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    Two Rock Mayer Preamp Pedal - Tube not heating

    With this being a genuine PreAmp, can it be used as a pedal into the front end of an amp, or do you feed it into the return of an amps effects loop?
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    Getting old...

    I'm lucky it's just in the last 18 months my eyes have stopped focusing quite as close as they uses to, thankfully it's not been a problem when reading or in everyday life, just SMD soldering and drilling small holes. I did learn quickly yesterday not to look around the room while wearing the...
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    Two Rock Mayer Preamp Pedal - Tube not heating

    That's great, hope it sounds good.
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    Getting old...

    I started drilling, gave up, got in the car and drove to a supermarket where I bought some reading glasses, came back and was able to see what I was drilling! I feel it is down hill from here :oops: As a side note, any etchers here?
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    Two Rock Mayer Preamp Pedal - Tube not heating

    Okay, it looks like you just need to disconnect pin 9 from pins 4&5 and connect pin 9 to ground, which is the solder tab next to the 6v output on the SMPS board.
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    Two Rock Mayer Preamp Pedal - Tube not heating

    Cool project by the way... Tempting :)
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    Two Rock Mayer Preamp Pedal - Tube not heating

    If I've understood you correctly 4, 5 and 9 are all connected together? If so this is wrong, your 6v to pins 4&5 is correct. Pin 9 will need to be connected to somewhere else, I'm guessing ground. But sometimes filament heaters come off a transformer winding with a center tap, and it's the...
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    Two Rock Mayer Preamp Pedal - Tube not heating

    You say you have 6V on the heater filaments, I just want to check that the 6v is between pins 4 and 9, in your diagram you only have a conection going to pin 9 there is nothing connected to pins 4&5, i.e. nothing to complete the circuit.
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    Your best method for removing thorugh-hole components from a PCB

    I find solder wick works much better if you have a tub of flux you can dip the end into before using it, even if the wick is already impregnated with flux.
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    CONTEST Name that board

    Too late I know :oops: In the UK we call them Fig Rolls, in the USA, Fig Newtons?
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    CONTEST BBDs Baby!

    They are all good, we need some optimism in this world.
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    CONTEST Name that board

    What gave it away?
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    CONTEST Name that board

    There are so many possibilities with this forum subsection, we could have: Rats nest of the week! It’s so beautiful I might just have to hang it on the wall ‘art' award. Can you tell where I went wrong? Guess what it is competition.
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    CONTEST Name that board

    I couldn’t help wanting you to add “Pudding" at the end of your “Bread & Butter” suggestion. Simple ingredients lead to wonderful tones… I mean desserts!
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    CONTEST Name that board

    "A baker's dozen" Because lets face it, nothing is what it seems ;)
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    Accurate pedalboard

    I really want a ghost trap pedal
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    Low gain fuzzes

    https://www.pedalpcb.com/product/titania2/ ;)
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    CONTEST Germania

    No confusion, I amended my post yesterday after I appreciated my base-8 initial calculations resulted in a scaling error of 10…. ...Yeah, okay I got confused, I admit it! :rolleyes:
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    CONTEST Germania

    Hold your horses, there is a deception a foot. 
 Mr. Fig states, and I quote the scoundrel directly, "I just finished testing and cataloguing a lot of 50 Germanium PNP MP21A" 
 But Sir! I count with my very eyes 51, this is clearly a deception of grave magnitude, but I clearly see the secret...
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    CONTEST Germania

    62hFE with a leakage of 0.197mA. But wait...
 
 I'd chosen to consult the akashic records for guidance on those numbers, but that does not tally with your message causing me to question the validity of the leakage value, all you say, all are under 0.120mA how can this be! Being stumped I feel...
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