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

[ken]

Craig C. Heaton wrote:
>
> So: Rule #1: It's your radio, your money, your time spent.
>     Rule #2: Read Rule #1.
>
> My money is to replace BBOD's with orange drops, they have a proven track
> record. I'd like my receivers to outlast me. And this should be rather easy,
> I've more to look back on than time will give me for the future. Since the
> R-390/A is belly up, might as will replace the electrolytic caps at this
> time. Then plug it in.
>
> As final food for thought we will resurrect dead horse #2, the R-390 (non
> A). This fine radio was the predecessor of the R-390/A. In the early 1950's
> the non A was deemed  costly to produce and needed a few improvements.
> Please read the following link, Cost reduction program for radio receivers
> R390/r391()urr.
>
> Please note on page 6 of this document, third paragraph, "In the field of
> components, capacitors in particular proved quite costly."
>
> http://www.r-390a.net/faq-refs.htm
>
> For some reason, the engineers which designed our beloved R-390/A chose not
> to use ceramic disc caps for bypassing, etc. There has to be a reason why it
> has such a large following and is thought to be the best vacuum tube
> receiver built!
>
> Feel free to break out the Cat "o" Nine Tails.
>
> 73's
> Craig
>
>
>
>   
Rule #1 is a good rule!

I've already completely rebuilt the Audio Deck...did that first because 
it's the easiest. To my way of thinking I just want to do it once and do 
it right. I suppose capacitor preference can to some extent come down to 
a personal choice. I've read the cost reduction report and been through 
the archives trying to gain as much information and knowledge as I can 
although after reading the capacitor discussion in the archives I came 
away with no real definitive answer other than the Orange Drops seemed 
to be favoured by many in the group.

Best 73's
Ken
ZL3AA