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November 12, 2025, 03:59:00 PM

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Realistic MPA-100

Started by saturated, October 26, 2025, 09:49:38 PM

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g1

The cap has the 4 as a multiplier, not as a digit.  So 33 with 4 zeroes, in pF.
For the transistor sub, power and current & Hfe look ok but I don't think the Vceo of the TTC015B is sufficient.  I would look for the TTC004B.

saturated

Yes sir thanks also I think I learned 1H means 50 v DC  xP
I ask stupid questions
and make stupid mistakes

criticism, critique, derision, flaming, verbal abuse welcome

saturated

Ok
Got my transistors in yesterday so today didn't have a lot of time but hey onward we go

Anyhow wife gave me too much coffee so I had some hella jitters trying to get this in

Also I verified pinout etc

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And the ugly truth

Oh yeah that nut that was glued to the board and fell off added to the entertainment

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I did not have tons of confidence in this install so I checked for continuity but fingers crossed apparently no solder bridges

So now just waiting on my capaci-TATERS  :'(  :'(

I ask stupid questions
and make stupid mistakes

criticism, critique, derision, flaming, verbal abuse welcome

saturated

Too much fun

Just had a cow looking at the collector which appears to be touching the heatsink  :grr

Anyhow I did some more continuity tests and I think it's ok but yeah gonna have to pay attention to stuff like that

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I ask stupid questions
and make stupid mistakes

criticism, critique, derision, flaming, verbal abuse welcome