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 Post subject: Re: Mica Caps For Hammarlund Source
PostPosted: May Fri 19, 2017 4:42 pm 
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Joined: Jun Wed 13, 2007 4:53 pm
Posts: 206
Don't forget the micamold caps in the tuning unit and a couple of the IF transformers. The IF transformers are relatively easy to take apart to get at the micamolds. The ones in the BC-779 tuning unit require removal of the tuning unit and a side panel to get at the caps. Fortunately, the caps in my SP-400 were relocated so that they were accessible by removing the covers on the tuning unit, so much less disassembly required.

Ed W2EMN


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 Post subject: Re: Mica Caps For Hammarlund Source
PostPosted: May Fri 19, 2017 9:31 pm 
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Joined: Jan Sun 13, 2013 10:38 pm
Posts: 89
Location: Cape Cod, Ma
Ed,

For the tuning unit, are you saying that the micamolds are the AVC caps ?

Marc


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 Post subject: Re: Mica Caps For Hammarlund Source
PostPosted: May Tue 23, 2017 12:43 am 
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Joined: Jun Wed 13, 2007 4:53 pm
Posts: 206
both the AVC bypass and the B+ bypass Micamold caps are in the tuning unit. As I recall, there are 5 in the tuning unit. I learned to solder in tight places replacing bad micamold caps in my BC-779 in the early '60s- at that time I went in through the bottom. Now I'm a believer in pulling the tuning unit and replacing them through the side.

Ed


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 Post subject: Re: Mica Caps For Hammarlund Source
PostPosted: May Tue 23, 2017 12:50 am 
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Joined: Jan Sun 13, 2013 10:38 pm
Posts: 89
Location: Cape Cod, Ma
Ed,

For the Super Pro 400X, the bypass caps are external to the tuning unit. They look like they are mica as they are small and not black.

Marc


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