[R-390] Re 26Z5 replacement

[Barry]

I have connected that 12.6V tap to the "low" side (pin 7) of the 3TF7 tube.
Provided the voltage to your radio is fairly constant, it eliminates the
need for the 3TF7.

Barry - N4BUQ

----- Original Message -----
From: "pete williams" <jupete at bigpond.net.au>
To: <r-390 at mailman.qth.net>
Sent: Saturday, May 27, 2006 1:22 AM
Subject: [R-390] Re 26Z5 replacement


>
>
>  1.  Thanks to those who referred me to suppliers of  roll pins -- One
> kind  soul says he can  help.
>
> 2, Not having to  do it  yet, but if  one decides to use  tubes in
> lieu of 26Z5's  or Si diodes, is their any reason why 6BW4's could NOT
> be used instead of the  12 BW4 as outlined in a recent post.
>
> Reason for  suggesting is that the 12BW4 seems to be  non existent  at
> this  time - 6BW4 still available . The power xfmr has a 12 V tap
> unused at terminal #9. Rewiring to put the  fils in series  may not
> cause   a load problem especially if  ovens  not  used. The  seriesed
> fil  current would be 0.9  amp .
> Any prohibitions ?
>  Cheers
>  Pete
> Pete D . Williams
> METUNG 3904
> Australia
> jupete at bigpond.net.au
>
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