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  1. Steerpike

    EL84/6BQ5 consequences of repurposing pin1 "spare" socket-pin position

    Original data sheets usually designate such pins as " I c" (= internal connection), which means it may or may not be attached to anything, but should not be regarded as floating and not available for tag-strip use.
  2. Steerpike

    Members who have had the jab.

    Who decrees which company's vaccine you get?
  3. Steerpike

    What was the last Film you watched?

    John Waters' "Pink Flamingoes". It's been on my list to watch since VHS was the only format, finally I watched it this week. Intersting, although the general degeneration of TV makes it completely unshocking compared to typical modern material. But 1970s audiences were understandably appalled.
  4. Steerpike

    Opinions on vintage CD players (circa 1989/90, top of the line)

    This is as modern as I get - or desire to get:
  5. Steerpike

    Best way to remove dust from inside AV receiver.

    Vacuum cleaner that has a 'blow' option.
  6. Steerpike

    What AV beliefs did you have that no longer apply and Why ???

    No. Has never had any scientific or engineering backing whatsoever.
  7. Steerpike

    Analogue Vs Digital

    This strongly suggests both your records are in poor condition and your cassette recorder is faulty.
  8. Steerpike

    Very interesting

    Strictly speaking a mono signal would produce only vertical modulation of the groove. However the record industry adopted a convention of inverting the phase of one channel so that mono does indeed become horizontal motion/modulation only, because this is far easier for the stylus to track than...
  9. Steerpike

    What is the best speaker connection?

    Not pretty and possibly a little impractical, but electrically you won't easily do better than this:
  10. Steerpike

    Monitoring incoming Voltage at DB Board

    The formal specification is 230V +/- 10%, so any voltage from 207 Vrms to 253 Vrms is "normal" and not a fault condition. You shouldn't expect it to be 230 or 240. You are also not allowed in the distribution board unless you have the appropriate license - abilities and education mean nothing...
  11. Steerpike

    1984 from novel to fact

    Other than occasional internet (which I've had from home since 1986, so I'm not entirely luddite) I use not one of the items in that list.
  12. Steerpike

    1984 from novel to fact

    I think you're a bit premature. "The machine stops" is more a short story than a book, but a very good read, beautiful language too - which you don't find so often in recent publications.
  13. Steerpike

    Black CD - What is this ?

    As Dacman said, the playback light is 760nm, just on the near infrared/visible wavelength boundary. The visible colour of the plastic can be very different to its infrared transparency. They can make the disc look almost any colour they want without affecting functionality. I have discs of...
  14. Steerpike

    Philips AG9015 - interesting output stage

    Serendipitously, we have just acquired (a gift from a kind collector) the high-end turntable that paired with the AG9015 or 9018 amplifier. The tt is 12kg, not flimsy like its successors.
  15. Steerpike

    6600uf amp caps reading as 7400uf?

    Of course! Typing faster than I was thinking: that is what happens when you reverse the polarity of the cap - and the degeneration of the oxide causes it to go short circuit.
  16. Steerpike

    6600uf amp caps reading as 7400uf?

    Aluminium electrolytic capacitors do not contain oil. The dielectric is a microscopically thin film of aluminium oxide grown onto the aluminium foil during manufacture by an electrolytic reaction induced by the application of a polarising voltage. The exact electrolyte composition is a highly...
  17. Steerpike

    Contact cleaner which one for volume pot?

    The light and the audio signal path through the pot have nothing to do with each other. The intermittent light suggests a bad connection to the section with the pot in it - perhaps dry solder joints or a crack on a pcb. Putting contact cleaner in the pot will not fix that. Contact cleaner...
  18. Steerpike

    Lexus - for vinyl spinners

    Strange that some people think this is a new idea. Philips had the Mignon car record player in the late 1950s - early 60s, and Technics promoted their SL10 for use in cars in the early 80s.
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