Adding a bias meter to Zenlite

[Michael Rothacher]

Would inserting a DC Ammeter in series with one of the bulbs be really bad for my musical mojo? I'd like to add a simple meter to my Zenlite.

Not a necessarily a watt/power meter - and yes, I realise it is a constant current design so monitoring current will be a little boring as the meter won't actually move. But I'd like to hear your ideas just the same. I've seen watt meters that use a rectifier at the output - why is this bad? I've seen the boos, hisses, and screeds, but never really got a good sense for why.

I think a meter would add that last little bit of muahahaha!

Thanks

Mike


/mike - listening to laurie anderson, big science for inspration

 

[Nelson Pass]

That's spelled MuuuHahahaha

Adding some resistance (or a meter) in series with the
light bulb won't hurt a thing. You can also place a
meter across the Mosfet (with some resistance in series).

Don't forget the blue light.


pass/ - the original light was green, but Germans demanded
blue

 

[carpenter]

meter?

How about adding a meter to the faceplate to measure dc offset? I'm always curious about mine. Since it's 4 or more volts out when cold, it would move as the amp heated up.....

If it were to move to far off center (likely when the room is hotter) I'd know that something's amiss.

John

 

[moe29]

so we have the Germans to thank for the
cool blue?! 🙂

 

[Nelson Pass]

so we have the Germans to thank for the
cool blue?! 🙂

Yeah. They wanted the amps to match their Wadias.

pass/ - likes blue anyway.

 

[Michael Rothacher]

Spelling MuuuHahahaha

Airfare to Vegas: $180.00
Losing at the slot machines: $100.00
Hot dog at CES concession: $ 5.00

Finally getting Nelson Pass's autograph - priceless!

Thanks Nelson, and the spelling indeed appears to be correct!

/mike - has Ray Bradbury's autograph, Richard Feynman, now Pass...Life is good.

 

[moe29]

Mike,
That is a classic autograph!

...i was trying to figure out what was signed...
is that the X patent? or XA product lit?



moe29
--------------------
playing sad music today,
R.I.P. hero astronauts.
-------------------------------

 

[Michael Rothacher]

It's the "Like Peanut Butter And Chocolate" white paper for the XA series amps & Nelson's business card. He also signed a copy of the 11/91 Stereophile. This was the issue where he was interviewed by Tom Norton and first eluded to his interest in single-ended solid state designs. He was a real gentleman, and even pronounced Muuhahahaha for my wife - in mad scientist fashion!


/mike - likes peanut butter, chocolate, and blue lights.

 

[Karen]

Mike, have you considered a meter to track the output? Could be very Muuuhahahahaha! (more movement, also)

 

[Michael Rothacher]

Karen:

Yes, I thought about this kind of arrangement, but I don't know if having this circuit across the output will be bad for my Feng Shui. What do you think?

Thanks

Mike

 

[Michael Rothacher]

Sorry, forgot the schematic... The meter would be a 20 mA full-scale type. With blue light of course...

 

[cyclotronguy]

Cyclotronguy likes the blue too. Cherenkov radiation a visual sonic boom!

Muuuhahahahaha (must be contagious)

Cyclotronguy

__________
cos(a) = vlight/v, thank you Pavel