[Premium-Rx] WJ HF-1000 questions

[Kai Garrels]

Hello Heinz,

regarding the battery: I had an empty one, the receiver would respond with a ram fail message, but it still worked, probably forget memories, not sure.
I replace it in 2011 with a DS1643-100+-ND from digikey, worked ok. Not sure of they are available still, maybe on ebay (with some risk that they are used ones).
youtube show some people repairing the Dallas chips, it looked a bit adventurous to me :), bit if all else fails...

Regarding ROM versions: what does the receiver say after BITE?
I can look up my versions per chip if you like, just send a private mail.

Best regards,
kai

PS: I also would be willing to sell my HF-1000, upgraded to an R&S EB500. If anybidy is interested, I can send pictures, local pickup in Mannheim +- 100km preferred.


> Hello,
> last Saturday I found a Watkins-Johnson HF-1000 at a swapmeet in Bavaria/Germany. It is serial #176X and has the preselector installed.
> 
> I checked the ROM versions and found: 
> Front panel ROM A1A1U3 is 1.21 which is standard for all.
> Processor ROM A2U12 is 04.01.06 which is late but not the latest version.
> DSP ROM A2U56 is 04.02.07 which is the latest version.
> 
> Would my HF-1000 benefit from the latest processor ROM? Would it even work in my receiver?
> 
> I am a bit worried about the DALLAS NV RAM chip which is no longer available. On the N9EWO website it is stated that the receiver will be (permanently?) dead when the battery inside the DALLAS NV RAM chip is exhausted.
> Is this really true? What does owners use as a replacement?
> 
> Thanks for your help.

> vy 73 Heinz DH2FA, KM5VT