Amptweaker - Tight Metal

bajaman · Post by **bajaman** » 30 May 2013, 11:37

tight metal -3a.sch: (117.06 KiB) Downloaded 195 times

my preliminary amended Eagle schematic - tone control, notch filter and power supply corrected

apollomusicservice · Post by **apollomusicservice** » 30 May 2013, 11:56

Bajaman can you upload your schematic as pdf?

bajaman · Post by **bajaman** » 30 May 2013, 12:06

Post by **The G** » 30 May 2013, 13:17

Bajaman, C1-R1-R3 should connect to GND.
Now the schematic look really interesting. Given some spare time I'll breadboard it.

jymaze · Post by **jymaze** » 30 May 2013, 13:32

Thanks you all for putting the schematic from my crappy handwritten drafts in a software. I just hate doing it for some reason. But I can trace all day long! That is the fun part for me.

Post by **azrael** » 30 May 2013, 16:55

J0K3RX wrote:What, nobody made a single layer through hole yet? Is it because it doesn't have Wampler tattooed on it?

Don't make me do it! We will be debugging till the cows come home...

Was just waiting until the correction were released.

I'll finish it after work today. Just a bit hard to make out what's going on with the power network, I usually prefer to use Net labels or Voltage reference symbols for that sort of thing, so it was a bit harder for me to decipher it.

jymaze · Post by **jymaze** » 30 May 2013, 17:21

Azrael,

Here is the PSU in an easier to decipher format.

I already posted that before, but actually I forgot the 4007 in series with a 47 ohms resistor. There are 2 4007 diodes in the PSU... Good polarity protection!

PSU.pdf: (15.94 KiB) Downloaded 153 times

apollomusicservice · Post by **apollomusicservice** » 30 May 2013, 18:32

This is a new version with implemented corrections. Points 1-5 are connected to ground, IN-input, OUT-output, IN1 and OUT1 to insert out, the T1 Tight pot, G1 and G2 to gain pot, G3 and G4 to gain pot other sections (both at Gate SW also), TO1 TO2 TO3 on Tone pot, TH on Thrash sw, V1 V2 V3 the Volume pot and
+9 V power supply.

bajaman · Post by **bajaman** » 30 May 2013, 20:07

grounds connected and extra diode in power supply

bajaman · Post by **bajaman** » 30 May 2013, 22:09

: Tight Metal 0.9 (needs verifying) small.BMP (1.72 MiB) Viewed 1000 times

My new rendition in Sprint Layout V6.0 - needs verifying - some of the tracks are on different layers - not sure what the DC socket is so pin footprints may be wrong - please advise if you see ay obvious mistakes

I will post complete files including gerber files etc. once layout is deemed to be correct - I will probably adjust the dc socket footprint for a 2.1 mm standard DC socket in the final draft.
here is a composite of V0.9
cheers
bajaman

J0K3RX · Post by **J0K3RX** » 30 May 2013, 22:47

Just got home from work... nice progress!!!

J0K3RX · Post by **J0K3RX** » 31 May 2013, 01:42

azrael wrote:
J0K3RX wrote:What, nobody made a single layer through hole yet? Is it because it doesn't have Wampler tattooed on it?

Don't make me do it! We will be debugging till the cows come home...
Was just waiting until the correction were released.
I'll finish it after work today. Just a bit hard to make out what's going on with the power network, I usually prefer to use Net labels or Voltage reference symbols for that sort of thing, so it was a bit harder for me to decipher it.

Damn! Can't wait!!

bajaman · Post by **bajaman** » 31 May 2013, 03:17

: Amptweaker - Tight Metal V5

still more corrections 15k changed to 1k5

euronymous0001 · Post by **euronymous0001** » 31 May 2013, 05:32

im not accustomed to the way bajaman drew the PSU.

so here is one for those who are like me

J0K3RX · Post by **J0K3RX** » 31 May 2013, 06:15

If somebody creates a through hole layout I can etch and build this weekend and do a side by side comparison...

bajaman · Post by **bajaman** » 31 May 2013, 07:06

Can you do double sided etching okay Jim

and you may not like my latest schematic euronymous0001 but at least it is correct - your one has at least two errors in the layout and component values

( and it is almost too small to read

) hint 15k resistor should be 1k5 and the second filter to ground in the notch section is connected wrong

bajaman

bajaman · Post by **bajaman** » 31 May 2013, 07:09

AND the 68k resistor supplying the bias line should be 6k8

bajaman · Post by **bajaman** » 31 May 2013, 07:10

AND the VR supply rail resistors are 18k and 47k NOT 100k and 150k

bajaman · Post by **bajaman** » 31 May 2013, 07:11

AND the resistor in series with D2 should be 47 ohm NOT 68k

bajaman · Post by **bajaman** » 31 May 2013, 07:13

AND C14 should be 22n NOT 220n - for fuck's sake use your eyes

Amptweaker - Tight Metal [traced]