[ARC5] R-27/ARC-5 Hookup Question

[J. Forster]

An 'appendix' then maybe?

...TRADITION!

-John

==============




> All the way back to the RAT and RAV, John.  I wouldn't be surprised if
> it was also in the original Type K set rear connector as well, but I
> don't have a schematic for any of those receivers...just the overall
> system diagram at http://aafradio.org/NASM/Hmmmm.html
>
> On 7/20/2013 12:57 PM, J. Forster wrote:
>> Do earlier radios in the family also have it?
>>
>> -John
>>
>> ==========
>>
>>
>>
>>> On 7/20/2013 10:22 AM, J. Forster wrote:
>>>> I am still puzzled as to why they'd go to the trouble of bringing out
>>>> the
>>>> terminal. Some assembly line ladies spent years putting in that wire,
>>>> after all!
>>> The marginal cost of including the stripped wire in a laced cable and
>>> soldering at both ends in a production line doesn't seem very high to
>>> me, but YMMV.
>>>
>>>> If it was useful to serve as a sort of BITE it makes sense- a sort of
>>>> quick final test at the depot or radio maintenance shop- to decide
>>>> whether
>>>> the radio was OK to go in a plane or needed service.
>>> That seems to me to be a perfectly reasonable context, John.  A quick
>>> check of the five readings on the I-84 to see whether they were all in
>>> the proper range would be a way of checking the box on "okay for
>>> flight".
>>>
>>>> I don't really buy it was put in solely to test the 2x 7000 Ohm
>>>> divider
>>>> resistors.
>>> I doubt that was the sole reason...there are seldom singular drivers
>>> for
>>> such things, but it was certainly a reasonable way to make an overall
>>> check...particularly if a given receiver had a log of its five readings
>>> over time.  I'm not defending the engineering rationale for including
>>> the capability...it might have been one of those government
>>> specification gotta-dos that drifted over from the RAT, which also had
>>> the screen voltage fed to the same rear terminal.
>>>
>>>> Can anyone think of another radio that has such a provision?
>>> Don't recall any, but that doesn't mean there weren't one or two
>>> others.
>>>
>>>    - Mike
>>>
>>>
>>>
>>
>> ______________________________________________________________
>> ARC5 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/arc5
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:ARC5 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>
>