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Topics - jjj333

#1
Hi you wonderful DIY experts,
For years I'm trying to build a small, compact Demo unit for my creative whistling to music. I hate to have ten different boxes to connect etc. I bought one of these cheap Chinese (Biyang) "Tri Reverb", which sounds great, but is too big! 
The reason why I bought this Rev (Brick2H, long) was to build a small as possible Rev unit to fit into a Mini stereo speaker box (of only 16x8x8cm) for a compact Demo unit to demonstrate my whistling to music. The Mini Stereo for music (only) has got a warm bass and so, the Brick reverb is a separate unit, consisting of the electret Mic with a TA2024 Amp and a remotely placed speaker.

I already built the "Dub A Rub", but its Rev effect was too short and I wonder how I could minimize the circuit's size w/o sacrificing its Rev quality? Maybe I there's a way of adding feedback to lengthen the Rev effect? - I could reduce its physical size by soldering its components directly onto each other without a PCB.
I found an interesting circuit and need only Mono reverb, but I prefer a long reverberation, like from that China Biyang.
I would like to input an electret Mic and for that purpose configured the input OP Amp input. Will that work?
To get Mono reverb, I joint the Brick outputs (pin 5 & 6) via 5K resistors. 
I only have hobby electronics practice and so, at least I can build it as shown in  the circuit diagram.
To give you an idea of what I do, here's a Demo of my creative whistling to music:   https://app.box.com/s/6f72eb90c2002db2e9fc  or this one: https://www.mediafire.com/?t0mocnkevh9bz1c

Warm Regards, from young pensioner (74) down-under in St'go de Chile

PS. I found the circuit here:  https://www.youtube.com/watch?v=edNSO0RBLms