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Old 30th January 2013, 11:14 PM   #8281
Joachim Gerhard is offline Joachim Gerhard  Germany
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Here is the Curtis Mc head and the recommendation to select the BC160 for noise.
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File Type: jpg Stan Curtis ETI MC Head.jpg (44.8 KB, 220 views)
File Type: jpg Stan Curtis MC head transistors.jpg (75.5 KB, 217 views)
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Old 31st January 2013, 06:03 PM   #8282
Joachim Gerhard is offline Joachim Gerhard  Germany
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I bought a nice collection of NOS Styroflex caps with low tolerance.
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Old 31st January 2013, 06:07 PM   #8283
Joachim Gerhard is offline Joachim Gerhard  Germany
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Harry F. Olson - Experiment That Saved Hi-Fi
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Old 31st January 2013, 06:44 PM   #8284
Salas is offline Salas  Greece
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Yes, basic things were confusing back then, but clear minded men always existed to think "hey that is a weird notion, lets look again into it"...radio days...when audio was king of entertainment.

Click the image to open in full size.
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Old 31st January 2013, 10:03 PM   #8285
Joachim Gerhard is offline Joachim Gerhard  Germany
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I think a tot of people, even today, like bandwidth limiting.
Some time ago i had a visitor, a guy maybe 20 years younger then me, working in real estate.
I sat him in the sweet spot of my system and played at what i would call medium volume.
After a short time he requested that i reduce the volume much and after some minutes more he remarked he had " enough". I call that " information overflow ".
It needs some experience to appreciate high end sound and some or even most will never get it.
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Old 31st January 2013, 10:04 PM   #8286
Joachim Gerhard is offline Joachim Gerhard  Germany
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Great picture Salas.
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Old 31st January 2013, 10:06 PM   #8287
Salas is offline Salas  Greece
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Its from Woody Allen's Radio Days.
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Old 31st January 2013, 10:18 PM   #8288
Joachim Gerhard is offline Joachim Gerhard  Germany
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This is interesting :http://www.diyaudio.com/forums/parts...ansistors.html
I did not know that the capacitance between collector and base can simply be measured with a meter. The thread also talks about differences of the same transistors from different brands.
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Old 31st January 2013, 10:21 PM   #8289
Salas is offline Salas  Greece
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Yes it can, I had done that to verify large Toshiba BJTs I got from random sellers against older trusty sourced ones.
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Old 31st January 2013, 10:30 PM   #8290
Salas is offline Salas  Greece
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P.S. Not any more informative than comparing for fakes at sow low Vceo a meter provides of course. Bit overblown but follows.
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