[GreenKeys] TT-523 (was Just out of high school...)

[Jeffrey Angus]

On 7/17/17 9:04 PM, Duncan Brown wrote:
> I found the manual TM 11-5815-338-15 at
> http://radionerds.com/images/3/31/TM_11-5815-338-15.PDF
Thankies.
> and read that the TT-523  just provided low-level on the off-line tape 
> punching.
> When punching tape, it ran 68 ua through the keyboard contacts and the 
> selector
> magnets were driven with 26 VDC at 20 ma. The manual warns that the 
> keyboard
> contacts must be cleaned often!
That's kind of funny. I worked there for a year, and I never once 
cleaned the contacts.
> The original date on the TM was 23 Oct 1967, but it includes change 
> #4, dated 28
> Feb 1980; showing that the TT-523 & TT-76 were still in use in 1980 
> and expected
> to be used for a few more years.
Which makes sense, we were doing a "Pre-manufacturing" proof of 
build-ability
before someone else was given the contract to go into production.

-- 
Jeff-1.0
www.foxsmercantile.com