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DIY Stompboxes => Building your own stompbox => Topic started by: Steben on December 16, 2024, 02:47:34 PM

Title: Clone The Depths vibe by eqd... the lfo thing
Post by: Steben on December 16, 2024, 02:47:34 PM
Hi guys.
I got hold of a diy clone of the depths.
Not badly built given the finicky lfo issue is well present. Can someone give some background on the lfo quirckyness?

For the record: it's about the LFO shutting down at low rate at high intensity settings. Does feel like that. Or is low rate anyway? Eqd admits it is a characteristic of the circuit.
Looking at the schematic hastly I do not see the reason behind the phenomenon.
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: antonis on December 16, 2024, 04:04:54 PM
Quote from: Steben on December 16, 2024, 02:47:34 PMLooking at the schematic

Do you mind if I ask at what schematic..?? :icon_mrgreen:
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: Steben on December 17, 2024, 01:37:24 AM
https://imgur.com/8R4keTO
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: charbot on December 17, 2024, 04:15:19 AM
On mine, I had to increase R33(i think) to something like 150k and the LFO no longer locks up at extreme knob positions.
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: antonis on December 17, 2024, 07:41:47 AM
Can't see any weirdness in LFO (other than its circuitry quirky drawing)..
It's just a more "sophisticated" version of a widely used sine wave oscillator, like the one in EA tremolo..

I'd try to significantly lower R14 & R19 values..
(about 70k to GND seem to me high enough..)
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: duck_arse on December 17, 2024, 08:23:40 AM
and C12 is backwards. [on the circuit I have, cause I still can't see anything posted on imgur.]
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: antonis on December 17, 2024, 08:36:13 AM
(https://i.imgur.com/8Ht3Gir.png)

(https://i.imgur.com/KvfBOZ3.jpg)
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: duck_arse on December 17, 2024, 09:05:25 AM
thanks antonis. yes, that one, with the cap backwards.
Title: Re: Clone The Depths vibe by eqd... the lfo thing
Post by: antonis on December 17, 2024, 02:50:08 PM
Quote from: duck_arse on December 17, 2024, 09:05:25 AMyes, that one, with the cap backwards.

If you're talking about C12, I do agree.. :icon_wink: