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- From: rmf@bpdsun1.uucp (Rob Finley)
- Newsgroups: rec.video
- Subject: Re: Sony Trinitron, Sony HF595 VCR, 60 Cycle Hum
- Message-ID: <1993Jan27.020547.17710@bpdsun1.uucp>
- Date: 27 Jan 93 02:05:47 GMT
- References: <1k14ckINNsci@controversy.math.lsa.umich.edu>
- Organization: Harris Allied Broadcast Div., Quincy, IL
- Lines: 29
-
-
- A possible method for curing hum problems is to make
- sure that your entire system is plugged into the same
- outlet strip.
- Sometimes that can be the simplest solution. Get one
- of those surge protector strips while you are at it.
- In one case, it meant that I had to put the amp
- on an extension cord. On the other hand, the AC extension
- was cheaper than speaker cables. B-)
-
-
- Hum is caused by AC leaking into the shields of your
- cables and can be minimized by forcing the
- path to take the correct route (ac cord) rather than
- through your cables.
-
- It is sometimes hard amongst different manufacturers
- but if you are making your own cables, make sure that the
- shield is only connected on one side of the cable. If you
- connect ground on both ends, it allows current to pass along
- the cable. The shield should bring AC noise back to the source.
-
- Keeping a ground reference between the two components is
- rarely important as the AlternatingCurrent Audio signal
- usually goes through a DC-blocking capacitor on the inputs
- of the peripheral.
-
-
- Robert
-