Re: 8921A PCBs required
Thanks Robert, Just give me a shout when you get to it, If you do not find it, say in a month or so, please let me know . I have the same trouble ... life time of "Accretions". 73s? Bill M.
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William Macham
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#772
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Re: 8921A PCBs required
No, nothing from Rick I checked my workshop stash and I don't have those modules. I'l have to go to the storage unit and check there (I seem to be missing a box of modules, it's not where I thought it
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Robert G8RPI
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#771
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Re: 8921A PCBs required
Hi Robert, Has Rick mentioned any issue with your offer, directly to you ? He is still assisting me with advice on eproms etc. I think we are not going to impact on his turf. I am not commercial, just
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William Macham
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#770
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Re: 8921A PCBs required
Thanks Rick, Will do. Bill M.
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William Macham
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#769
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Re: 8921A PCBs required
Hi Rick Are you aware that all EEPROM's have a limit on the maximum number of erase/write cycles they can perform before they fail. You should find this information buried in their specifications.
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george edmonds
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#768
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Re: HP 8920A/B, 8921A LCD/VGA Out
I¡¯ve had luck with repairing power switch rods on that go over a square switch actuator using dental floss or lacing cord as a binder. * From:* opelgtalex <aszuski@...> *Sent:* Monday, July
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Ed Marciniak
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#767
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Re: HP 8920A/B, 8921A LCD/VGA Out
Hank, Cockpit error trying to do it on my phone. My eyes aren't pointy enough. On my shoppe desktop it comes through great. Thanks, :) Burt
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Burt K6OQK
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#766
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Re: HP 8920A/B, 8921A LCD/VGA Out
Could the power button rod be made with a 3d printer?? Just a thought Steve Flory W9KOP
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Steve Flory
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#765
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Re: HP 8920A/B, 8921A LCD/VGA Out
One other thing to mention: When you pull of the front panel assembly off be extremely careful with the power button rod -- I taped mine with polyimide tape to the unit itself in several spots and
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opelgtalex
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#764
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Re: HP 8920A/B, 8921A LCD/VGA Out
Hello, From memory, and having done 2 of the conversions, it's pretty straightforward. I probably went overboard in writing this reply, but I thought I would be as detailed as I could remember. If you
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opelgtalex
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#763
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Re: HP 8920A/B, 8921A LCD/VGA Out
Hi Alex I bought the kit and intend to do the same soon. Were there any special precautions you took in regards to the CRT removal? Thanks Dave KA6BFB
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David Dowler
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#762
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Re: HP 8920A/B, 8921A LCD/VGA Out
That looks so good. I need to save up for that kit.
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Steve
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#761
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Re: 8921A PCBs required
Hi William, The 8921 and 8920 have basically the same eeprom so they can be interchanged. We have had several cases of "non-recoverable firmware error" on boot up due to corrupt eeproms. I don't
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[email protected]
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#760
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Re: HP 8920A/B, 8921A LCD/VGA Out
Burt, Are you having trouble reading the posts?? Alex in his last post nicely provided links to both the company website and the listing (a giant url string) on ebay.
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Hank Riley
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#759
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Re: HP 8920A/B, 8921A LCD/VGA Out
Alex, Yes, I did mean "Alex."? :) Yes, your VGA bracket came out looking like a machine stamped insert.? My big concern is that from certain look angles it might make it hard to see. Where did you
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Burt K6OQK
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#758
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Re: HP 8920A/B, 8921A LCD/VGA Out
Burt, I think you mean me, not Steve. The LCD display is better in all ways, nothing to complain about whatsoever, I cannot find one thing I dislike. The VGA out was made by hand from some 1/8"
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opelgtalex
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#757
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Re: HP 8920A/B, 8921A LCD/VGA Out
Steve, This looks great. Two questions...? How tight is the viewing angle, and where did you find the adapter plate that fits in the "option" connector hole that accepts a VGA connector. Thanks,
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Burt K6OQK
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#756
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Re: 8921A PCBs required
Ahh ... I did not change the eeprom onto the other board. I have taken a snapshot of the eprom, some time back, into my win 7 computer via an eprom burner. Did a checksum after I did it on each, and
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William Macham
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#755
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Re: 8921A PCBs required
Hi William, when you swapped the controller boards, did you keep the eeprom with the problem unit? I suspect the non recoverable error is from the calibration eeprom on the controller board. Rick
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[email protected]
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#754
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Re: 8921A PCBs required
Hi Robert, Many thanks for your interest in my problem. My ham call sign is VK6IC, although I was VK6II. That lapsed during a Covid problem at our Federal Comms office. I had the call since 1983. I am
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William Macham
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#753
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