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Thread: Radford TT100 - the saga begins...?

  1. #11
    Join Date: Sep 2012

    Location: London

    Posts: 275
    I'm Nick.

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    So... here's a quick update. I had the cover off this afternoon and took some pics inside. It all looks quite a mess to me but I don't really know about these things, or what constitutes reasonable condition in an amp of this vintage? Certainly a lot of grime and fluff in there. Maybe someone here could take a look at the pics and tell me what they reckon as to the state of the important bits.
    The loose part rattling around was just a screw. It may have been part of fixing the 4 blue capacitors (I assume) in place, as that whole assembly has come loose and is wobbling about quite freely. The 4 blue tubes were all blue-tacked together presumably to hold them in place. In fact there's quite a lot of blue-tac in evidence inside.
    The chap who sold it to me told me he tried it out by putting a modern plug on it, then replaced the vintage one to 'keep it original'. When I told him I was getting it checked out by a qualified tech to make sure it was working as advertised, he started getting a bit upset and implied I was trying to make trouble (!) and maybe I should just return it to him.
    It's booked in for a visit with David next week. What do you think, should I stick or twist?

    IMG_0490w.jpgIMG_0488w.jpgIMG_0491w.jpgIMG_0492w.jpgIMG_0489w.jpg

  2. #12
    Join Date: Feb 2008

    Location: Middlesex, UK

    Posts: 3,287
    I'm Alex.

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    Did you buy on ebay? If so, and sold as used, it must be working, otherwise a refund is in order.

    I guess the transformers are the most important parts.
    Spendorman

  3. #13
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 7,183
    I'm AnDreW.

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    See what David has to say. The TT is a very rare amp and probably one of the best. It's not a STA100 but a later update if you like. My Sondex S100 is another update from your TT100 and my Sondex ain't going anywhere so it migfrht be worth while getting a report from David, use this as a bargaining chip and see if you can get some more money from the seller, it may just pay for your repairs (if you need them). There should be NO blutack in that amp whatsoever.
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  4. #14
    Join Date: Mar 2017

    Location: London N2

    Posts: 755
    I'm Edward.

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    Hopefully the transformers are still good to go. But even then Will at Radford Revival probably still has details of the original windings and can have new ones made up but .

    Point David to the following page at RR which has schematics etc.

    http://www.radfordrevival.co.uk/literature/tt100/
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  5. #15
    Join Date: Aug 2008

    Location: Suffolk, UK

    Posts: 1,221
    I'm Paul.

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    It loks like possible capacitor (4) and resistor (1) replacement, plus a bodged DIY upgrade with the yellow capactitors. Its a 600VDC circuit, so I think your right to get it checked out. I suspect the blue capacitors are replacements that are physically larger than the orginals and didn’t fit in the holders, so a bit of Bluetack was used.

    With 600 volts running through there I’m astonished that anyone would do that. Amazing what goes through some peoples heads!
    ~Paul~

  6. #16
    Join Date: Sep 2012

    Location: London

    Posts: 275
    I'm Nick.

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    No. I didn't buy through ebay but I made sure to pay by Paypal with buyer protection (even though seller insisted on Friends & Family, make of that what you will).

    I will definitely get it looked at by David before making a decision. As it is i would be nervous about even switching it on, it looks like a fire hazard to me!

  7. #17
    Join Date: Feb 2008

    Location: Middlesex, UK

    Posts: 3,287
    I'm Alex.

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    Quote Originally Posted by nickbaba View Post
    No. I didn't buy through ebay but I made sure to pay by Paypal with buyer protection (even though seller insisted on Friends & Family, make of that what you will).

    I will definitely get it looked at by David before making a decision. As it is i would be nervous about even switching it on, it looks like a fire hazard to me!
    Best tested with a light bulb is series with the mains, or a variac to bring the voltage up gradually.
    Spendorman

  8. #18
    Join Date: Oct 2016

    Location: London

    Posts: 48
    I'm David.

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    Thanks for all the pointers for circuit diagrams etc guys. I'm looking forward to sorting this one out! And yes what better once sorted to test it on than some Tannoys!
    David

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  9. #19
    Join Date: Sep 2012

    Location: London

    Posts: 275
    I'm Nick.

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    oooh lovely, David! Hope to hear them one day!

  10. #20
    Join Date: Feb 2010

    Location: Berkshire, UK

    Posts: 3,026
    I'm Tom.

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    With friends and family you have no protection at all ... though as Andrew says above this is a very rare amp and well worth getting sorted. Will is actually very reasonable when it comes to parts should they be necessary.
    Main: Speakers 'RFC' Tannoy Canterburys / custom crossovers; Amp - Radford STA100; Pre EAR 912; Vinyl: Thorens TD124 MkII + Ikeda IT345-CR1 / Ikeda IT-407 tonearms; Cartridges Stereo - Miyajima Madake, Ortofon SPU Royal N, Ikeda 9C III, SAEC/Excel C3; Mono - Miyajimas - Zero 0.7, Premium 1.0, Sonovox MC-4 1.0, Edison '78' 4.0 conical, and Shure M44 strapped for mono with several Expert Stylus conicals for different eras of 78s; Phono stage and SUT from EAR 912; Esoteric Sound Re-Equalizer for equalisation of early mono and 78, switchable in from tape loop; Digital: Audio Note CDT2/II transport, heavily modded AN Kit DAC + Mutec MC3+USB.

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