[R-390] in rush current limiters

[Barry Hauser]

Boomer wrote:
> That makes sense - I don't have a 600 (yet), only a couple 500s and one
with a
> sailboat on the grill.

Sailboat on the grill!!!  That's way prior to the 500 -- the 7G605 -
pre-WWII.  That's worth some bux.  Loktal tubes I think.  I have some 8G
series -- Loktal Toob Technology also.  Some of them have as many as 8
tubes.

 In the 500 it was optional I *think*, or it was an
> afterthought. In fact, either one of the rigs I have or one I passed on
didn't
> even have a place cut in the chassis for a socket - it was just that purty
gold
> hammertone paint. [-:

> Seems they also had some kinda plug-in unit for using different voltages?
> Again, this is only on the 500. Many differing variations here, some
included
> the nifty tube clips in the back, other didn't, etc.

There was a plug-in adaptor for 220 volts that came standard with the mil
version, optional on 500 (and I think 600 series).

 They're sure not in the
> R-390 class, but I'm still amazed at how well they can suck in the
signals!

You can simulate toob TO performance by using a very good speaker in a
wooden cabinet and opening up the bandwidth to 16 khz.  Interference from an
adjacent signal -- easy, listen to something else.

Yes.  The tube TO's are very listenable radios.  I suspect a good deal of it
is due to the speaker and cabinet construction.  They're also rather quiet
between signals as you tune, which has sometimes thrown me a bit -- thought
the radio was dead.

One of these days, I'd like to put a gimmick jack in the back of one and use
it as a speaker for an R-390x.  I think some have a phono input -- maybe
could be driven from the diode load?  That would be cute, eh?
>
> BTW, I've got a couple of parts units here and (amazingly!) one of them
had a
> R-390 meter mounted in the front panel above the airplane dial. You just
never
> know!

WOW, that sounds really @RARE@.  Of course, to a collector, it's an
abomination to be abhorred.

Barry