Author Topic: Greenbean - question on Volume  (Read 369 times)

Vivek_rc

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Greenbean - question on Volume
« on: April 13, 2020, 03:17:57 AM »
Hi All,

I just completed a greenbean 2019 build and was testing it, and it seems to working and getting an overdrive sound. However the volume seems to be on the low side, itís not much louder even setting volume pot at max, the controls work and drive pot does overdrive the signal, clipping also changes the sound. Iíve measured all the voltages and everything checks out. Was hoping to get some advice if anyone has faced a similar situation.

Many thanks

Vivek




Vivek_rc

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Greenbean - question on Volume
« Reply #1 on: April 13, 2020, 05:00:35 AM »
I think I might have found an issue :) for some reason  I put in the wrong capacitors for the 1uf!! Realised when I looked at the pictures I posted on this forum! Will replace them and see if there is a difference

Update: replaced the capacitors with 1uf caps and itís still the same, volume is still at the same level.
« Last Edit: April 13, 2020, 05:29:46 AM by Vivek_rc »

jimilee

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Re: Greenbean - question on Volume
« Reply #2 on: April 13, 2020, 07:44:08 AM »
Check all your other parts and reflowed yet?


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alanp

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Re: Greenbean - question on Volume
« Reply #3 on: April 13, 2020, 10:50:07 AM »
Did you use a substitute for Q1 and the bottom right one? I notice that the transistors there are oriented the opposite way to the silkscreen.
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Vivek_rc

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Re: Greenbean - question on Volume
« Reply #4 on: April 13, 2020, 02:24:16 PM »
Did you use a substitute for Q1 and the bottom right one? I notice that the transistors there are oriented the opposite way to the silkscreen.
Hi Alanp, I used BC550s and from the data sheet they should be orientated so that pin 3 is the emitter. I will try to reflow all solder points again and see if it makes a difference 


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Vivek_rc

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Re: Greenbean - question on Volume
« Reply #5 on: April 13, 2020, 02:25:02 PM »
Check all your other parts and reflowed yet?


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Will try to do a reflow


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Vivek_rc

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Greenbean - question on Volume
« Reply #6 on: April 13, 2020, 05:55:04 PM »
Reflowed the solder points again and now the volumes come up, it sounds good. Had to go over once and then again on the clipping switch.

Than you Alanp for the advice and guidance


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gordo

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Re: Greenbean - question on Volume
« Reply #7 on: April 13, 2020, 06:00:36 PM »
Excellent!

jimilee

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Re: Greenbean - question on Volume
« Reply #8 on: April 13, 2020, 08:11:13 PM »
Reflowed the solder points again and now the volumes come up, it sounds good. Had to go over once and then again on the clipping switch.

Than you Alanp for the advice and guidance


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Great to hear. I had to do that last week with a couple of builds. I get over confident in my soldering from time to time.


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Vivek_rc

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Re: Greenbean - question on Volume
« Reply #9 on: April 13, 2020, 08:34:55 PM »
Thanks Jimilee, I know what you mean about being over confident, it looked all fine via a visual inspection but you never know whatís going on under the solder...thanks for the advice Mate. Now to box it.


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