Output Transformer Measurement
We’ve received feedback that some says, your transformer
measurement technique is not representative of what it will be in actual
circuit as it is measured with “perfect” source. In actual fact, the bandwidth
of the output transformer will be lower due to “real” source being used.
We can understand meaning of that. Perfect source means that
equipment like the function generator, LCR meter, audio analyzer and such are having
very low output impedance and low output capacitance, therefore, the results
measured will be very wide in bandwidth due to such criteria.
Above is true, but it is still needed to do so. Why? We need
to measure the real performance of the transformer, independent of the source.
Only in that way, we know the real performance of the output transformer and we
can have apple to apple comparison between transformers.
If we don’t use that and use a real amplifier with real
output impedance in the region of hundreds to thousands, the measured results
will not carry any meaning as the reference will be varying among the people
measuring it. One measures with say, tube A, another guy measures with tube B.
Even if both use same tube, the batch differences, circuit differences, input
source differences, equipment stability, wiring differences, chassis
differences, power supply differences, mains differences and many other factors
will pollute the measured data and carry no meaning at all for benchmarking.
Therefore, it is required that all of us use the same
standard measurement equipment that is calibrated by standards laboratory for
measurement. This is the industry standard way.
Of course, testing it in real environment is something we
will do as well to again, look at the output transformer in another perspective
for evaluation purposes.
J&K Audio Design
21/12/2013
Product Lists
Level 0
Product Lists
Level 0
Level 3: depends on type, size and complexity. Email us for details.
* Finished
amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our
core business and we do it out of passion. We do not
have fixed models, fixed price and we customize for each individuals.
The sky is limit of creativity.
* Our product lines are always improving and increasing. If you do not see what you want, contact us!
* Please email for volume discounts, distributor and OEM pricing.
No comments:
Post a Comment