Good Evening All,
That's 6 weeks away from home on this boatie now..............
The Naxo finally found its way to Holborn Hi Fi on Saturday
Been doing lots of reading (there being plenty of time......).
Just been reading the 1980 Audio magazine article by Walt Jung and Richard Marsh on capacitors.
Given the enthusiasm expressed for 47uF MMK polyester devices being used to substitute in the feedback position in place of such as tantalums in the Avondale and HackerNap devices where this article has:-
“Polyester types are the most widely available for all the films and are already widely used in many audio circuits. There is no doubt that this is due to the generally low cost of these capacitors, but convenience and low cost should not be primary selection criteria to a critical audiophile. Polyester capacitors can be readily heard in good systems, with defects similar to those described for tantalum but, of course, reduced in magnitude.”
and
“In our opinion, polyester capacitors should be very carefully applied in an audiophile’s system and any system using them in the signal path may, potentially, benefit by the substitution of (equal value, voltage and tolerance) polyproplenes or polycarbonates. We have done this ourselves on different items of equipment, tube and transistor, with always the same result, a stunning upgrade in sound quality”
I have a pair of the AVX 68uF/ 75V polyester jobbies to try in the HackerNap so will be able to form my own opinion.
The only thing outstanding to enable me to build a HackerNap now is a ModuShop (other manufacturers area available) case - oh and being at home.
Regards
Richard