AK 40 restoration

View previous topic View next topic Go down

AK 40 restoration

Post by CharlesD on Fri Apr 17, 2015 8:02 pm

Hi, all.  My AK 40 is back together, and plays well, with good room volume, on my roughly 75 foot antenna.  My question - one of the audio transformers was open, so I replaced it with on from Antique Radios.  When I removed the old one from the can, by heating it in the oven, I found that most of the winding turns were not only open, but appear to have segments of each turn, about 1/2 inch or so, missing, completely gone.  Anybody have any ideas how this happened?  (They were not stuck to the inside of the can.)  Thanks.  Charles Stevens

CharlesD
New Member
New Member

Number of posts : 8
Registration date : 2015-03-25

Back to top Go down

Re: AK 40 restoration

Post by Bill Cahill on Fri Apr 17, 2015 8:08 pm

My guess is that dampness in the tar corroded all of them open. You might expect more problems like this in the future. It was likely stored in a dam p place for a long time......

_________________
Please also join us here;  http://videokarma.org/index.php
avatar
Bill Cahill
Admin
Admin

Number of posts : 4538
Age : 66
Registration date : 2008-03-12

Back to top Go down

Open windings

Post by CharlesD on Fri Apr 17, 2015 8:27 pm

Bill - You're probably right.  The metal cabinet has some slight rust where the paint is chipped.  And in reference to your earlier comment, I have replaced all the caps in the power supply and in the main chassis, and all of the non-wirewound resistors.  On some of those I had to clean the ends of the turns and the underneath side of the screws to get the resistance to read the proper value.  Thanks again for your help.  Charles

CharlesD
New Member
New Member

Number of posts : 8
Registration date : 2015-03-25

Back to top Go down

Re: AK 40 restoration

Post by Bill Cahill on Fri Apr 17, 2015 8:51 pm

I'm happy you got it working again....

_________________
Please also join us here;  http://videokarma.org/index.php
avatar
Bill Cahill
Admin
Admin

Number of posts : 4538
Age : 66
Registration date : 2008-03-12

Back to top Go down

Re: AK 40 restoration

Post by 75X11 on Sat Apr 18, 2015 2:40 pm

Congratulations on your restoration! Please put up some pictures so we can see it.
avatar
75X11
Member
Member

Number of posts : 4900
Age : 61
Registration date : 2013-03-10

Back to top Go down

Re: AK 40 restoration

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum