Wonfor designed kit for sale

AntiCrapAntiCrap
in For sale
For sale:-

EWA M40 power amp £2000 phone and balance in 40W/8R auto or manual start ECO Power stereo
EWA M40p pre amp with MC/MM Aux balance in and out. £2000

5W Stereo SECA completed kit amp stereo £300
15W stereo A/B desk top amp completed kit £280
30W stereo A/B completed kit amp stereo £300
Mixed state amp 5W SECA sliding to to 30W A/B completed kit amp stereo £350
30W stereo with alps volume completed kit amp stereo £350

P/P UK included

Comments

  • quickiequickie
    Some bargains there Col 😊
  • AntiCrapAntiCrap
    edited March 19
    Yes I need some R&D pennies to do work on MAG AMP design.
    Using square law magnetics to amplifier up to 3KW 8R
  • uglymusicuglymusic
    Bargains Galore!
  • AntiCrapAntiCrap
    Dave where is the best place to photos up from please??
  • uglymusicuglymusic
    I'm not sure at the moment, Colin. A lot of free photo storage has disappeared.

    What are people using, these days?
  • cj66cj66
    edited March 22
    Deleted
    Couldn't get imgbb to work via mobile.
    :/
  • uglymusicuglymusic
     :/ 
  • KazamKazam
    Hi Colin. I'm interested in one of these and have sent you a private message. Thanks, Kaz.
  • AntiCrapAntiCrap
    Not got it please send again
  • AntiCrapAntiCrap
    Waiting for mini review from Quickie.
  • quickiequickie
    edited April 13
    O shit   :dizzy:

    Will write something tomorrow as better half off out in the morning, so can crank it up a bit  :)
  • uglymusicuglymusic
     :) 
  • AntiCrapAntiCrap
    edited April 14
     :'(  Just fired up the 5W SECA version , OK power low but I was shocked sounds better than the 30W A/B .
    Detail on classical music and image was amazing, the bigger amp better on TRex "Born to Boogie".
    Hi Dave it will be good on Jazz, so I have to dig out "Jazz and the Porn Shop" sorry not naked ladies Pawn Shop.
    Then try sound track on that movie " Yesterday" or on YT " Hippo Sings Lion Sleeps Tonight" Nephew loves it and he will be 1yr old soon. He loves music , great. B)
  • uglymusicuglymusic
    What I need is a 30W SECA. Oops... I already have a pair of them!  :)
  • uglymusicuglymusic
    I'm sure the 5W SECA would be fantastic into a pair of horns.
  • quickiequickie
    edited April 14
    Right. Where do I start.?

    The amp we built (joint effort  :)) is the mix or hybrid version, so both P/P & SECA into a lovely little heatsink chassis from Amazon, eBay etc that costs just 50 quid and measures 210mm wide x 70 high and 250 deep. 

    I've had it running for a couple of days now, and three words sum it up. Powerful, refined & poised

    This thing doesn't sound like it looks. The soundstage is wide and deep with excellent tight tuneful bass, expressive mids, and a beautiful shimmering top end. 

    The thing I like most about this amplifier (and this applies to Cols other designs too) is that whatever type of music you are playing, there is nothing in the mix that is forced or aggressive sounding even on poorer recordings, yet every instrument sounds realistic, natural and engaging like real thing. Lovely stuff. 

    Anyway, enough of my ramblings. More tunes required  B)





  • uglymusicuglymusic
    £50 for everything???
  • quickiequickie
    uglymusic said:
    £50 for everything???
    That's wishful thinking Dave  :)

    £50 for just the Chassis, and that's cheap  B)
  • uglymusicuglymusic
    quickie said:
    uglymusic said:
    £50 for everything???
    That's wishful thinking Dave  :)

    £50 for just the Chassis, and that's cheap  B)

    Just popping the possible wrong expectation some may have ;)
  • AntiCrapAntiCrap
    Hey Qucikie fibs I only soldered the fuse holders in he did the rest looked nice.
    Now made 12 of them all good.
  • quickiequickie
       :smiley:
  • AntiCrapAntiCrap
    From Mervyn.

    "A diminutive kit amp is an excellent example to show off Colin Wonfor's ingenuity and unsung skill as an audio engineer. It is a basic no frills stereo amp with no on/off switch or on light to speak off. I have the 15W A/B class version with an 80va transformer which is in the middle of the range between a 5W SECA pure Class A one and the 30W A/B version (using an 120va transformer). There is also a 5W SECA sliding into 30W A/B amp and the option to add an Alps volume control to all amps making a standalone stereo amp. Ideal for an office or bedroom system but with the right matching gear also capable of producing a very accomplished main rig sound where budgets are tight.   


    Even from cold the staging and musicality staple features off all Colin's amp stand out immediately. Yes it is a little rough around the edges but this is from a brand new amp with no run-in time on the caps or electronics. But despite its mere 15W this amp was capable of driving my Ruark Crusader 2 three way 88db speakers no mean feat without any hardness or strain. The stereo imaging is quite stunning for such a small piece of kit and the famous EWA bass is more than adequate being deep and taut. Resolution is excellent and the amp has a very fluent fast delivery.  Capable of dealing with all music genres it may not look much cosmetically but boy does it sing. Complex classical symphonies are coherent and logical and simpler jazz or folk recordings come to life with rock solid imaging and placement. Equally vocals sound real and alive. Sound staging is both wide and deep giving you a real involvement in the music making and a 'you are there' experience - quite an accomplishment for a small black box. Whilst unfair a comparison with my existing EWA A40 amp does not markedly embarrass the kit amp. Of course the A40 has more a refined sophisticated signature and a more airy sound but otherwise the lower class kit amp holds it own very well. "
  • uglymusicuglymusic
    Cool!
  • quickiequickie
    edited April 19
    Mine is awaiting a major component upgrade (thanks Col) but really don't want to switch it off  B)
  • 29mile29mile
    edited April 19
    Some pics to go with it - 

    20240418-135813






    Hope the last pic of the PCB is ok to list Col

  • 29mile29mile
    Sorry Dave pics not showing ? 
  • AntiCrapAntiCrap
    Error 404 when I tried to look are the same on PFM? then no problem.
  • 29mile29mile
    yes same pics as on PFM Col
  • uglymusicuglymusic
    It seems none of the options offered work on Vanilla Forums. I had to hack the HTML code to get them to work.

    If anyone is having trouble with getting images to load, please email them to me - send me a DM and I'll let you have my email. 
  • uglymusicuglymusic
    @AntiCrap I see the Inca Tech brand has been revived!
  • AntiCrapAntiCrap
    It to confuse folk. 
  • AntiCrapAntiCrap
    Just completed my SECA pre, I think Quickie has also.
  • uglymusicuglymusic
    AntiCrap said:
    It to confuse folk. 
    I like it. But I'm habitually confused.
  • uglymusicuglymusic
    AntiCrap said:
    Just completed my SECA pre, I think Quickie has also.
    Sometime in the future I need to talk to you about this. But I think I need to build something simpler first.
  • Marra49Marra49
    Just had an offer of a 15% discount on one of those nice cases so I've ordered one ready for getting a board from Col.
  • AntiCrapAntiCrap
    Today I am of to The PCB printer to collect the iss2 PCB.  I can't wait to burn fingers on soldering iron again. Not a pencil this time Alan showing you how to arc welding this time.
  • uglymusicuglymusic
    I need an arc welder to make it? That sounds more fun than a soldering iron  :D  :o  :love:
  • AntiCrapAntiCrap
    Conductive chewing gum maybe.
  • uglymusicuglymusic
    Conductive? Is that conducive?
  • AntiCrapAntiCrap
    Spearmint flavour 
  • uglymusicuglymusic
    I prefer peppermint, if I'm given the choice.
  • AntiCrapAntiCrap
    edited May 13
    The New iss2 PCB's are here, added bits, Mono Bridge 80W, Balance Mono 80W, Stereo 30W, or SECA 8W, or mixed SECA A/B Stereo. Bridge Balance SECA 16W (gets hot)
    At this moment only 10 PCB,s Available. 
    Quickie will have his next week, is that OK Paul?

    I have made the PCB 5mm wider and much easier to mount transistors and FET, more room for larger transformer 80VA now 120VA, caps 10,000uF for A/B up to 47,000uF for mixed.
    Chassis from Amazon and I believe Paul has found another supplier, tell us Paul please.

    PCB now all leaded except 3W sense resistor and Zobel resistor these are 10R 2 of for Zobel 2512 SMD and 0.33R 2512 SMD for sense up to 6 of.
    Have fun please enjoy you work.
  • uglymusicuglymusic
    Great!

    But, I have to admit a lot of this is gobbledegook for me, Col  :/ .But sometime, soon I'll get to engage with it properly.
  • AntiCrapAntiCrap
    Pi lingo is harder honest 
  • uglymusicuglymusic
    Nah!
Sign In or Register to comment.