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Thread: Hi from Arkless Electronics

  1. #1

    Default Hi from Arkless Electronics

    Some will know me from other forums but I just found this one and if I'm interpreting the rules correctly then trade members are allowed (??).
    I repair both solid state and valved amplifiers and related analogue equipment, carry out refurbs on older gear and as many will be aware I "manufacture" the Arkless/Cambridge 640P phono stage (a google search will reveal all!).
    I'm happy to answer sensible technical queries on most analogue matters for members but no "foo" please!
    Cheers,
    Jez Arkless.
    Last edited by Arkless Electronics; 18th August 2014 at 14:49.

  2. #2
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    Hi Jez. Welcome to the forum.

    I had a quick google re the Arkless 640p and it looks interesting. Some sensible improvements there. Nice to see you've changed those op-amps to something better. We have a specific trade section on the forum if you want to set up a room. See Kenny (Cartridgemangler) for details. We also have a specific DIY section if you want to post anything relevant there.

  3. #3
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    Welcome aboard Jez
    Garrard 301 with SME 3012, Garrard 401 with PU7 both in slate plinths, Puresound P10, Highphonics SUT, Glasshouse TVC Passive Pre, Bel Canto Set 40 (845 power amp), Tannoy GRF Memory`s

  4. #4

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    Thanks for the welcome

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    Welcome, this is a foo free zone apart from the tat the prof buys.

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    Quote Originally Posted by TIU View Post
    Welcome, this is a foo free zone apart from the tat the prof buys.

    Lol, welcome Jez, yeah I'm all foo'd up at Prof towers.

    Jez how low an output cart is your modded 640p able to handle?

  7. #7

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    Quote Originally Posted by The Professor View Post
    Lol, welcome Jez, yeah I'm all foo'd up at Prof towers.

    Jez how low an output cart is your modded 640p able to handle
    ?
    This is of course a function of the noise level of a phono stage. It is intended for "normal" MC carts with around 0.5mV output but should be fine with lower outputs of 0.3mV or so. Most customers have commented on the low noise floor.
    Even 0.1mV could be accommodated if I set the gain a bit higher to suit (which I can of course do on request. It already has higher output than a standard 640P/651P BTW) but some people may then find it a bit noisy depending on their individual tolerance to such things and type of music played. I guess it would still be fine with rock etc but a quietly recorded solo violin may show up the hiss if the unit is set for 0.1mV....
    For very low outputs of below 0.1mV (Audionote Io etc) then a SUT used with the unit set to MM would be the quietest.

  8. #8
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    Thanks for a comprehensive answer Jez, yes low output has it advantages, needing a higher gain isn't one of them, as you say hiss can be quite evident especially in quiet passages at high volume. Do we need to provide a 640p or do you have them available to sell already modded? And roughly what do you charge?

  9. #9

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    Quote Originally Posted by The Professor View Post
    Thanks for a comprehensive answer Jez, yes low output has it advantages, needing a higher gain isn't one of them, as you say hiss can be quite evident especially in quiet passages at high volume. Do we need to provide a 640p or do you have them available to sell already modded? And roughly what do you charge?
    Customers need to supply a 640P or 651P as a donor unit. It needn't even be working as the mods are so extensive that any faulty parts would be replaced anyway.
    It's 160 + 11.50 postage for the basic mods. This includes a set of loading plugs which can be to any spec but 100 Ohm for MC is provided by default. The unit is supplied as either MM OR MC according to a customers requirements but for an extra 25 a switch can be fitted to allow selection of MM or MC.
    A "Turbo" version is available at 330 which has further mods. A unit with the stage 1 mods can be uprated to "Turbo" spec at a later date for 180.
    There are copious details and loads of user reviews etc on pfm if folks take a look there and do a quick search (I'm banned for another week)
    Oh, P.S. There is a demonstrator unit for the stage 1 mods (it has the MM/MC switch) available if enough people on this site are interested to hear it, say 3-4 minimum. This would be on the same basis as I did it at pfm ie I send it to the first on the list who then pays postage and sends it to the next etc....
    Last edited by Arkless Electronics; 20th August 2014 at 15:03.

  10. #10
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    Thanks Jez, will have a trawl through the PF threads, do you have demo models at all?

  11. #11

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    Erm.... yeah... see above!!

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    Quote Originally Posted by Arkless Electronics View Post
    Erm.... yeah... see above!!
    doh!!!

    in my defence i read your reply via the notification email, and then quickly answered, therefore i did not notice your edit. Interesting let me get back to you on it.

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