unknow transformer. help!

Pief · Apr 8, 2018

Picked this one up from a basement. Ratios looked usuable.

Would like to know what it is...

Anyone seen this or similar before?
On the back it says "tropenfest". Thats German thats it endures heat and moist air.

Anyone?

Murdock · Apr 8, 2018

those ratios look very usable. can you remove the case? sometimes there is a sticker on the transformer itself.

Pief · Apr 8, 2018

M urdock,
No...nothing there. Except the "448" stamp.
The basement belonged to a man who collected and repaired vintage amp and radios. 1920's to 1960's.
Most likely the transformer will be from within those years.

The stamp/logo says ""AKT" i think.

rock soderstrom · Apr 8, 2018

"tropenfest" sounds to me that this transformer belongs to a military radio set or scientific measuring device. Did you test the frequency response?

Pief · Apr 8, 2018

No not yet, i just got it yesterday.
As a matter of fact i would not know where to start doing that. What would be an easy way of doing that without a dedicated signal generator?

rock soderstrom · Apr 8, 2018

Your audiointerface + RMAA is a start

http://audio.rightmark.org/products/rmaa.shtml

cyrano · Apr 9, 2018

I think "GK" is from Telefunken. IIRC, it's used in the military radios they built before WWII.

Don't remember what it stands for, though.

unknow transformer. help!

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