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Title: Crappy audio traced to crappy DVD player of all things Post by: w1vtp on December 04, 2008, 01:04:43 PM Checked into a local 75M QSO this morning just before going to work and got a crappy audio report -- humm and dist... audio.
On a hunch, I unplugged a Phillips DVD player ($29.99 special) I have had other probs.. with and the problem went away. Steve QIX made a comment about an incompatibility issue with some foreign mfg stuff. Anyway -- how's that for an interesting problem / solution? Al Title: Re: Crappy audio traced to crappy DVD player of all things Post by: Steve - WB3HUZ on December 04, 2008, 04:26:37 PM Oh, so you were the guy playing music with hum on it on 75 meters? :P
Title: Re: Crappy audio traced to crappy DVD player of all things Post by: W2JBL on December 11, 2008, 12:28:17 AM i had similar problems here at a recently established station in Brewster NY. i traced the problem to a Memorex VCR/DVD machine plugged into the same power strip as my audio processing junk. seems the switching power supply in the DVD machine was spraying all sorts of noise back into the line and my audio gear did not like it. best way to play music on boatanchors is from a turntable playing vynl records to a tube phono preamp...
Title: Re: Crappy audio traced to crappy DVD player of all things Post by: steve_qix on December 11, 2008, 06:11:55 AM Ok, I'll bite ;)
I'm not sure I understand what, or how, whatever happened - happened. Was this thing in any way hooked up to the transmitter and/or audio system? Perhaps there was an odd-ball ground loop or something like that. What are the particulars? How was everything connected? Regards, Steve Title: Re: Crappy audio traced to crappy DVD player of all things Post by: VO1GXG on December 11, 2008, 02:50:28 PM Had a problem with a LCD TV powersupply. Took the psu from the tv and wrapped it in lead tape, solved that problem
Title: Re: Crappy audio traced to crappy DVD player of all things Post by: flintstone mop on December 11, 2008, 04:14:53 PM I hope the PSU doesn't overheat from the tape job......
Fred Title: Re: Crappy audio traced to crappy DVD player of all things Post by: W1RKW on December 12, 2008, 05:22:08 PM I had my audio system interconnected to my computer to play internet music. The DSL modem put a lot of crap into the audio system not to mention polluted the air in my living space. Putting its switching power supply into a grounded box eliminated the problem.
Title: Re: Crappy audio traced to crappy DVD player of all things Post by: w1vtp on December 14, 2008, 08:06:30 PM Oh, so you were the guy playing music with hum on it on 75 meters? :P NOTitle: Re: Crappy audio traced to crappy DVD player of all things Post by: w1vtp on December 14, 2008, 08:13:38 PM Ok, I'll bite ;) I'm not sure I understand what, or how, whatever happened - happened. Was this thing in any way hooked up to the transmitter and/or audio system? Perhaps there was an odd-ball ground loop or something like that. What are the particulars? How was everything connected? Regards, Steve Beats the heck out of me Steve. First time I noticed a problem with this unit was a motor sounding like noise on not only 75 but on the AM broadcast band. I found the problem by going around the house with an AM broadcast RX and used the loop ant in it to triangulate on the problem. The second time I noticed a problem was a hum on my monitor / receiver system while transmitting although no one else heard it (unplugging the DVD player cured the problem in every case). The final problem was that gawd-awful sound imposed on my audio chain. In every case the unit was turned off, just plugged in. AGAIN, unplugging it removes all of these problems. Go figger. Al |