Neovibe clone with lamp/photocell tremolo in one chassis?

[Leepyringa]

Hi, everyone!

I'm looking to build neovibe clone with lamp/photocell tremolo in one stompbox! I've happened to play through Sears Silvertone 1484 Twin Twelve amp and totally loved it's built-in tremolo. And it has photocell tremolo. See the schematic here http://silvertoneworld.net/amplifiers/1484/1484.html

To be honest I'm new to pedal-making and I'm wondering if it's possible to make my idea come true with one power supply (neovibe uses 18v) and one lamp for both effects.

So is it possible? Or I need higher voltage to reproduce sounds of silvertone tremolo?  Or if there any other ideas for photocell tremolo?

Any help appreciated!

Ivan

[R.G.]

The earlier variant of the Univibe, the RT-18, had a tremolo as part of the same circuit.

[smallbearelec]

I'm new to pedal-making and I'm wondering if it's possible to make my idea come true with one power supply (neovibe uses 18v) and one lamp for both effects.

It can be done, but designing it is Not a beginner-type project. If there is a DIY build available of the RT-18 that R. G. mentions, that would be worth looking at. I expect the quality of the trem would be different, if only because the 'vibe uses an incandescent lamp to excite the LDR and the Silvertone used a neon lamp like Fender and others. I've also heard tell that the tube modulator gives a warmer tone than ICs or transistors, but I can't tell you how much of this is hype.

My call: If you want a modulation effect that's a good learning project, try something like the EA tremolo. Then tackle the Neovibe.

[PRR]

The Silvertone uses a 350 Volt (and 6.3V) power supply, a tube, and a now-odd neon photo-bug.

Emulating that wacky waveform with modern 18V parts will be a LOT of work.

> I'm new to pedal-making

Even the NeoVibe is a heavy build.

Build "something like the EA tremolo" first.

[Leepyringa]

Ok thank you guys!

I'm not that 'new' actually, but I've never build something too hard...I did make some overdrive and fuzz pedals along with doing some modifications to various boss stompboxes.

So I think I'm ready for neovibe!

I looked at resly rt18 and it's pretty interesting ! Though I wanna make my own version of it...

I came to an idea of simply put LDR on the way from input to output in tremolo mode. I think it will work (with LDR of proper value) and what do you think, guys?

In silvertone 1484 tremolo shorts input signal to ground but I think that's not necessary...

smallbearelec, I don't think that light source makes a lot of difference...There is a hype between tube and transistor circuits, I believe, but more obvious to me is a hype between IC based circuits and LDR/LED based circuits...so I'm sticking with the second one

Thank you all again!