Boost pedals- Anyone measure the DB increase?

[audioguy]

The boost pedals that many of us are begining with are all great pedals. Im wondering if anyone has actually measured the amount of DB increase to the signal for some of these.
So far I've built the LPB at Tonelab, and it sounds great, it does exactly what I wanted it to. Now I think Im going to build tha AMZ Boost... just for fun.
Thanks!

Audioguy

[puretube]

iirc, the original E-H LPB2 amplifies exactly 10x, with pot @ max.

[Gilles C]

A little reminder about DBs and voltage (or power) gain.

http://arts.ucsc.edu/EMS/Music/tech_background/TE-06/teces_06.html

http://www.prorec.com/prorec/articles.nsf/articles/3F50D03B51D16EF386256904007DFFC0

I always measure the voltage gain of what I build.

But I kind of have to think a bit more to get the gain in DBs. That's why I added the reminder...

Now, if I could remember where I put my notes about the circuits I built.  :evil:

[Ben N]

Seems to me that the actual increase in dbs depends on other factors in addition to the voltage gain of the booster, incl mainly the headroom of whatever follows.  So calculating dbs based on the gain of the booster may be misleading in practice.

Ben

[audioguy]

I understand all of that and after re-reading my post, I can see that my wording was a little goofy. What I was asking is if any one had measured the increase of gain, not so much DB.

Thanks for everyones input!

Audioguy

[davebungo]

dB gain = 20log(Vout/Vin) so if you can measure the input and output on a scope or if you can work out in theory what the gain should be then you have the answer.  I think the AMZ Mosfet Boost has 30+dB of gain at max setting, but bear in mind this isn't necessarily a mark of any kind of sound quality.  There's more to it than that.