interesting to know I was competing with you - it was obvious the other bidders knew its value. The 8712-1 seems to have all the connections ready for a 8712P panel. A spare DC power cable with plug was folded back unused. It just need to be unfolded and routed past the PSU to the front panel and the plug fitted to J1. The 8712-1 multi-way ribbon coming from the digital board via the power distribution board to the internal 25 way D connector could be removed and the Multiway from
E1 on the 8712P panel could be fitted to the digital board - assuming it it was supplying the power via the J1 plug.

If all else fails, maybe I should do the same as you and connect the front panel using the internal 25 way D connector. Doing that I could follow your example and arrange switching to control both of my 8712-1s.

Thanks again both

73 Terry

On 02/05/2018 17:36, Odd-Jorgen Sagdahl wrote:
> Hi Terry,
>
> I am not a WJ expert, but I do have a couple - of them one 8712P. I 
> have the Intermediate Manual that I could send you (if you can receive a 9 MB PDF).
> My 8712P is packed and stored, but if nobody else can help, and it 
> could be useful for you, I could unpack it and provide you with photos 
> of the front panel details.
>
> 73 de OJ in Norway
>
>
> -----Original Message-----
> From: premium-rx-bounces at mailman.qth.net
> <premium-rx-bounces at mailman.qth.net> On Behalf Of Terry G0EZY
> Sent: Wednesday, May 02, 2018 5:38 PM
> To: Premium-Rx at mailman.qth.net
> Subject: [Premium-Rx] WJ8712-1 >> WJ8712P
>
> I am hoping WJ-8712 experts can help me with this.
>
> Recently, I purchased on eBay (UK) a WJ-8712P front panel. It had been 
> built as a sort of remote head unit with a custom-made box milled out 
> of a solid resin block. It had been fitted with a 37 way connector. 
> The mains on/off switch had been replaced with a green indicator. The 
> eBay seller could not (or would not) reveal where this unit had come from.
>
> I have a couple of WJ8712-1 and was hoping I could convert one of them 
> into a WJ8712P by "simply" replacing the 8712-1 front panel with the 8712P panel.
> Unfortunately, it doesn't seem to be a simple replacement.
>
> The 8712P panel is the same size as the 8712-1 panel and has the same 
> fixing holes. It looks like it would fit but the side-panel lips 
> (which hold the captive nuts to secure the front panel) prevent the PC 
> boards and the controls on the left hand side from going through. No 
> matter how you angle or turn the front panel, those lips stop the front panel going in.
>
> Is there a trick to fitting the front panel of a P, or are the chassis 
> different for the two versions? The 8712-1 side panels are rivetted to 
> the cross panels, so no chance to open them out temporarily just to 
> get the PC boards through.
>
> I have checked to see if the P Panel will work with the 8712-1 boards. 
> I haven't got a /P manual but all the connections seem to be there and 
> the Panel came with the original multiway cable to connect to the digital board.
> On power up the P panel displayed the last frequency I had used on the
> 8712-1 but there was no response to tuning or pressing buttons.
> This might be a fault, wrong connections, incorrect commands or the P 
> panel isn't compatible with the 8712-1 boards or firmware....
>
> I have returned the original front panel to the 8712-1 and checked the 
> test hasn't wrecked anything...
>
> Would appreciate knowing whether I am wasting my time with this 
> project or any suggestions to obtain a successful conversion.
>
>
> 73 Terry G0EZY
>
>
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