Bad caps in most Ampex AG440 - MM1000 - MM1100 - MM1200 tape recorders
Caps to Replace on your Ampex AG 440 - MM1000 - MM1100 or MM1200 Tape Recorder !!
I'm finding that most 440's, MM1000's, MM1100's and MM1200's are now at the age
where a lot of the electrolyics in the Audio Cards are begining to leak
and go bad.
This may show up a a loss of over-all level, a loss of low frequency signals,
cards not working correctly and other probelms.
So in the older Ampex machines I recommend you replace the following caps:
All CAPS should be 105 degree temperature caps for longer life
RECORD CARD: C28 10uf 25 volts (replace with 10uf 50 volt caps)
REPRODUCE CARD: C13 and C8 50uf 50 volt (replace with 50uf or 47uf 50 volt caps)
Note these are AXIAL electrolytic caps - the leads are connected to each side of the cap!!
You MUST make sure to install these caps with the correct polarity !!!!
The above mentioned caps are the EASY ones to replace.....
there are other caps you 'should' replace,
but they are MUCH MUCH harder to get to,
You'll need the following tools:
++++++++++++++++++++++++++++++++++++
Soldering Iron and Solder
Jameco Electronics part # 229673 $ 59.95 each
get Solder at your local Radio Shack (if ya got one still open)
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Solder "Sucker"
Jameco electronics part # 19166 $ 4.95 each
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Small cutters and small needle-nose plyers
How do you check to see if your console or other gear has caps going bad????
Please go look at the "Bad Caps" link on the main page...