3 stage amp?

LT1028 is three stages IIRC. Maybe there was a paper on it.

Google is pretty handy. Try searching on "amplifier tutorial" or "amplifier design" or, well, you'll think of something.

Or, you might find something in the textbook or at your engineering library.

Good Luck! Rich

Google search for "plastic tiger amplifier" and "lil tiger amplifier". Assumes 1) you want to build an *audio* amplifier, and 2) you know how to find replacements for obsolete parts.

And can find the 40 year old magazines.

Define "stage."

John

and 3) you can figure out why it was referred to as the "flaming tiger amplifer". They had a somewhat evil reputation for burning up when in use.

You mean these?

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The 'tiger' was pretty decent though the 'universal tiger' was a flame thrower.

G=B2

Most likely a three transistor amp. (At least that's what we had to do.)

Design it with X input impedance, Y voltage gain and Z 3dB frequency. X,Y and Z would change from year to year. I remember that our design was done before they told us in class about the benefits of negative feed back....

George H.

Those are scans. I knew that 'South West Technical Products' had put them on line, and that they originally supplied the kits in the '60s & '70s. I said magazines. Some people still have the original paper versions. I built the 'Tiger' from the magazine, not from a kit while I was in high school.

The basic circuit was lifted directly from a late '60s RCA transistor databook. It was in the next couple editions, as well. Some crappy industrial PA amps used the same circuit and were not reliable. I scrapped more than one with most of the transistors shorted, and holes burnt through the PC board when the emitter resistors caught fire.

The 40411 transistor is a 100V version of the 2N3055. The 40409 &

I also built the preamp from the magazine, which was another RCA design from the same databook. About all they did was lay out a PC board and create a BOM for both projects. this was typical of hobby electronics magazines at that time.

It's amazing how often the same few 45-year-old old audio amp circuits are repeated with minor, usually silly, variations.

John

Insane 'Rubber Stamp' engineering at its worst. :(

..that is the platform where actors "do their thing"...

Instant deja-vu :-)))

What needs amplification?

You need to know that first. Your first stage may not even be electronic.

RL

You can get a lot of low-noise voltage gain from a transformer.

John

...or a latching relay.

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I HAD those magazines when they were new but I was in high school at the folks house and the mags have long since been in a landfill (before we recycled). I was just pleased to see them in _any_ form.

I built a pair of the Tigers - I think from kits - teamed up with the

G=B2

Here is a 3-stage amplifier for you:

It has a lot of gain; just what you asked.

Determine the resistor values as design exercise.

Advanced students can add arbitrary number of stages, as long as the total number of transistors is the odd.

VLV