Drilling for Low Tide Mini (among other things)

ragamuffin

ragamuffin

Well-known member
Hey all! About six months back I ordered a PCB and all the parts to build a Low Tide Mini but haven't gotten around to building it, or even thinking about building it really as the past months have been kind of hellacious for me. But I survived and I've got the pedal building bug again! I'm going to re-heat my soldering skills on a Chopshop that I also ordered the pcb/parts for and then move on to the Low Tide Mini.

Anyhow, some questions for y'all:

-I have an un-drilled enclosure that I plan to use for my LTM build and there's no drilling template on PedalPCB site: am I fine to drill the pot/footswitch holes using the drill template from one of the other six-knob PedalPCB projects?

-Also, how do I go about setting the BBD bias trim pot? And what does the gate trim pot do?

-Any other tips for building the Low Tide Mini or for stacked board pedals in general? (I did make sure to order low-profile electrolytic caps)
 
It's a standard 6 knob.

There's been a lot of discussion of how to set the trims on these in the forum. Do some searching and you should be able to find whatever you need.

I think I just fiddled mine until I liked how they sounded, but here's someone who sounds like they know what they're talking about.

bowanderror

SOLVED Post in thread 'Low Tide - LPG not working.'

The envelope part of the LPG does indeed send a control signal to the LM13700. It's actually a control current, but I believe you should see a change in voltage if you probe after R29 (at Pin 1 & Pin 16 of the OTA). Both pins are connected, and the voltage should change as you play harder. I can't recall offhand what the voltage range is, so maybe someone else can chime in.

I know you said you played with the trimpots, but I'd go through the process below word-for-word as there is a lot of interaction between the front panel controls & the trimpots. Unfortunately, they both have quite...
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Here is the biasing for the trim and gate.
bowanderror

SOLVED Post in thread 'Low Tide - LPG not working.'

The envelope part of the LPG does indeed send a control signal to the LM13700. It's actually a control current, but I believe you should see a change in voltage if you probe after R29 (at Pin 1 & Pin 16 of the OTA). Both pins are connected, and the voltage should change as you play harder. I can't recall offhand what the voltage range is, so maybe someone else can chime in.

I know you said you played with the trimpots, but I'd go through the process below word-for-word as there is a lot of interaction between the front panel controls & the trimpots. Unfortunately, they both have quite...
  • Like
 
Great minds!
Erik S said:
It's a standard 6 knob.

There's been a lot of discussion of how to set the trims on these in the forum. Do some searching and you should be able to find whatever you need.

I think I just fiddled mine until I liked how they sounded, but here's someone who sounds like they know what they're talking about.

bowanderror

SOLVED Post in thread 'Low Tide - LPG not working.'

The envelope part of the LPG does indeed send a control signal to the LM13700. It's actually a control current, but I believe you should see a change in voltage if you probe after R29 (at Pin 1 & Pin 16 of the OTA). Both pins are connected, and the voltage should change as you play harder. I can't recall offhand what the voltage range is, so maybe someone else can chime in.

I know you said you played with the trimpots, but I'd go through the process below word-for-word as there is a lot of interaction between the front panel controls & the trimpots. Unfortunately, they both have quite...
  • Like
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