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Re: Schematic Accuracy [message #20177 is a reply to message #20097]

Tue, 18 February 2014 13:31

bluezebra
Messages: 89
Registered: February 2014
Location: Lafayette, LA

Member

None of the 1% resistors were changed out. Just the carbon comps with carbon film. The tantalums at Q132 Q133 were changed out to electrolytics with a higher voltage value. Last night all transistors and capacitors were checked for orientation.

I took a chop stick and adjusted lead dress (although I didn't think that in an amp with such low voltages would matter) and got no results or change in tone.

I grounded the wiper of the intensity pot with no change. I ground the wiper of the speed pot and it turns the tremolo off.

I changed the large cement 1 ohm 5 watt resistors (one of them was 260 ohm) to 1 ohm wirewound 5 watt.

I also changed the ground from the power cord from the chassis to a lug of the power transformer (just experimenting). No change. I'm going to get a friend's O scope to have a look around.

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[Message index]

		Schematic Accuracy By: bluezebra on Mon, 10 February 2014 01:29
		Re: Schematic Accuracy By: stevem on Mon, 10 February 2014 06:30
		Re: Schematic Accuracy By: bluezebra on Mon, 10 February 2014 10:19
		Re: Schematic Accuracy By: bluezebra on Mon, 10 February 2014 10:26
		Re: Schematic Accuracy By: chicagobill on Mon, 10 February 2014 12:40
		Re: Schematic Accuracy By: bluezebra on Mon, 10 February 2014 13:00
		Re: Schematic Accuracy By: stevem on Mon, 10 February 2014 13:17
		Re: Schematic Accuracy By: bluezebra on Mon, 10 February 2014 13:41
		Re: Schematic Accuracy By: chicagobill on Mon, 10 February 2014 16:24
		Re: Schematic Accuracy By: bluezebra on Mon, 10 February 2014 17:10
		Re: Schematic Accuracy By: bluezebra on Mon, 10 February 2014 17:33
		Re: Schematic Accuracy By: chicagobill on Tue, 11 February 2014 12:22
		Re: Schematic Accuracy By: bluezebra on Tue, 11 February 2014 13:25
		Re: Schematic Accuracy By: stevem on Wed, 12 February 2014 09:26
		Re: Schematic Accuracy By: bluezebra on Wed, 12 February 2014 12:55
		Re: Schematic Accuracy By: stevem on Wed, 12 February 2014 17:08
		Re: Schematic Accuracy By: bluezebra on Wed, 12 February 2014 17:20
		Re: Schematic Accuracy By: bluezebra on Wed, 12 February 2014 21:22
		Re: Schematic Accuracy By: chicagobill on Thu, 13 February 2014 10:43
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 13:57
		Re: Schematic Accuracy By: chicagobill on Thu, 13 February 2014 14:40
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 15:20
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 15:25
		Re: Schematic Accuracy By: chicagobill on Thu, 13 February 2014 16:14
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 17:39
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 19:36
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 22:03
		Re: Schematic Accuracy By: bluezebra on Thu, 13 February 2014 22:40
		Re: Schematic Accuracy By: chicagobill on Fri, 14 February 2014 13:04
		Re: Schematic Accuracy By: bluezebra on Fri, 14 February 2014 22:38
		Re: Schematic Accuracy By: stevem on Sat, 15 February 2014 07:43
		Re: Schematic Accuracy By: bluezebra on Sat, 15 February 2014 10:28
		Re: Schematic Accuracy By: bluezebra on Sat, 15 February 2014 12:11
		Re: Schematic Accuracy By: stevem on Mon, 17 February 2014 06:33
		Re: Schematic Accuracy By: bluezebra on Mon, 17 February 2014 11:07
		Re: Schematic Accuracy By: bluezebra on Mon, 17 February 2014 11:33
		Re: Schematic Accuracy By: chicagobill on Mon, 17 February 2014 13:25
		Re: Schematic Accuracy By: bluezebra on Mon, 17 February 2014 14:20
		Re: Schematic Accuracy By: chicagobill on Mon, 17 February 2014 14:54
		Re: Schematic Accuracy By: bluezebra on Mon, 17 February 2014 16:56
		Re: Schematic Accuracy By: bluezebra on Mon, 17 February 2014 17:14
		Re: Schematic Accuracy By: bluezebra on Mon, 17 February 2014 17:36
		Re: Schematic Accuracy By: chicagobill on Tue, 18 February 2014 12:24
		Re: Schematic Accuracy By: bluezebra on Tue, 18 February 2014 13:31
		Re: Schematic Accuracy By: bluezebra on Tue, 18 February 2014 13:37
		Re: Schematic Accuracy By: chicagobill on Tue, 18 February 2014 13:58
		Re: Schematic Accuracy By: bluezebra on Tue, 18 February 2014 18:25
		Re: Schematic Accuracy By: bluezebra on Tue, 18 February 2014 20:53
		Re: Schematic Accuracy By: chicagobill on Tue, 18 February 2014 21:38
		Re: Schematic Accuracy By: bluezebra on Tue, 18 February 2014 23:15
		Re: Schematic Accuracy By: bluezebra on Tue, 18 February 2014 23:17
		Re: Schematic Accuracy By: chicagobill on Wed, 19 February 2014 01:44
		Re: Schematic Accuracy By: bluezebra on Wed, 19 February 2014 10:32
		Re: Schematic Accuracy By: chicagobill on Wed, 19 February 2014 11:13
		Re: Schematic Accuracy By: bluezebra on Wed, 19 February 2014 12:21
		Re: Schematic Accuracy By: chicagobill on Wed, 19 February 2014 13:20
		Re: Schematic Accuracy By: bluezebra on Wed, 19 February 2014 14:02
		Re: Schematic Accuracy By: bluezebra on Wed, 19 February 2014 14:05
		Re: Schematic Accuracy By: chicagobill on Wed, 19 February 2014 17:06
		Re: Schematic Accuracy By: bluezebra on Wed, 19 February 2014 23:21
		Re: Schematic Accuracy By: stevem on Thu, 20 February 2014 06:49
		Re: Schematic Accuracy By: bluezebra on Thu, 20 February 2014 12:03

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