Mysterious UTC X-2806 / RCA 949426-2 Transformer

[snoopyma]

Dear all,

I have just located a big round beefy transformer (black in colour) with the following label: UTC X-2806 RCA 949426-2. It has 10 wiring taps at the bottom.

Despite my efforts in googling and searching thru' the UTC catalog, I can find no information about this. It appears that it is a UTC transformer specially made for RCA.

Any clues? Thanks for any information.

Best Regards,
TC MA

 

[Wavebourn]

1. measure DC resistances to figure out windings.
2. connect a sine wave generator through a 560 Ohm resistor to the winding with higher resistance and check what is going on on different frequencies.

First of all, do step #1 and report what you've measured.

 

[snoopyma]

Sorry, it should be 8 wiring taps instead.

Dear all,

I have just located a big round beefy transformer (black in colour) with the following label: UTC X-2806 RCA 949426-2. It has 10 wiring taps at the bottom.

Despite my efforts in googling and searching thru' the UTC catalog, I can find no information about this. It appears that it is a UTC transformer specially made for RCA.

Any clues? Thanks for any information.

Best Regards,
TC MA

 

[snoopyma]

1. measure DC resistances to figure out windings.
2. connect a sine wave generator through a 560 Ohm resistor to the winding with higher resistance and check what is going on on different frequencies.

First of all, do step #1 and report what you've measured.

Hi Wavebourn,

Thank you for your advice.

The DCR values of the 8 taps are:

1-2 5.6 ohm
3-4 0.1 ohm
3-5 0.2 ohm
4-5 0.1 ohm
6-7 0.2 ohm
6-8 0.4 ohm
7-8 0.2 ohm

Regards,
TC MA

 

[Wavebourn]

Looks like a line to speaker (or filament?) transformer.
Can you connect now a sine wave generator to the primary (1-2) and check a frequency response?