[R-390] R390A help, RT301 current regulator tube

[Roy Morgan]

Short circuit the regulator znd install 12-volt equivalents for the two tubes it operates. (PTO and one other tube)

Roy Morgan
K1LKY Western Mass
K1LKY68 at gmail.com

> On Dec 25, 2021, at 4:28 PM, Studiumtelecom S.Rocha <battcharger at gmail.com> wrote:
> 
> Dear members,
> 
> I am restoring an  R-390 /URR Amelco serial 1596 and the V505 and  V701
> 6BA6 do not have the filament voltage, so I would like to know how to
> replace the RT301 current regulator tube.  Any other suggestion will be
> greatly appreciated !
> 
> Merry Christmas  and a much better New Year for all  !
> 
> Regards,
> Sam Rocha
> Py1dkw
> 
> Em sáb, 25 de dez de 2021 04:53, Larry H <larry41gm at gmail.com> escreveu:
> 
>> I have updated our website's (r-390a.net) 'references' page.  I added a
>> link to the Navy's R-390As tech ref of Apr, 1970 on  Nick England's
>> website.  The link is at the bottom of the 'US Navy Manuals' section in
>> our 'references' page.
>> 
>> I have also added meter face files, a TIF file for the VU meter face and a
>> Visio file containing 'white' faces for the VU and C/L meters.  All
>> these can be found on the 'references' page on our website in the
>> 'drawings' section.  They also have matching PDF files for viewing as the
>> Visio and TIF files are only downloadable (oooops, I forgot the PDF file
>> for the TIF file - I'll add it in soon).
>> 
>> Happy Holidays.
>> 
>> Regards, Larry
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