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Thread: Valve Wizard MM valve PCB build

  1. #1
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,863
    I'm Oliver.

    Default Valve Wizard MM valve PCB build

    Hi all,

    I recently decided that being mentally deficient in regard to electronics was really starting to get on my Tits.

    I bought a phonostage which had many documented mods and set about changing a few bits but it really didn't "educate" me, rather just refined my ability to solder (and desolder)

    After some research it seemed the logical choice was to build something easy. I bought a DC filtering PCB and built that. Very good, all works and I now know what a diode is. Again I felt I needed more.

    I decided a MM phonostage would probably be beneficial In a number of ways. So a long search of the internet brought me to

    theValveWizard.co.uk.

    I bought a MM PCB and got a very easy to follow component flow chart and an instruction PDF. An abunce of emails between Alan and myself followed and eventually I started to order some parts.

    I won't bore with the details but it's going to have two PCC88 valves and a single ECC83. All the square capacitors are Polypropylene and all but two resistors are metal film. Ceramic valve holders and I used silver solder because I had it left over.

    I now have a suitable donor case (Thanks Phonomac!) case to put the board and power supply in and a very nice transformer for which I still have to pay Alan 🤣

    Here's the pics of the board in its current state

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken & Tesla Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 & Monarchy Audio SM-70 Class A Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,272
    I'm Alan.

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    Can I nitpick already?

    Looks like C11 is a 5% tolerance whereas the blue capacitors fitted in C1 position are the 1% caps I gave you for C11 position I think.

    It's a good looking pcb.


  3. #3
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,863
    I'm Oliver.

    Default

    Quote Originally Posted by Firebottle View Post
    Can I nitpick already?

    Looks like C11 is a 5% tolerance whereas the blue capacitors fitted in C1 position are the 1% caps I gave you for C11 position I think.

    It's a good looking pcb.

    You can!

    Doh! A Mistake already.

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken & Tesla Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 & Monarchy Audio SM-70 Class A Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  4. #4
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    Good to see you having a go Oliver.

    A diode was the first component I learned about, along with a variable capacitor and coil when I built a crystral set radio at about the age of eight. Dad was an electronics 'wiz', so I started early.

    Have you looked at a diode rectifier? It still tickles me that it's such an elegant and simple idea.

    You'll have to figure out a triode now!

  5. #5
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,863
    I'm Oliver.

    Default

    Quote Originally Posted by walpurgis View Post
    Good to see you having a go Oliver.

    A diode was the first component I learned about, along with a variable capacitor and coil when I built a crystral set radio at about the age of eight. Dad was an electronics 'wiz', so I started early.

    Have you looked at a diode rectifier? It still tickles me that it's such an elegant and simple idea.

    You'll have to figure out a triode now!
    Cheers Geoff, my old man was a plumber and worked on the railway. I learned electrical installation and now work on the Railway lol. I can rewire your house, fit you a bathroom or manage the customer information of a fleet of 104 rolling stock (train sets) during disruption, but soldering a Valve holder onto a PCB was another matter lol.

    Onwards to knowledge!

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken & Tesla Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 & Monarchy Audio SM-70 Class A Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  6. #6
    Join Date: Aug 2008

    Location: Suffolk, UK

    Posts: 1,250
    I'm Paul.

    Default

    Really curious to see how this turns out.
    ~Paul~

  7. #7
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    Quote Originally Posted by Bigman80 View Post
    Cheers Geoff, my old man was a plumber
    Ah. So you understand a tap then, A triode is the electrical equivalent, the grid doing the job of a tap washer!

  8. #8
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,863
    I'm Oliver.

    Default

    Quote Originally Posted by walpurgis View Post
    Ah. So you understand a tap then, A triode is the electrical equivalent, the grid doing the job of a tap washer!
    Indeed. It was a breakthrough when I understood Ohms Law. Alan tried to explain it but it didn't sink in, a YouTube video however cemented in my brain. Gotta love YouTube!

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken & Tesla Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 & Monarchy Audio SM-70 Class A Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  9. #9
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    Building speakers can be fun too. I've made loads. The options are limitless.

  10. #10
    Join Date: Mar 2008

    Location: Dunfermline, Scotland, UK

    Posts: 12,392
    I'm inthescottishmafia.

    Default

    Looks good Oli, soldering looks tidy.
    “Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”

    Hunter S Thompson

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