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Skywave · 7th Dec 2015, 3:29 pm

On the topic of modifications to an 888 / 888A, in mine, the 6BA6 R.F. amp. has been replaced by an ECC85 in a cascode arrangement. (That mod. was made by the previous owner; I have chosen to retain it). The idea is that the cascode cct. gives a better over-load characteristic and lower noise. (If I recall correctly). That mod. has never given any problems; it was fitted prior to 1968. Recently, I had another, unmodified, 888A here and did a few qualitative comparison tests: I did not find any 'negative' results with that mod.

Al.

7th Dec 2015, 3:29 pm	#67
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: Eddystone 888A. On the topic of modifications to an 888 / 888A, in mine, the 6BA6 R.F. amp. has been replaced by an ECC85 in a cascode arrangement. (That mod. was made by the previous owner; I have chosen to retain it). The idea is that the cascode cct. gives a better over-load characteristic and lower noise. (If I recall correctly). That mod. has never given any problems; it was fitted prior to 1968. Recently, I had another, unmodified, 888A here and did a few qualitative comparison tests: I did not find any 'negative' results with that mod. Al.