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http://a68.tinypic.com/nl2b7t.jpg
Cot50 on tagboard!... won’t hijack the thread further!!!!
http://a64.tinypic.com/jsd2xv.jpg
http://a66.tinypic.com/10wiqkw.jpg
Beautiful.
http://3.bp.blogspot.com/-imI0JcQ_gSI/VAmT8yw-f3I/AAAAAAAAImM/MqxVruF6nCo/s1600/Paul+Cochrane+Timmy+Rev+2.png
Questions for the experts:
I can't see the schematic above but if there's a 100R is series with V+ then there's probably a Cap to ground after that which is a basic low pass filter to get rid of ripple from the power supply
With resistors there's a series, the lower tolerance series have fewer values as there's more overlap of values due to the lower tolerance ... as the tolerance moves tighter to say 1% there's no overlap really so more values in the range. People tend to design with common values they use a lot ... I tend to use 10K a hell of a lot purely because buying one value in bulk is very cheap and with a value of 10 the maths is very easy
http://www.logwell.com/tech/components/resistor_values.html
I've soldered what I can onto the board. Now I'm waiting for the Tayda delivery which, I hope, should have a couple of small factor 1uF caps - smaller than the monster-sized ones I used on the breadboard!
https://www.taydaelectronics.com/capacitors/polyester-film-box-type-capacitors/1uf-100v-5-polyester-film-box-type-capacitor.html
Some things I've learnt so far about this:
There are many substitutions of components but none of them will make much of a difference except in the range where things happen pot wise
Tomorrow I will hook it up to my Hot Rod and have a tinker. What I'm after is something that compliments that particular amp well. Once I'm happy with the circuit I'll get a painted box and do a proper job of it
Box - Ebay - China £3
Veroboard - Eaby £1
Jacks - CPC 90p for 2
Pots - CPC - £2.40 for 4
DC in - Ebay £1
DPDT footswitch - Ebay £2
Veroboard Ebay £1
opamp - CPC 43p
LED - CPC 9p
Resistors - Ebay 20p
Caps - Ebay £1
So less than £15 for a truly great sounding OD, I'm pretty pleased with that but I like it so much I'm gonna build another one with a painted box, graphics, high quality footswitch and a secret weapon
I'm still waiting on my parts from Tayda for the enclosure, pots, jacks, knobs and a couple of capacitors (1uF). I'm starting to get itchy to get this Timmy into a box so I can start on another one.
Are you using the 1uf to block the DC on the output (last cap on the right of the schemetic) any value between 470n and 10uf be fine, doesn't need to be bipolar as there's a DC bias to the left of it