FAL Super 100 4 channel PA

[Bandito]

Hello!

Who can share a schematic for a FAL Super 100 4 channel PA amplifier?
Who would repair/resuscitate it for fun?
https://www.thegearpage.net/board/index.php?attachments/s-l400-jpg.835074/

Mine looks tattier but it makes a noise, is not dead.

Cheers, Bernd.

[J M Fahey]

You place too much trust in our divination skills

We don´t even know what *Country* you are in, let alone state or province  

[g1]

Maybe this one (corrected version)

[J M Fahey]

Thanks G1

Looks VERY much like an unauthorized Traynor clone, which also made a similar 4-passive-input mixer PA, YVM something.  YVM4?

Doubt anybody will "repair it for fun" though.

But maybe all it needs is some love and care: clean all pots and jacks with Deoxit or similar good quality product, (NOT WD40), check all wires are intact, etc.
Schematic apparently hints at a plug-in board.
If so, pull it, clean socket with compressed air, squirt Deoxit on contacts and wipe them with clean paper towels, etc.

It "should" work.

Do NOT start pulling parts at random "justt check them", you will needlessly damage the PCB.

A gut picture could help

[Bandito]

Excellent! I am East Devon, UK. Done the cleaning. The Amp works but sounds weak and different on channels 1/2 compared to 3/4.  Has 3 sockets for speakers.  1 and 2 (straight parallel connection) work, but the slave (3) does not. Is this a "good" amp, worthy of investment?

[J M Fahey]

Excellent! I am East Devon, UK. Done the cleaning. The Amp works but sounds weak and different on channels 1/2 compared to 3/4.

It should.
Channels 3-4 are Instrument (Guitar/Bass) level so  more sensitive, 1-2 are high impedance Line level, think a Grammophone with a crystal/ceramic pickup, a radio tuner or tape recorder output, etc.
Any modern pedalboard would work fine there.

If you want to convert 1-2 to 3-4 specs, replace current 1M pots and 1M mixing resistors with 50k pots and 47k rtesistors, look at inputs in the schematic kindly provided by G1

Has 3 sockets for speakers.  1 and 2 (straight parallel connection) work, but the slave (3) does not.

1 and 2 are regular speaker outs, 8 ohm impedance *total* so 16 ohm each if using both.



The 3rd one, clearly marked Slave, is NOT a speaker out but a Line out, meant to drive an extra power amp with its own speakers.

Old school design, not surprising in an early 70s amp.

Is this a "good" amp, worthy of investment?

You should ask your Financial Manager for that.

In my book, for a Musician, Amps (and Instruments and any Musical stuff) are either useful, good sounding, etc. or not.

I reserve the word "investment" for Tesla stock, gold, Bitcoin and similar stuff.

FWIW that amp is quite old style but very well made, working fine (except for some "cleaning" issues, of course) for 50 years now.

[tonyharker]

That appears to be derived from an old (now) RCA circuit. Note the transistor types 40xxx all RCA type numbers.

[Bandito]

Sold. Gone. No more worries