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  1. ColinWonfor

    The new M40 SECA DRIVE power AMP

    Here is the block diagram comments please. And I do draw badly .
  2. ColinWonfor

    DC Blocker Plus

    Here FOC a DC Blocker Plus a Few odd Bits. And Gerber Files enjoy.
  3. ColinWonfor

    Are the Queens awards a Joke ?

    Applications for the 2022 Queen's Awards for Enterprise open on May 1, 2021. Guess what my old cable designs MD (he he) applied and got it again like when he applied for tax grants on RD that I did. And all the other freebie meaning less garbage, but greed dies with the man, and soon GM soon...
  4. ColinWonfor

    LS 25 and LS40 and the LS80 on public run.

    See Pinkfish for coments. EWA LS80 speaker cables Elsdon Wonfor Audio LS-40 speaker cables Elsdon Wonfor Audio LS-25 speaker cables Next question are you all well ??, just had my jab here, But the cold has made my bones hurt.
  5. ColinWonfor

    The New M50A

    The M50A is biased to 35W Class sliding to A/B. The heatsink is the chassis and temperature controlled not to go above 40C (unless you are already at 40C), So in a home at 25C the max temp was 37.8C On start up the idle current is set to be twice the running current so the M50A quickly get to it...
  6. ColinWonfor

    Mains cable why?

    Just a note, First question how does the PSU deliver current to the load ? is it 50/100Hz (60 120Hz) or can the load demand in short bursts? If it is short burst and at highish speed lets say 100uS at 20V RMS into 4Ohms how does the bridge rectifier and the mains top it up? Does the 50Hz take 10...
  7. ColinWonfor

    Health Check

    Hi All, Is everybody in good health? It has been shit here in Lock down and in London, all my hospital visit have been cancelled and I miss my nurse Maxine and her coffee. Well today St Barts hospital near St Paul.s in the centre of London have asked me to come in, I am worried I hate trains...
  8. ColinWonfor

    A new type of pot/volume control

    Well now forced to stay indoors and my pit I can do some R&D work so first project is a volume control using optics. It will allow us to have any value and multi channel pots at any pre-fixed value i.e. 10R-1000MR and either Log/Anti Log or Linear well any curve you want basically. The track...
  9. ColinWonfor

    Cheap do build a DC blocker

  10. ColinWonfor

    A modified theme. For the Hitachi/Maplin power amp

    This is based on the Maplin/Hitachi theme these board are stereo and use much better and rugged FETS. The PCB is stereo and you build it, It gives 100W RMS into 8R Each PCB blank will cost £40 it is double sided 2oZ Cu with silk screen. A modified theme. For the Hitachi/Maplin power amp | SECA
  11. ColinWonfor

    A question on Wigwam about TQ cables.

    XLR listening test into ATC 40 actives A question on Wigwam about TQ cables. 1) Firstly TQ cable is not made with ferro material in the plastic , as this would grind down the tooling a would cost TQ to much money, and also I have done the experiment it would be the wrong magnetic material (to...
  12. ColinWonfor

    No More Semelab Audio FET's for Inca Tech Claymore's

    No More Semelab Audio FET's Sorry Claymore fans, the upgraded Semelab Audio FET,s I used the replace and upgrade Inca Tech Claymore have stopped production. I have enough to complete the upgrade of the two Claymore's that I am doing now ONLY. The hopeful news is I think I have found another...
  13. ColinWonfor

    Nesting LS 25 Cables.

    A nest of LS25 speaker cables on there way to new homes.
  14. ColinWonfor

    Glenn;s new Q20

    Thank you Glenn for allowing us to use your lovely write up on the Q20. Hi Colin That was a most unexpected phone call Saturday afternoon but a very pleasant one and it was great chatting with you . So as promised I thought I would drop you a line and let you know my first impressions of the...
  15. ColinWonfor

    Oh crap my 65th Xmas

    Merry Christmas to all from the designer and founder of EWA cables and Amplifiers and of many other products. Many of which have won awards for Colin and the associated companies now and in his past.
  16. ColinWonfor

    Skills or Market Guru,s

    Yesterday was as sad disappointment and a big eye opener for me. On Tuesday I delivered for the best Hi-fi Dealer of Inca Tech Claymore from the 1980,s a retro Claymore we now make. Whilst there on the counter was a DUFF modern expensive integrated amp with a combo CD player, it was opened...
  17. ColinWonfor

    BOM downloads in Window XL

    SECA 20W iss 2 BOM in old XL and a newer version.
  18. ColinWonfor

    Retired old brain busy

    Well I can,t stop thinking of designs. So I am now keeping my retired old brain busy, the first is a SECA Twin Headphone Amp with two DAC,s Then I will go back to my favourite non audio love, yes you guessed it chocolate, NO PSU designs working on a ultra low noise low impedance range. 3.3V,5V...
  19. ColinWonfor

    Twin SECA Headphone Amp

    OK got bored just finished a "Twin SECA Headphone Amp" It has two Headphones out 5W max each Two DAC inputs and two line in inputs. HP 1 can see inputs DAC 1 and Line 1 HP 2 can see inputs DAC 2 and Line 2 Ideal for couples who hate each others music. PIC's soon.
  20. ColinWonfor

    A Blast from my past.

    No not a old girlfriend sorry. A blast from the past the predecessor to the Q20 Series, it a Inca Tech Dirk I did to go with the FMT tuner we did, which was fitted with 8 line input selector and are even rarer. And 50W/Ch and two line inputs. On Ebay...