Spencerleehorton
Well-known member
Hi guys,
Been a while since I’ve built something and had a couple of pcbs I got off eBay from ages ago.
They are blue pcbs and marked BA189 and BA283am.
I’ve populated both pcbs and my first question is about the two gain stages.
I’m only using gain stage 1 so far and I’m a bit confused with the labelling of the connections as the guy who made these pcbs has changed all the labels and I’m working from either the ez1290 docs or the original 1073 schematic.
Gain stage 2 looks like it should be used for the eq of the 1073 but can I use it for the preamp?
Also I get a drop in level when at position 8 of the pot?
I’ve checked the resistors everything seems fine?
Is there a chart for what ohms I should have on the switched gain pot?
Been a while since I’ve built something and had a couple of pcbs I got off eBay from ages ago.
They are blue pcbs and marked BA189 and BA283am.
I’ve populated both pcbs and my first question is about the two gain stages.
I’m only using gain stage 1 so far and I’m a bit confused with the labelling of the connections as the guy who made these pcbs has changed all the labels and I’m working from either the ez1290 docs or the original 1073 schematic.
Gain stage 2 looks like it should be used for the eq of the 1073 but can I use it for the preamp?
Also I get a drop in level when at position 8 of the pot?
I’ve checked the resistors everything seems fine?
Is there a chart for what ohms I should have on the switched gain pot?