[R-390] in rush current limiters

[Walter Wilson]

So many choices, and it doesn't seem to really matter which one you choose.
They all work.  I still like putting jumpers between pins 2 and 4, and
between pins 5 and 7, and inserting a 12BH7.  It's a tube of the same size
as the 3TF7.  With a tube shield on, you can't tell the difference.

Walter Wilson - KK4DF
http://r-390a.us
(REAL Radios: R-390A, R-390, T-368E, Ranger, Thunderbolt, KWM-2A)

----- Original Message -----
From: <Llgpt@aol.com>
To: <DJED1@aol.com>; <cthulhu@fhtagn.org>; <r-390@mailman.qth.net>
Sent: Sunday, December 22, 2002 1:17 PM
Subject: Re: [R-390] in rush current limiters


> Laughing.........just in time for the holidays, the never ending ballast
tube
> thread!!
>
> Your cure parallels the ones I've used over the years Ed. It sure as hell
> won't affect anything one way or another.
>
> Merry Christmas to everyone!!
>
> Les
>
>
> In a message dated 12/22/02 11:37:58 AM, DJED1@aol.com writes:
>
> << You can pay a lot or do it another way.  Speaking of the current
> regulator- I
> replaced my dead 3TF7 with a resistor 20 years ago -didn't know where to
get
> a replacement..  I cut off the tube top, wound enough nichrome wire on the
> tube envelope to get the correct voltage drop, and fastended the nichrome
to
> the tube elements.  Cost= 0, and still going strong.  Unless you've got
> widely varying supply voltages, you'll never see the difference.  I
suggest
> you spend the $50 on a 3TF7 and put it away for when you want to sell the
> radio- "L@@K- R-390A with RARE! ballast tube".
> Ed >>
>
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