Gardners A F Matching Transformer MU 5767

[masterjuicer]

Hello
Please see enclosed picture of a recently acquired unused Gardners A F Matching Transformer MU 5767 and wondered if anyone could assist with application notes and/or circuits/schematics for use with microphones etc.
Many thanks

 

[thomasdf]

Tube mic preamp input seems like a good application with 150:50k
Or line, using the 600 primary.

 

[Rob Flinn]

Try this.

 

[masterjuicer]

Thanks for the suggestion & product details. Do you have any suggestions for application circuits?