Maestro - FRB-1 Full Range Boost

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Maestro - FRB-1 Full Range Boost

Postby RLBJR65 » 30 Aug 2007, 00:46

Sometimes I troll Ebay for odd old stuff. Never seen this one before.

http://cgi.ebay.com/Maestro-FRB-1-Full- ... dZViewItem
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Last edited by modman on 27 Jul 2012, 16:47, edited 3 times in total.
Reason: uploaded a picture - orignal link dead
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Postby soulsonic » 30 Aug 2007, 01:03

That thing looks really cool - and the apparent scarceness and value of the original makes it a perfect candidate for DIY copying. I would really like to see a schematic for it.
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Postby The Rotagilla » 30 Aug 2007, 02:04

soulsonic wrote:I would really like to see a schematic for it.

I'm on it. Might need a few days.
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Postby analogguru » 30 Aug 2007, 08:46

So you are looking for this ?

Maestro Full Range Booster (FRB-1) schematic

18V without additional electronics and for this reason less power consumption.

Hey, that´s something for bajaman....:
Frequency selective distortion from the 70´s..... another time - back to the future: Maybe the first Klon-Clone... :roll:
Attention: Maestro - B*hringer of the 70´s - is trying to harm Bill Finnegans income :!: :wink:

enjoy,
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Last edited by analogguru on 30 Aug 2007, 09:04, edited 2 times in total.
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Postby soulsonic » 30 Aug 2007, 09:01

Danke!

I noticed the two battery snaps in the picture. Hmm... I'll have to try this one out. I've got some 2N5088 and 741 gathering dust.....
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Postby soulsonic » 30 Aug 2007, 09:03

Huh? "Power Boost" is all four filters on at once... that's funny!
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Postby bajaman » 30 Aug 2007, 12:33

an early KLON :lol: :lol: :lol:
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Postby RLBJR65 » 30 Aug 2007, 13:04

Thanks, AG!

Did you have that posted somewhere else at one time? I could have sworn that I had seen a schem for it before but couldn't find any references.

Replacing R20, R22, R24 and R26 with pots would make the frequencies adjustable?
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Postby markm » 30 Aug 2007, 22:42

bajaman wrote:an early KLON :lol: :lol: :lol:
bajaman


:lol:
Join together with the "Banned"!
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Postby The Rotagilla » 30 Aug 2007, 23:27

I attempted to make my first contribution but Analogguru beat me to it. I did compare the Analogguru schematic to the factory one and they match 100%. Should anyone want the factory schematic shoot me a PM.
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Postby bajaman » 31 Aug 2007, 00:16

you gotta be quick to beat AG :lol: :wink:
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Postby The Rotagilla » 31 Aug 2007, 00:28

bajaman wrote:you gotta be quick to beat AG :lol: :wink:
bajaman

The intent was there. Do I get credit for that? :lol:
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Postby bajaman » 31 Aug 2007, 00:29

close - but no cigar :lol:
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Postby The Rotagilla » 31 Aug 2007, 00:40

bajaman wrote:close - but no cigar :lol:

Damn! Always a bridesmaid, never a bride. [smilie=a_cry.gif]
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Re: Maestro - Full Range Boost ( FRB-1 )

Postby analogguru » 01 Mar 2008, 09:21

guts:

http://cgi.ebay.com/Vintage-1972-Maestr ... 0028000109

Note the bottom-plate with the wrong schematic of an octave-box.

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Re: Maestro - Full Range Boost ( FRB-1 )

Postby frank.clarke » 01 Mar 2008, 20:49

You could have opamp clipper for each frequency without a lot of extra trouble, that would be a step up from a Klon.
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Re: Maestro - Full Range Boost ( FRB-1 )

Postby briggs » 05 Mar 2008, 10:45

I already made a tubescreamer style design that does exactly that. It was sold at one point too :) I'll be getting the go ahead to post the design/schematic soon 8)
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Re: Maestro - FRB-1 Full Range Boost

Postby mirosol » 21 Apr 2016, 20:21

The link's dead, so here's AG's schem..
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