[R-390] Mini BNC

[Tom Frobase]

Modern miniature COAX terminated with SMA connectors using SMA to BNC
adaptors might be an acceptable substitute.  It should look good and be
cost effective.  What do you think purists! ... tom, N3LLL


On Wed, Apr 9, 2014 at 2:00 PM, Tisha Hayes <tisha.hayes at gmail.com> wrote:

> Chris,
> That is a 75 ohm connector. The R-390A connector was a bit of a freak. From
> the very old literature I had found on it there seemed to be some
> distancing from the idea of giving it any sort of electrical
> characteristics.
>
> A few years ago I went through the parts list for the R-390A and found the
> national stock number for those dratted connections. After extensive
> searching I was able to track it down to a very old catalog that showed the
> commercial (non-mil) part numbers. It seemed like an afterthought. Right
> now I cannot find what I did with that information, it is somewhere in my
> collection of stuff. The same search process can be repeated, it was
> tedious.
>
> I bought a few scrap RF decks that were doorstops at a hamfest and an IF
> deck that had been cannibalized for the filters so I picked up a set of
> plugs and connectors. I bought some of that teflon coax from eBay and made
> extension jumpers and I also made another so I could add a 9 KHz roofing
> filter (one of those little torsional filters, really cute) between the RF
> and IF decks.
>
> It was frustrating enough that I was sorely tempted to tear out those
> connectors and just put SMA connectors everywhere (that noise is Art
> Collins rolling over in his grave). I ended up not doing that because these
> poor radios have to endure enough hacks as it is.
>
> --------------------------------
>
> Yes, my callsign is a double-pun with an additional meaning AA-HA! and
> "AAay four HAy" but the HA at the end is also the first two letters of my
> last name "Hayes". In CW it makes a very distinctive sound (that some find
> confusing when sent fast, like maybe my keyer was stuck with dits). [.- .-
> ...- .... .-]. (ooh, I would really want AA4EE).
>
>
> Ms. Tisha Hayes. AA4HA
>
>  *"There are many who live in the mountains and behave as if they were in
> the town; they are wasting their time. It is possible to be a solitary in
> one's mind while living in a crowd; and it is possible for those who are
> solitaries to live in the crowd of their own thoughts."*
> *-Amma Sarah of the Desert*
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