[R-390] in rush current limiters

[Helmut Usbeck]

Interesting that you happened to bring up the Transoceanic and its ballast
tube.  The general fix in the Zenith world if you don't have the bucks for
a 50A1 is to replace the ballast tube with a 50A1 replacement which is actually a diode.
Of course the TO boys then start worring that there radio is going to lose
it's tube sound!

In my 390a I've been using a diode.  I've tried other ways except
using a 12 volt tube, which I think is a real cludge, and the $50.00
regulator which is overkill. Haven't been able to find a manufacturer that
makes a constant current diode with a high enough rating yet, which would
be a nice replacement for the 3TF7.

-Helm.  WB2ADT


On Sun, 22 Dec 2002, Kenneth Crips wrote:

> While we are on the subject of ballast tubes.  I have another radio with one
> of these pesky tubes, a Zenith Transoceanic,  and the
> infamous 50A1.  I wonder why I couldn't replace this turkey with a
> resister. Has anyone done this?  I would love the have a ballast tube free
> hamshack.
>
>
>
> Kenneth A. Crips W7ITC, Cheyenne, Wyoming
> Home of Chew Crew II, The Beezie the Beez-Bomb,
> Chic' MOB (mother of Beezie), and Cowboy Joe
> the Cheyenne Chewboy and the pard' of the yard.
>
>
>
>
> _________________________________________________________________
> The new MSN 8: smart spam protection and 3 months FREE*.
> http://join.msn.com/?page=features/junkmail&xAPID=42&PS=47575&PI=7324&DI=7474&SU=
> http://www.hotmail.msn.com/cgi-bin/getmsg&HL=1216hotmailtaglines_smartspamprotection_3mf
>
> _______________________________________________
> R-390 mailing list
> R-390@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390
>