[ARC5] Restoring a BC-455-b, request advices

[Bruce Long]

I do not know the voltage rating required for the 3uf  butI am sure if you get stuck you can find a suitable 2.7 or 3.3 ceramic surface mount capacitor that will fit.  Mount it on a small piece of clad scored with a knife to make two pads.  Tell me the voltage rating you need for the cap and I will make you one  If I have a suitable cap at work.   I know we have 10uF and I think 2.2uf.


      From: J Mcvey via ARC5 <arc5 at mailman.qth.net>
 To: "paolo.gramigna at controllo.it" <paolo.gramigna at controllo.it>; Glen Zook <gzook at yahoo.com>; "arc5 at mailman.qth.net" <arc5 at mailman.qth.net> 
 Sent: Sunday, May 1, 2016 1:28 PM
 Subject: Re: [ARC5] Restoring a BC-455-b, request advices
   
I think c30 is the 3 uf on the AGC line? I used an electrolytic there. What is the C5 value? Almost all can be replaced with mylar. In fact, you can get 3.3uf in mylat non polar, but will it fit in the can?  Yes, replace the caps with the same value.
If you are good with soldering, you can make the seam very inconspicuous, looking  like it was part of the manufacturing process.The "pots" are brass and solder very easily.
 

    On Sunday, May 1, 2016 11:46 AM, Paolo Gramigna <admin at controllo.it> wrote:
 

  Thanks for the prompt answers!
 just to be sure... 
 are the higher value capacitors (C5 or C30, for example) electrolytic capacitors, or paper ones?
 I see that the value indicated on the "tin pot" is sometimes different from the value I see in the schematics I have.
 I'll guess that it's better to follow the value on the "tin pot". Am I correct?
 
 Thanks again...
 
 IK4YNG Paolo
 
 
 
 I will try to save the "tin pots" and I'll place the new caps inside them, si the look of the receiver will not be spoiled too much...
 
 Il 01/05/16 17:05, Glen Zook ha scritto:
  
  Replace the capacitors!  It can make a BIG difference in the performance as well as protecting from damage caused by leaky / shorted capacitors. 
  
    Glen, K9STH  
  Website: http://k9sth.net 
 
        From: Paolo Gramigna <admin at controllo.it>
 To: arc5 at mailman.qth.net 
 Sent: Sunday, May 1, 2016 3:09 AM
 Subject: [ARC5] Restoring a BC-455-b, request advices
  
 Hi all,
 I'm a newcomer here. I just acquired a complete (less dynamotor) and 
 good-looking BC-455-B and I would like to restore it to good working 
 conditions. I'm planning to use it in order to listen to the few 
 remaining broadcasting stations, while enjoying the sound of a truly 
 vintage radio.
 
 I have seen several posts in the web suggesting to replace the 
 capacitors, especially the electrolytic ones, with modern ones. That 
 will cause big detriment to the authenticity, but probably will be 
 beneficial to the functionality.
 
 What is your wise advice?
 
 thanks!
 
 
      
 
 
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