[time-nuts] HP 5370A to B conversion
It's not practical to convert an A to a true B model. They use a different input front end circuit. But, the rest of the machine is compatible. The B firmware runs on a A. John's CPU board works on either version. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5370A to B conversion
There really is no need to convert it to a B unit, as the A unit has the same specifications. If you put John Seamons' BBB CPU card in it, it will simply sing as far as speed goes, and you can use the A or B virtual roms as you wish. The principle difference is the B analog boards are easier to calibrate, and, have a different range of threshold settings on the front panel knobs.. -Chuck Harris Perry Sandeen via time-nuts wrote: List, I won a 5370A from ebay. Though it seems to be missing the A channel level knob, the unit was shown powered up with the correct 0.0 on the display, although the unit was sold as non-working for parts or repair. But the price was right with a best offer accepted. So assuming (gulp) that the unit works after fixing the A channel problem. is it practical or desirable to convert this to a B unit? I have one of the new processor boards with the BBone option that I can use in the unit. Advice requested. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5370A to B conversion
In message blu170-w435e764addfe88a3a4ebeece...@phx.gbl, Mark Sims writes: It's not practical to convert an A to a true B model. They use a different input front end circuit. But, the rest of the machine is compatible. The B firmware runs on a A. John's CPU board works on either version. The only differene in the software is a single byte fix for an obscure race-condition. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5370A to B conversion
I saved a bunch of 5370A boards from being sent for gold scrap at a recent TRW swap meet. A lot of the boards are common to both A and B versions. If anyone has a need for any particular board, let me know off list please. Nothing from the front panel. Dan ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5370A to B conversion
There is a mod on the A model which was fixed in the B version. As I recall, it was to reduce cross-talk. Bruce the almighty might recall better than me. I would recommend Perry to apply the BBB based CPU-boards. Good use of the hardware at hand. Cheers, Magnus On 12/19/2014 02:55 PM, Chuck Harris wrote: There really is no need to convert it to a B unit, as the A unit has the same specifications. If you put John Seamons' BBB CPU card in it, it will simply sing as far as speed goes, and you can use the A or B virtual roms as you wish. The principle difference is the B analog boards are easier to calibrate, and, have a different range of threshold settings on the front panel knobs.. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] HP 5370A to B conversion
List, I won a 5370A from ebay. Though it seems to be missing the A channel level knob, the unit was shown powered up with the correct 0.0 on the display, although the unit was sold as non-working for parts or repair. But the price was right with a best offer accepted. So assuming (gulp) that the unit works after fixing the A channel problem. is it practical or desirable to convert this to a B unit? I have one of the new processor boards with the BBone option that I can use in the unit. Advice requested. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
