Telephone AGC??

scott2000 · Apr 19, 2019

Picked this thing up cheap....couple of nice parts and a pretty cool chassis..... says telephone amplifier on it.....

figured I'd try to draw what was in it ..... actually just used a 436 drawing modified.....seemed pretty close......

Anyhow, pretty sure it's close to right......pretty weird..... guess I can look at voltages.....probably 200 ish b+...transformers tapped for 600ohms...input/output

mjrippe · Apr 19, 2019

Dammit! I snoozed on bidding for that unit. Thank you for sharing the schematic and congrats on the nice score!

mjrippe · Dec 8, 2019

So many moons later, Scott decided to sell me this thing because I wanted to play with it and then harvest the parts. I had his earlier schematic, not the one above, so I added to it and corrected one connection on the output. Also I found the builder's name, a date and call letters inside. Preserved here for anyone who cares

gyraf · Dec 9, 2019

Thanks!

rackmonkey · Dec 12, 2019

What we’re your observations playing with it, Mike?

mjrippe · Dec 12, 2019

It was a pretty utilitarian implementation which I am sure worked as intended but it did not offer anything special from a recording point of view. No clever tricks or secret sauce

I am happy to have the transformers, but now the metal enclosure is haunting me with it's dual cheesy plastic meters for eyes...

pucho812 · Dec 12, 2019

the labels are awesome... nothing like old dymo labels, squeeze the trigger on the machine, turn to dial to the next letter you need, squeeze the trigger again. classic stuff right there.

rackmonkey · Dec 13, 2019

pucho812 said:
the labels are awesome... nothing like old dymo labels, squeeze the trigger on the machine, turn to dial to the next letter you need, squeeze the trigger again. classic stuff right there.

Indeed! I have a big, heavy metal industrial one that uses aluminum foil tape. Looks pretty cool for quick and dirty labels on homemade test gear.

mjrippe said:
...haunting me with it's dual cheesy plastic meters for eyes...

if you look at it just right it looks like it could be talking to you.

thanks, Mike.

Telephone AGC??

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Telephone AGC??

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