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previous: Gil Ayan Dominik, here are some points that ... -- 5/3/2000 4:12 PM

Re: Am I to dumb(le) to understand this??

5/4/2000 12:54 PM
Dominik	Re: Am I to dumb(le) to understand this?? Gil wrote: >1. (moot) Why are you using three relays??? Dumble >himslef used one in older amps, and two in newer >ones -- the second relay is used for the preamp >boost function. I have two seperate channels each with clean and overdrive (that makes two relays) and one relay for switching between the seperate channels. ONe channel is modeled after the 70s OD (Deep Switch Rock/Jazz) the other after the skyline type (tone stack after OD). I used 100 Ohm resistors on the LEDs. Still I have a going down of voltage when the relays are engaged. I put 47 uF electrolytics across the - and + poles of the relays to keep clikcing down (or to eliminate, since it is completely gone now).The relays can take 5 - 11 V as per spec.I used the MKiii type setup, but installed four 1N4007 instead of the 25A bridge rectifier. The 6.3 V AC winding gives 2.7 A if nessecary, but I doubt that the relays and LEDS draw that much. I don´t know how much current the relays draw, since the specs don´t tell me.THe LEds draw 10 mA each I guess (If= 10 mA). Oddly enoug, when using (as said before) a 9 V DC source (for protable CD player) the switching is ok, but the relays get a bit hot. Thanks for the input so far, I hope I will have this sorted out, since it is a bit depressing to have an amp running and sounding fine, but not being able to fix that damn channel switching thinggy. Best Regards, Tinkerer Dominik

5/4/2000 12:54 PM

Dominik

Re: Am I to dumb(le) to understand this??

Gil wrote:
>1. (moot) Why are you using three relays??? Dumble >himslef used one in older amps, and two in newer >ones -- the second relay is used for the preamp >boost function.

I have two seperate channels each with clean and overdrive (that makes two relays) and one relay for switching between the seperate channels. ONe channel is modeled after the 70s OD (Deep Switch Rock/Jazz) the other after the skyline type (tone stack after OD).

I used 100 Ohm resistors on the LEDs. Still I have a going down of voltage when the relays are engaged. I put 47 uF electrolytics across the - and + poles of the relays to keep clikcing down (or to eliminate, since it is completely gone now).The relays can take 5 - 11 V as per spec.I used the MKiii type setup, but installed four 1N4007 instead of the 25A bridge rectifier. The 6.3 V AC winding gives 2.7 A if nessecary, but I doubt that the relays and LEDS draw that much. I don´t know how much current the relays draw, since the specs don´t tell me.THe LEds draw 10 mA each I guess (If= 10 mA). Oddly enoug, when using (as said before) a 9 V DC source (for protable CD player) the switching is ok, but the relays get a bit hot. Thanks for the input so far, I hope I will have this sorted out, since it is a bit depressing to have an amp running and sounding fine, but not being able to fix that damn channel switching thinggy.

Best Regards,
Tinkerer Dominik

Replies:

Dave H. Are you using 180 ohm balancing res... -- 5/4/2000 2:07 PM