Heathkit ETA-3400 vs. ETW-3400 confusion?

[william degnan]

http://www.vintagecomputer.net/browse_thread.cfm?id=553

Here are my notes.

Bill Degnan
twitter: billdeg
vintagecomputer.net
On Jun 5, 2016 8:06 PM, "drlegendre ." <drlegendre at gmail.com> wrote:

> Which is the correct model number for the I/O & memory accessory for the
> Heath ET-3400(A) trainers?
>
> I see ETA-3400 and ETW-3400 used interchangeably. For instance, the d/l
> manuals refer to the unit as ETA-3400 but many (most?) units, mine
> included, are screened ETW-3400 on the case.
>
> Anyone know what gives with this? Are there actually two different models
> or revisions, as with the ET-3400 and ET-3400A?
>
> Also, is there a way to tell if a Heath piece is factory-built? My
> recently-acquired ETW/A-3400 has a board which almost +must+ have been wave
> soldered and washed. It has no traces of home-assembly. Likewise, the rest
> of the build is top-notch and looks like factory work..
>
> Thoughts?
>
> PS Still need a 2x20 header (like 40pin IDE) to complete this project.
> Anybody got a spare?
>