R.C.C. Unit

R.C.C. Unit. 

This resistance capacity coupling unit is contained in a highly polished black moulded case, measuring about 2¾” by 2¾”  by ¾” high. Two lugs, moulded on, are provided for baseboard mounting. On top of the case are four medium sized nickelled terminals, with the usual indications moulded on the case. Inside are the components of the unit, a composition anode resistance, impregnated strip grid leak, and copper foil and mica coupling condenser.
Price, 6s. 6d. retail.
TEST RESULTS. -On test we found that the approximate values of the components were: Anode resistance, 200,000 Ω, grid leak, 1.8 MΩ and coupling condenser, .0011µF. Thus, the unit is best used following a valve of high A.C. resistance, say 40,000 to 60,000 Ω. Used after a valve of the latter value, the results obtained from the unit were perfectly satisfactory, very good tone resulting from the combination. We should advise the use of a grid leak of better material, as that at present used might possibly give trouble, particularly in damp and hot climates. The anode resistance would appear to be satisfactory, as, although it is not wire wound, it is of a robust nature, and carries the small current of a valve of high A.C. resistance with ease. The coupling condenser is also satisfactory, and showed a high insulation resistance when tested at 500 V D.C. This, of course, is most important in a coupling condenser used in an R.C.C. unit. Altogether, this Saxon unit is a well-made product.

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Tous les appareils de Saxon Radio Co.; Blackpool Lancashire