pucho812

Re: dbx 162 schematic needed
« Reply #20 on: May 08, 2018, 02:16:54 PM »
output card traces
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


pucho812

Re: dbx 162 schematic needed
« Reply #21 on: May 08, 2018, 02:17:35 PM »
duel detector card
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

pucho812

Re: dbx 162 schematic needed
« Reply #22 on: May 08, 2018, 02:18:33 PM »
duel detector card traces
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

pucho812

Re: dbx 162 schematic needed
« Reply #23 on: May 08, 2018, 02:19:17 PM »
the VCA, I think, one per channel so must be.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

pucho812

Re: dbx 162 schematic needed
« Reply #24 on: May 08, 2018, 02:19:49 PM »
VCA part 2
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

analogguru

Re: dbx 162 schematic needed
« Reply #25 on: May 08, 2018, 04:13:22 PM »
So I see, one of those superclever "we-dont-have-a-clue-what-we-are-doing-therefore-we-recap-everything-in-the hope-that-the-problem-will-be-cured"-technicians was at work.

Let's have a look what else we can find out with these pictures...


pucho812

Re: dbx 162 schematic needed
« Reply #26 on: May 08, 2018, 04:43:38 PM »
So I see, one of those superclever "we-dont-have-a-clue-what-we-are-doing-therefore-we-recap-everything-in-the hope-that-the-problem-will-be-cured"-technicians was at work.

Let's have a look what else we can find out with these pictures...

L No there were faulty caps on the card.  Way over 20 year old electrolytics that were due.   I tested them with a cap tester and confirmed.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

analogguru

Re: dbx 162 schematic needed
« Reply #27 on: May 08, 2018, 05:22:54 PM »
L No there were faulty caps on the card.  Way over 20 year old electrolytics that were due.   I tested them with a cap tester and confirmed.
And who mixed up the transistors ?
Quote
So far model 230 which has 2 X  bc341 transistors on it.
As you can see on the traced schematic attached, there should be 1x BC341 and 1x BC361.

Fill in the missing component values and you have got your desired schematic - enjoy it.
« Last Edit: May 08, 2018, 05:52:18 PM by analogguru »

pucho812

Re: dbx 162 schematic needed
« Reply #28 on: May 08, 2018, 05:48:12 PM »
I don't know who mixed the transistors they were like that when I got it...

Finally sorted. Yes the transistors were all wrong. you sir were correct there is a bc341 and bc361 per each output card.  I owe you a beer or drink of choice. A trip to the local electronics store for NTE 128 and NE129 part numbers and back in business. I can now get a +20dBU output with a 0dBU input level, no compression and the output cranked to full.
« Last Edit: May 11, 2018, 04:23:33 PM by pucho812 »
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

Re: dbx 162 schematic needed
« Reply #29 on: July 24, 2019, 09:53:31 PM »
pucho812, I know this post is a little old. But I was wondering if you could help me with one of these dbx 162 daughter cards. I cant make out all the transistor markings. It looks like Q5, Q3 are BC263's.  Q2 k30A.  Q4, Q6 I cant tell (underneath the white heat sink). any help would be great. Arthur 


 

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