Products > Test Equipment

Test Equipment Anonymous (TEA) group therapy thread

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Robert763:
I quite like floppies and still use 3.5" ones.
There are several bits of TE that actually need them to work e.g. various HP logic analysers.
Ther are even some aircraft systems that still use them for data updates. However like some of the SAs most have been changed to USB floppy emulators.

Vince:

--- Quote from: bd139 on June 29, 2022, 06:15:32 pm ---
--- Quote from: scl on June 29, 2022, 04:37:56 pm ---
--- Quote from: bd139 on June 29, 2022, 01:37:44 pm ---More 465B shenanigans. So I figured I'd just do a short check on the IC and see if it was pin specific. Well it was.  Only the A3 line pin 4 was short to ground which is the CH1 select line.

(snip)


--- End quote ---

74S287A looks to have the same pinout, and I see a datasheet claiming 30ns. Maybe also look at N82S129 and AM27S21.

I don't see any of those in my parts pile, and with postage from the US you are probably still better off finding one in the UK. But, if you can't, I will take another look. If did find one I could program it here too.

--- End quote ---

Thanks for suggestions. Look at those and they are a good match. But again as always I don't have the programming capability available and that will cost more money and time than just buying the part.

--- End quote ---

Oh looks like I misunderstood... I thought yuo meant that the blank/brand new 4 bit PROM was available, and that you could program it because you had this table with its contents listed... but in fact you mean that you can get the pre-programmed part, so it's ust plug and play, no need to program anything ?!
Why are even talking about alternatives then... just get the freaking chip and report on your success...
23 quid to solve the problem in the most suitable and elegant way, as well as the quickest and easiest... sounds like good value for money to me ?!  :-//

Hit that Buy button and type in that credit card number...

Cubdriver:

--- Quote from: bd139 on June 29, 2022, 06:04:57 pm ---Ah watercooling. Never had any problems with that here because I never bothered with it  :-DD

--- End quote ---

In the grand scheme of things, aren’t they ALL air cooled in the end?

-Pat

bd139:

--- Quote from: Cubdriver on June 29, 2022, 06:57:26 pm ---
--- Quote from: bd139 on June 29, 2022, 06:04:57 pm ---Ah watercooling. Never had any problems with that here because I never bothered with it  :-DD

--- End quote ---

In the grand scheme of things, aren’t they ALL air cooled in the end?

-Pat

--- End quote ---

Exactly. Why stick a Rube Goldberg machine in the process  :-DD

bd139:

--- Quote from: Vince on June 29, 2022, 06:51:55 pm ---
--- Quote from: bd139 on June 29, 2022, 06:15:32 pm ---
--- Quote from: scl on June 29, 2022, 04:37:56 pm ---
--- Quote from: bd139 on June 29, 2022, 01:37:44 pm ---More 465B shenanigans. So I figured I'd just do a short check on the IC and see if it was pin specific. Well it was.  Only the A3 line pin 4 was short to ground which is the CH1 select line.

(snip)


--- End quote ---

74S287A looks to have the same pinout, and I see a datasheet claiming 30ns. Maybe also look at N82S129 and AM27S21.

I don't see any of those in my parts pile, and with postage from the US you are probably still better off finding one in the UK. But, if you can't, I will take another look. If did find one I could program it here too.

--- End quote ---

Thanks for suggestions. Look at those and they are a good match. But again as always I don't have the programming capability available and that will cost more money and time than just buying the part.

--- End quote ---

Oh looks like I misunderstood... I thought yuo meant that the blank/brand new 4 bit PROM was available, and that you could program it because you had this table with its contents listed... but in fact you mean that you can get the pre-programmed part, so it's ust plug and play, no need to program anything ?!
Why are even talking about alternatives then... just get the freaking chip and report on your success...
23 quid to solve the problem in the most suitable and elegant way, as well as the quickest and easiest... sounds like good value for money to me ?!  :-//

Hit that Buy button and type in that credit card number...

--- End quote ---

Yup. Going to buy it once I’ve replaced the capacitor in the HT, put the case back on and tested it.

One thing I’ve learned when repairing stuff is do the cheaper repairs first before you find out it’s totally fucked somewhere you didn’t expect  :-DD

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