The 1972 GT.5 Audio Frequency Transformers
Gardners Ttansformers Limited, Christchurch
has just been skim read.
Here are elements that were found important:
Print quality.
How large the new factory is seen in pictures.
That the company had been modestly started by 2 brothers.
That the very very high bandwidth Super Fidelity wide band microphone and line matching transformers were toroidally wound.
Typically plus or minus 0.2dB to 80KHz for MU.7582.
Typical examples:
MU.7582
MU.7584
MU.7590
Ultra high permeability Nickel-Iron core had been used.
The standard MU.7513
MU.7514 etc
were published typically +/-0.5dB 50Hz to 10Khz which may also be a good thing, see previous post.
Many ranges of bandwidth were available in between.
No comments:
Post a Comment