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Messages - Vivek_rc

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31
General Questions / Re: Greenbean - question on Volume
« 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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32
General Questions / Re: Greenbean - question on Volume
« 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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33
General Questions / Greenbean - question on Volume
« 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.

34
General Questions / 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




35
General Questions / Re: Rump Roast Query
« on: March 26, 2020, 04:05:21 AM »
Adding Photo of the build, thanks again

36
General Questions / Rump Roast Query
« on: March 26, 2020, 03:33:32 AM »
Hi All
Iíve just completed a Rump Roast Build (bought in around 2010  but forgot/misplaced it and then it appeared again a month ago in a toolbox!). I do get an output, a misted boost and tone control works, Iíve built it as a hybrid, switchable between a boost and overdrive. I am not getting a significant boost, itís On a similar level as the clean signal. Also when I bias to 4.5 V I get no sound, Iíve played with both trimmers and when I set Q1:1.3V and Q2:1.5V I then get an output. Any help and guidance would be greatly
appreciated, thank you -

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