[R-390] Cardboardless Projects

Tom Norris r390a at bellsouth.net
Sat Jan 14 22:28:56 EST 2006


> Cecil Acuff wrote --
[snip]
> All of the various controversial stuff discussed on the list from  
> time to time....but none of the above conspire to do near the  
> damage to the radio than the government had already attempted to do  
> by having them out in the weather for an extended period.  Most of  
> which I feel I have reversed.
>

Bah!  Controversial or no, if it works, it works.  I would like to  
get together a solid state regulator for the 390's.  I have a couple  
decent circuits that I'll try when I run low enough on 6082's.

> I expect it to be a nicely performing radio before any additional  
> performance enhancing mods are done.  The gear train sure is slick  
> and feels wonderful.  Very easy to tune both Khz and Mhz!
>
> What are some of the other group members current winter time  
> projects.....
>
> We'd love to hear about them!

Now a new project -- 63 Imperial 390A #1 now has a 17 MC oscillator  
that isn't. It's not the tube and it's not the crystal -- but it  
*did* happen less than a day after buttoning it all up from an  
unrelated matter.
On the plus side, while I had it out I was able to get my PTO end  
point setting to w/i 100 hz, and linear across it's range.

So... lessee, 63 Imperial 390A #2 (from the SK lot) had a slipped  
clamp so I need to resynch the bandswitch, though I may be able to do  
so w/o pulling the deck.

51 Collins 390 #1 & #2 both are full of bugs, the electrical kind.

but '67 390A EAC works, so I'm not totally 390A-less.

There's the WRR-2 and the T-368 in the living room, where they may  
stay for the next few months, as well as a barn-worn SP-600 vanilla  
that I've not checked at all. (Think I fussed about that last week)

There are probably things I've forgotten about and should be doing,  
like working on the house...

>
> My next challenge will probably be an SP-600VLF that needs caps  
> under the RF deck and every tube socket replaced.....sounds like  
> fun don't it!  HA!

I'd rather roll around in ground glass and razor blades than replace  
the caps underneath the RF deck of a Super Pro.   Bleh.  FUN!

Like Cecil says, the idea is to have fun.  All but the #1 Imperial  
and the '67 EAC are projects from *last* winter.  Last winter I spent  
working on projects for a couple other folks, as did I this summer.

Argh!

73

Tom NU4G




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