[Hallicrafters] ebay SX-88 - Wow!

[Julian Bunn]

I think the leaky old caps just sound better on AM. Those modern
Orange Drop things sound so clinical and lifeless :-)

In my limited experience, the old resistors (especially the higher
value ones) in these Hallicrafters are usually way off, too: so much
so that it always makes me wonder how the circuit can work at all,
even poorly. Perhaps it's not so critical after all?

Julian


rbethman wrote:
> I don't have any weird beliefs regarding those old caps.  The biggest 
> problem I've had is when replacing "some", that I've had to adjust their 
> values with the newer film type capacitors.  I have attributed most of 
> it to the broad tolerance of the old parts from day one.
> 
> You would find ranges of -20% through +80% and much worse in the old 
> plastic tubular paper caps.  Yes, they ALL leak now.  I don't know how 
> good they really were, but that's what some manufacturer's used.
> 
> As to what voltage is or isn't on them, it won't matter!  They are a 
> mess with failure a sure thing if left in there.
> 
> He'd be better off with either restuffing the old ones, or simply 
> replacing them too.
> 
> Bob - N0DGN
> 
> HallicrafterSX28 at aol.com wrote:
>> so do the AVC and Cathode bypass caps they don't have any significant  
>> voltages across them either but they are plagued with leaakage just  like all 
>> the other capacitors in the rcvr.
>> Regards
>> Nick
>>  
>>  
>> In a message dated 10/28/2009 3:17:54 PM Pacific Daylight Time, WA1KBQ  
>> writes:
>>  
>> That's not  correct, they tested OK probably because they don't have 
>> voltage on them.
>>
>>  
>> Regards, Greg
>>  
>>  
>> In a message dated 10/28/2009 3:04:09 P.M. Atlantic Standard Time,  
>> hallicraftersx28 at aol.com writes:
>>
>>
>> Interestingly the guy didn't replace  the black  beauities mounted on the 
>> wafer switches (that control the IF passband).They  are just as bad as the 
>> other.
>> Nick
>>
>>
>> -----Original  Message-----
>> From: Julian Bunn <Julian.Bunn at caltech.edu>
>> To:  radioart at frontiernet.net
>> Cc: w9xf at comcast.net; List Hallicrafters  <hallicrafters at mailman.qth.net>
>> Sent: Wed, Oct 28, 2009 11:41  am
>> Subject: Re: [Hallicrafters] ebay SX-88 - Wow!
>>
>>
>>
>> Yes,  superb. Looks pristine. I'm an SX-88 novice: what are the  unlabelled
>> hrome knobs beneath each tuning dial used for?
>> If I had  this, plus the Tek 570 tube tester currently on auction, I would
>> ie  happy.
>> Julian
>>
>> radioart at frontiernet.net wrote:
>> Guy did a nice  job restoring it....  Looks better than NEW!
>>
>> Dennis  Petrich
>> Amateur Radio Station K0EOO
>> Lakeville Minnesota  USA
>> k0eoo at arrl.net
>> 952-898-1082
>>
>> ----- Original Message  -----
>> From: w9xf at comcast.net
>> To: List Hallicrafters  <hallicrafters at mailman.qth.net>
>> Sent: Wed, 28 Oct 2009 18:22:13  +0000 (UTC)
>> Subject: [Hallicrafters] ebay SX-88 - Wow!
>>
>> Way too  rich for my blood, but it looks like someone did a lot of detailed 
>>  
>> estorative work on it. 
>>
>> 73, 
>>
>> W9XF  
>>
>>
>> http://cgi.ebay.com/HALLICRAFTERS-SX-88-TIME-MACHINE-RESTORED-TO-PERFECTION_
>> W0QQitemZ110450151577QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item19b75790
>> 99  
>>   
>>>  ______________________________________________________________
>>>     
>> Hallicrafters  mailing list
>> Home:  http://mailman.qth.net/mailman/listinfo/hallicrafters
>> Help:  http://mailman.qth.net/mmfaq.htm
>> Post:  mailto:Hallicrafters at mailman.qth.net
>>
>> List Administrator: Duane  Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **  
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support  this email list:  http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Hallicrafters  mailing list
>> Home:  http://mailman.qth.net/mailman/listinfo/hallicrafters
>> Help:  http://mailman.qth.net/mmfaq.htm
>> Post:  mailto:Hallicrafters at mailman.qth.net
>>
>> List Administrator: Duane  Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **  
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support  this email list:  http://www.qsl.net/donate.html
>>
>> _____________________________________________________________
>> allicrafters  mailing list
>> ome:  http://mailman.qth.net/mailman/listinfo/hallicrafters
>> elp:  http://mailman.qth.net/mmfaq.htm
>> ost:  mailto:Hallicrafters at mailman.qth.net
>> List Administrator: Duane Fischer,  W8DBF
>> * For Assistance: dfischer at usol.com ** 
>>
>> his list hosted  by: http://www.qsl.net
>> lease help support this email list:  http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Hallicrafters  mailing list
>> Home:  http://mailman.qth.net/mailman/listinfo/hallicrafters
>> Help:  http://mailman.qth.net/mmfaq.htm
>> Post:  mailto:Hallicrafters at mailman.qth.net
>>
>> List Administrator: Duane  Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **  
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support  this email list:  http://www.qsl.net/donate.html
>>
>>
>>
>>
>>
>> ______________________________________________________________
>> Hallicrafters mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Hallicrafters at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com ** 
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>   
>