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Re: Teac 4010SU R2R
Caps for the EQ/pre amp and amplifier board expected tomorrow. Small values, a whole $22 with some extras ordered, including shipping. What else to do?
The RG Keen PNP Germanium transistor tester. The guitar crowd loves Ge transistors for their fuzz face clones. I guess you could call it a tube type PNP. It measures leakage, flip the switch and you get gain. Ge PNP are touchy. Heat from your fingers changes value so you have to leave them stabilize for a couple minutes. I used a switch for gain instead of push button.
Next Mouser/Digi order I'll get some exact value resistors, maybe even a zif socket. For now, I got 2.2M and 2.47k values with my add-a-resistor-in-series-to-get-value setup.
A Toshiba 2SA49. My amp board has two of each. Toshiba 2SA49, 2SB94, 2SB440. One 2SB415. Two TEN brand 2SB39. Two Sanyo 2SB405.
Some folks say these $20 TC1 testers net results as good but IMO, the Keen method provides more accurate real-time results. The neat thing about this tester is just stick any leg in a different number on zif socket and it sorts out E/B/C.
The RG Keen PNP Germanium transistor tester. The guitar crowd loves Ge transistors for their fuzz face clones. I guess you could call it a tube type PNP. It measures leakage, flip the switch and you get gain. Ge PNP are touchy. Heat from your fingers changes value so you have to leave them stabilize for a couple minutes. I used a switch for gain instead of push button.
Next Mouser/Digi order I'll get some exact value resistors, maybe even a zif socket. For now, I got 2.2M and 2.47k values with my add-a-resistor-in-series-to-get-value setup.
A Toshiba 2SA49. My amp board has two of each. Toshiba 2SA49, 2SB94, 2SB440. One 2SB415. Two TEN brand 2SB39. Two Sanyo 2SB405.
Some folks say these $20 TC1 testers net results as good but IMO, the Keen method provides more accurate real-time results. The neat thing about this tester is just stick any leg in a different number on zif socket and it sorts out E/B/C.
SCompRacer
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