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 Post subject: Re: Newbie Questions
PostPosted: Wed Feb 15, 2012 3:05 am 
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Friend
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Joined: Tue Jan 03, 2012 8:30 pm
Posts: 22
Well,

I kept going checking voltages. Afterwards I connected a line cable and got a very normal and expected HUM.

I got slightly lower voltage values on some parts than those on the layout. Is that ok??


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 Post subject: Re: Newbie Questions
PostPosted: Wed Feb 15, 2012 10:12 am 
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Experienced
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Location: Vancouver B.C. Canada
Slightly?? 8 or 10 volts on the plates is no big deal but on other parts it could be a problem.
About the hum. Did you have a guitar on the end of the cable or was it open?


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 Post subject: Re: Newbie Questions
PostPosted: Wed Feb 15, 2012 12:15 pm 
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I'll check the new voltages tonight.

What i meant about the hum: According to the manual, i should connect a normal line cable into the input. Turn the volume and touch the tip. I did and i hear the HUM i expected. What is curious is even though i had the amp at some point very loud, and I'm amazed how silent it is.

So i'll recheck the voltages tonight and plug my strat :D


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 Post subject: Re: Newbie Questions
PostPosted: Wed Feb 15, 2012 12:16 pm 
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Just a quick question. Based on the layout.

Which pins are the plates on the 6v6 and 12ax7?


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 Post subject: Re: Newbie Questions
PostPosted: Wed Feb 15, 2012 12:27 pm 
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Holy Ghost
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Location: Canada
6V6 plates on pin 3

12AX7 on pins 1 and 6

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 Post subject: Re: Newbie Questions
PostPosted: Fri Feb 17, 2012 6:10 am 
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Guys,

I've been doing voltage checks.

This is what i found out.
When i calibrate 400VDC at the first 50uF on the + part, the readings are:
400 at the Plate of the 6V6 (pin3)
180 at Pin 1 of the 12AX7
164 at pin 6 of the 12AX7

28.1 at the 750R connecting to the 6L6/6V6 Switch
332 at the + of the last 33uF Cap that joins the 47k2w Resistor and the jumper that connects to the 220k(red)Resistor.
1.844 where Pin 3 on the 12AX7 joins the 2k7R, 0.47uFCap and the 1uFCap
1.67 where pin 8 on the 12AX7 joins the 2K7 R

Is this ok?? I believe i'm pretty close except for the plates on the 12AX7


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