There was a reason all those old movies, when they had to show a computer, 
showed a bank of 3420's all spinning the tapes.

Jerry Whitteridge
Sr Manager Managed Services
Tech Operations & Innovation
[email protected]
480 578 7889

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Pommier, Rex
Sent: Friday, June 27, 2025 9:26 AM
To: [email protected]
Subject: EXTERNAL Email: Re: [EXTERNAL] Re: 3420 environmentals?

Or with the 3480 autoloaders, "Hey look, it automatically loaded the next 
tape!"  Ooh, ahh!   Don't get me wrong, they were a cool technology upgrade but 
pretty unimpressive to watch them in action compared to seeing the 3420s 
start/stop and hearing the flapping sound when a tape rewound off the takeup 
spool.

Rex

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Phil Smith III
Sent: Friday, June 27, 2025 11:18 AM
To: [email protected]
Subject: [EXTERNAL] Re: 3420 environmentals?

Ah, makes a LOT more sense to show something on a reel drive! On 34x0 it's more 
like "Listen, you can hear the tape rewinding..."

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Seymour J Metz
Sent: Friday, June 27, 2025 10:55 AM
To: [email protected]
Subject: Re: 3420 environmentals?

> With 3480s one could make an interesting "show" for visiting executives.

ITYM 3420 or older.

> Remember the oscillating sort?

I suspect that most folks here are too young for oscillating or poly.

--
Shmuel (Seymour J.) Metz
https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!KjMRP1Ixj6eLE0Fj!v6pClp0gWWWINGEcBT7VvLUjWW2BZQd8ZBB-eilZ8kcTDbHtIr8hm0MlZfp1prQUWRCI59GGhrAzUHw$
עַם יִשְׂרָאֵל חַי
נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר




________________________________________
From: IBM Mainframe Discussion List <[email protected]> on behalf of 
[email protected] <[email protected]>
Sent: Friday, June 27, 2025 10:26 AM
To: [email protected] <[email protected]>
Subject: Re: 3420 environmentals?


External Message: Use Caution


>3420 tape drive had power supplied by IBM 3803 Tape Control. 3420
>itself haven´t a direct connection to an installation energy point, 3803 has 
>it.

I remember the bunches of cables involved with the 3420s+3803, but I did not 
remember the exact arrangement. As we have said, it was a long time ago.  (And 
yes, the 3490-type tape cartridges are as handy — except it was seldom that 
there were as many of these just lying around waiting to be used. Of course, 
that depended on the type of installation involved, etc, etc.)

With 3480s one could make an interesting "show" for visiting executives. 
Remember the oscillating sort?

Bill Ogden


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