BBC Audio Isolation Transformers 2x LL/88 ASC 1:1 Ratio CT 600 Imp. LL88 #1

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BBC Audio Isolation Transformers 2x LL/88 ASC 1:1 Ratio CT 600 Imp. LL88 #1

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2 off BBC Audio isolation transformers type LL/88 ASC 1:1 audio transformers with centre tapped secondaries.

 

Tested in good working order, these are full bandwidth broadcast quality audio transformers in Mu metal cans.

 

 

Although prefixed with ‘LL’ they are not Lars Lundahl made but are in many broadcast engineers opinion, their match for performance. 

 

In this case the LL stands for ‘Line to Line’  ASC refers to the fact that the transformer is bush mounting and is in a Mumetal can.

 

 

BBC Spec as follows;

 

 

1:1 ratio 

 

Primary Inductance = 10.6 Henries

 

Secondary leakage inductance 1.5mH

 

Primary winding resistance 40 ohms

 

Secondary winding resistance 65 ohms  

 

600 Ohm terminations source imp.

 

6k Load

 

 

Connections;

 

 

Red / Green – Primary

 

Yellow / Blue – Secondary

 

White – Centre Tap to secondary winding

 

 

Teslaguy

 

 

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Category: Musical Instruments:Pro Audio Equipment:Parts and Accessories
Location: Nottingham