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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc.

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Old 28th Apr 2021, 5:56 pm   #1
BrianAllen
Hexode
 
Join Date: Nov 2018
Location: Great Dunmow, Essex, UK.
Posts: 337
Default Bush AC 81 C4/C6 Caps Difficult to Replace

Good evening all.

There are 2 wax caps C4/0.1 and C6/0.05 on my AC81 that are very difficult to gain access to. Although they look in good condition, should I make the effort to replace them?

C4 is V1 AVC Line Decoupling and C6 is V1 Sg's and Osc Anode Decoupling if this helps.

Brian
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Old 28th Apr 2021, 6:25 pm   #2
PJL
Dekatron
 
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 4,894
Default Re: Bush AC 81 C4/C6 Caps Difficult to Replace

C4 is a must replace as it is on a high impedance circuit. C6 should be OK if the SG voltages are good but remember to allow for the loss of AVO loading when checking against the service documentation.
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Old 28th Apr 2021, 7:06 pm   #3
BrianAllen
Hexode
 
Join Date: Nov 2018
Location: Great Dunmow, Essex, UK.
Posts: 337
Default Re: Bush AC 81 C4/C6 Caps Difficult to Replace

Thank you PJL.

Brian
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