Maestro Ranger Overdrive

 Schematic is avaiable HERE.

 

Maestro MFZT-1 Fuzztain

 Verified and drawn by Chris Stelloh!

Schematic is avaiable HERE.

Maestro MFZT-1 Fuzztain

 Per request. A slightly modernized take on a Moog designed Fuzz/compressor hailing back from the 70s. The signal path remains true to the original but the rotary switch has been removed in favour for a variable fuzz control. And the two compressor settings is now fed through a toggle switch. The CD4007AE IC might be hard to source but it is avaiable at Ebay.

Schematic is avaiable HERE.

 

Maestro Fuzz Phazzer FP-1

 The layout is based on Brian Kepharts modernized version of this weird, fun and old device.  

HERE is a link to a very detalied description of this circuit, schematic, bias setup and explenations of the small but useful modifications.

Maestro Fuzz Phazzer FP2-3 - modified

 

This one belongs to the category " old, weird and forgotten". Maestro Fuzz Phazzer was an odd piece of gear, a gnarly fuzz based on Maestro FZ-1S Super fuzz followed by an optical discrete phaser circuit....without a LFO. The sweep was controlled by a foot treadle which also acted as a volume control in "bypass" mode.

I had to do some modernizations for this. First, true bypass. Second, get rid of that  dual gang 30k phase/volume potentiometer. I replaced it with a single 50k pot so you can use either a normal wah pot or a normal potentiometer. The volume function is lost but I added a master volume control at the end of the circuit.

There are some things that need to be tested as well; the LDRs and the mini lamp. I can't find any info on the stock parts but a good start might be socket some Univibe LDRs and a random mini lamp with solder leads.

 

 

 

 

 

 

 

Maestro FZ-1S Super Fuzz MOJO layout

 Compact layout avaiable HERE.

 

 

Maestro Brassmaster MOJO layout

 Compact layout avaiable HERE.

Maestro OB-1 Octave Box

 Another old octave down circuit with a forest of transistors.... It also have a rare part, MFC-4040 which were a 4.pin divider/flip-flop IC. It went obsoltete in 1975 but according to several sources, NTE754 is a direct replacement. R12 and C21 is marked as "factory tailored component" in the factory schematic so these needs to be socketed and tested. And yes, there is a 1,4uF cap under Q4 but a 1,5uF will do.

Maestro RM-1A Ring Modulator

 A requested circuit but bear in mind that it is rather big, has an onboard charge pump for 15v-15v operation, and has a quite complicated setup due to five multiturn trimmers.

I've omitted the (for now) the Osc, Pitch, Carrier and Modulation jacks but might add it later on if is requested but it will be an "offboard wiring extravaganza".

 Schematic is avaiable HERE

Trimper setup is avaiable  HERE

 

 

 

 

 

Maestro MP-1 Phaser

Maestro FRB-1 Full Range Booster

With added voltage doubler since original units had two 9v batteries.

Maestro FZ-1B

Maestro FZ-1 Fuzz Tone

Maestro MFZ-1

Maestro FZ-1S Super Fuzz

Maestro Brassmaster