[Hallicrafters] SX28 hot & blue 6V6s


Paul Daulton k5wms at centurytel.net
Thu Aug 25 23:55:11 EDT 2011


Guido also check your line voltage these days the utilities run the 
line at 125 or higher in some locations. 
110 was the standard when these old receivers were designed. I like to 
run my "oldies" on a variac. All of the comments were approiate. 

Paul k5wms

Quoting Guido <laffitte at prtc.net>:
> The responses indicate that a complete 6V6s circuit component checkup is
> coming up. The monster must come out of the cage yet again. Let me see if I
> have enough time this weekend. I will report the findings. Thanks guys!
>
> 73s
>
> Guido KP4FAR
>
> -----Original Message-----
> From: Carl
> Sent: Thursday, August 25, 2011 9:22 PM
> To: Guido ; hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] SX28 hot & blue 6V6s
>
> Likely leaky input coupling caps putting some positive bias on the grids. 
> That will also take out the transformer. 
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Guido" <laffitte at prtc.net>
> To: <hallicrafters at mailman.qth.net>
> Sent: Thursday, August 25, 2011 8:40 PM
> Subject: [Hallicrafters] SX28 hot & blue 6V6s
>
>
> > Gents,
> >
> >  It has been a while since my last post but I keep a daily track of this
> > list. My SX28 had its first audio transformer replacement about two years
> > ago with two new audio tubes. These are running hot and with a clear all
> > around bluish glow. They run too hot and I don’t think this is normal
> > although we know that 6V6s tend to run with some extra heat but not this
> > much. I am sure that this has been discussed before but either I missed it
> > or my almost 59 years neurons are being depleted. Opinions will be
> > appreciated. 
> >
> > Best 73s
> >
> > Guido KP4FAR
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Paul Daulton K5WMS
beacon WMS 185.302 khz qrss30/slow 24/7
Jacksonville,Ar 72076
em34wu



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