[Hallicrafters] R-274D/FRR Correction - HV tube replacements.

[Rodney Bunt]

Here is a source for plug in Rectifier replacements..

http://www.retrosound.com.au/Valves/Copper_Caps.htm

Remember these are AUSTRALIAN dollars, half price to the $US...

Model Replaces  Imax  Vdrop @ Imax Price 
WY3GT 5Y3GT     125ma   50V       $29.95 
WV4   5V4       175ma   25V       $29.95 
WZ34  GZ34/5AR4 225ma   17V       $29.95 
WR4   5R4       250ma   67V       $29.95 
WU4GB 5U4GB     275ma   50V       $29.95 

"The Copper Cap emulates a tube rectifier, but it does not require filament power. In the case of
a 5U4, for instance, this is a savings of 15 watts. The power transformer will run cooler and last
longer. While the filament and coating on the cathode of a tube rectifier are destined to eventual
failure, a Copper Cap will last the lifetime of the amp when used properly."

My Hallicrafters HT-32 and HT-37 power transformer runs cooler as there is no need for the 5v
fillament current on the two HV rectifiers.

Rodney
VK2KTZ


--- Roy Morgan <roy.morgan at nist.gov> wrote:
> At 09:32 PM 5/27/02 -0400, Rich Hebel wrote:
> 
> >However, I am still mystified by the S-5251 device, which is sitting in
> >the 5U4G (rectifier) socket.  Solid-state replacement for the 5U5G?
> >Anybody know?
> 
> 
> Do not be mystified.  That is likely a Sarkes-Tarzian number. I don't have 
> details handy, but it is almost certainly a solid state replacement for the 
> rectifier tube.
> 
> To find more information,
> 
> 1) The S-K company appears to have been bought out by:
> HV Component Associates (HVCA)
> <http://www.cke.com/profile.html>
> Send them an email.
> 
> 2) Search the archives of the Boatanchors listserv.
> 
> 3) go to:
> <http://www.galco.com/default.htm?/kwpages/SAR/RECT-0001.htm>
> Where you will learn little, but send them an email.
> 
> Roy
> 
> 
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
> roy.morgan at nist.gov --
> 
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