[R-390] The OD discussion (Dead Horse Walking)

[rbethman]

Since I was born in 1950, I have NO clue what was or was not available.

I've received E-mail regarding "rhetoric" on BBODs.

I replied directly.  The specific response was that I attempted to 
replace all BBODs EXCEPT for the bypass ones in an SX-101A.

Guess what?  This cost me a mixer transformer and stage.

Smart wiseman with 20/20 hindsight:  Get RID of them!

Bob - N0DGN

Flowertime01 at wmconnect.com wrote:
>
> Craig said,
>
> > For some reason, the engineers which designed our beloved
> > R-390/A chose not to use ceramic disc caps for bypassing,
> > etc.
>
> The year had something to do with it.
>
> Ceramic disc with mil spec ratings were not yet in existence.
>
> I am not sure Ceramic disc caps even existed in 1950.
>
>
>> During the design process, life is a multi choice test. You may only 
>> choose answers from a select list of available parts.
>>
>> Available parts being defined as existing in a mil spec catalogue.
>>
>> Collins was waging a paper struggle to get lots of R390 parts in the 
>> mil spec approved list. They just saw no need to fight the process 
>> for caps.
>>
>> Sheet metal and gears are one thing. sort of give me's.
>>
>> The mechanical filters were a bit more effort.
>>
>> The caps were just to accept what was listed.
>>
>> This was a cost reduction program.
>>
>> Roger AI4NI
>
>
>
> ------------------------------------------------------------------------
>
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390

-- 
Bob - NØDGN