I haven't done the sort of testing that you must do for your applications,
but I've used the OEP8000 transformers in several applications with good
results for speech only. I've no idea of its high frequency response. They
are tiny in comparison.
http://www.oep.co.uk/admin/UploadDocuments/OEP8000.pdf
David
G3UNA
I've ordered a couple of TTC-108 transformers today and will run some
experiments with them over the next week or so. I've looked at similar
transformers developed for modem and telephone line coupling, but not the
TTC-108 specifically, when trying to find a cheaper output transformer to
use with the Softrock Lite receivers. There, the emphasis was more on high
frequency response, up to 100 KHz, but distortion was also a major issue.
The solution of choice in my opinion for the Softrock receivers turns out
to be a MILSPEC Triad transformer, SP-70, with excellent frequency
response and quite low distortion. In single lot prices, an SD-70 costs
about four times as much as a TTC-108.
Jack
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