Ampeg - Sub Blaster

lietuvis · Post by **lietuvis** » 13 Nov 2009, 23:32

[quote="himister"]Hey fellas, would anyone bother to check this one...I'm kind of tired of drawing today so do it please

After checking need to mark components and export in pdf for transfer..
Cheers

thats to my eyes.realy cool software,what is it?

himister · Post by **himister** » 13 Nov 2009, 23:45

Thanks Aldas. That's what I call checking. Sorry for delay but I was busy doing some other stuff.
I'm making changes right now.

chicago_mike · Post by **chicago_mike** » 14 Nov 2009, 00:16

Ill order you a pizza..what toppings you like?

himister · Post by **himister** » 14 Nov 2009, 00:28

I like ketchup, mushrooms, cheese and ham...sometimes tuna fish and sweet corn....cheers for this one Mikey.

One more check of values...those resistor with 5 stripes are bugging me....in photo which is yellow marked it says they are 3k
I see there only browns and blacks so it could be only 110R or 1k flipped....damn

I hate 5 colors resistors...
Check this one until I finnish the rest and ready for export.

Thanks for the patience fellas..

chicago_mike · Post by **chicago_mike** » 14 Nov 2009, 00:31

I just got 2500 resistors off ebay..all ore the 5 striped type..thank gawd they come in little baggies.

Uhh....you like some wierd shit on your pizza!

himister · Post by **himister** » 14 Nov 2009, 01:45

Here you go. Some of the values are not marked and some aren't confirmed.
I hope you guys will update components info here so I could compile a final pdf as a whole project.
Cheers to all.

Ampeg_Sub_Blaster_PCBLAYv1.0nvc.pdf: Non verified components ver.; (77.53 KiB) Downloaded 375 times

chicago_mike · Post by **chicago_mike** » 14 Nov 2009, 02:02

The diodes arent 1N914's or 4148's are they? the 2 missing values I mean...

himister · Post by **himister** » 14 Nov 2009, 02:05

I'm not sure...schematic says they are 1N914 and zeners on the input are unknown.

chicago_mike · Post by **chicago_mike** » 14 Nov 2009, 02:22

well...would logic dictate these be 7 volt or under? Or..are zeners used for more than voltage control in something like this? Forgive my newbie question..

Post by **audioguy** » 14 Nov 2009, 02:46

Filling in the missing numbers on your layout:
The resistor between the 470Uf and the TL062 is 22k (red, red, orange, gold)
The cap under P2 looks like a .1uf One side has 104, but it could be 184 (making it a .18) printed on it, the other has 439, so I would start with the .1uf
C16 is the same as above- probably a .1uf
working on the diodes now... so far all I can see is a 6A

GOT IT... 1n746a

What else are we missing???

himister · Post by **himister** » 14 Nov 2009, 03:02

There's unknown cap of 100? just below the CD4013 and could you confirm the big grey 1N4XXX diode and the fet beside left pot on layout? Also the pot values aren't confirmed

EDIT: Sorry...and the resistor just below U3 JRC062.

Post by **audioguy** » 14 Nov 2009, 03:19

The fet under the pot (Q2) is a J175
The resistor is 150k (brown green yellow gold)
the 100? is 100uf
Diode 7 is a 1n4002
as for the pots... I cant tell what they are. They say 70-103-47 on the back and thats it.

himister · Post by **himister** » 14 Nov 2009, 03:37

The pots resistance could be measured with DMM but we wouldn't know what type they are so...
I guess that should be it.

Layout files:

himister · Post by **himister** » 14 Nov 2009, 03:47

Anyone willing to nicely redraw schematic so I could compile the whole project as one pdf file.?
The switch wiring would be nice too.

So Mikey where's that freakin' pizza...somehow tomato soup in 5 in the morning doesn't look as enough...after all this work.

Post by **audioguy** » 14 Nov 2009, 04:01

the pot labeled DIRECT reads at 7.9k
the other measures 9.8k

himister · Post by **himister** » 14 Nov 2009, 04:04

I guess you didn't desolder them before measurement.

Joke.

We can only assume that they are about 10k but since they are connected to the board this values may vary much more.

chicago_mike · Post by **chicago_mike** » 14 Nov 2009, 04:17

Ill check with Domino's...

Post by **audioguy** » 14 Nov 2009, 04:20

himister wrote:I guess you didn't desolder them before measurement. Joke.
We can only assume that they are about 10k but since they are connected to the board this values may vary much more.

Exactly

himister · Post by **himister** » 14 Nov 2009, 12:48

So fellas any other ideas how we could determine the pot values?

Post by **audioguy** » 14 Nov 2009, 14:34

I'll remove them and get the values later today when I warm up the soldering iron

Ampeg - Sub Blaster [schematic]