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Old 8th August 2018, 04:29 AM   #181
Extreme_Boky is offline Extreme_Boky
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Originally Posted by chromenuts View Post
Thatís even sillier than using Semisouth in the ACA
How's the sound?
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Old 8th August 2018, 12:55 PM   #182
plasnu is offline plasnu  United States
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What is the recommended extra 3 to 6dB gain stage for autoformer based 11dB gain amp for who needs 15dB/18dB gain?
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Old 8th August 2018, 01:24 PM   #183
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autoformer , what else
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Old 8th August 2018, 01:24 PM   #184
Dennis Hui is offline Dennis Hui  Canada
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Yeah...Iron-something...
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Old 8th August 2018, 01:52 PM   #185
plasnu is offline plasnu  United States
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Do you guys mean another autoformer gain stage?

input-buffer-autoformer(+6dB)-buffer-autoformer(+12dB)-VFET(follower)-output

Last edited by plasnu; 8th August 2018 at 02:00 PM.
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Old 8th August 2018, 02:43 PM   #186
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why not

never enough of good thing

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Old 8th August 2018, 03:45 PM   #187
plasnu is offline plasnu  United States
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If I choose to use an opamp as a buffer (like M2x), how about opamp as a 6 dB gain stage instead, or any other ideas?

A. input-opamp(buffer)-autoformer(+6dB)-opamp(buffer)-autoformer(+12dB)
B. input-opamp(+6dB)-autoformer(+12dB)
C. other?
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Old 8th August 2018, 04:37 PM   #188
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if you opt for OPamp , just make it with 6db gain and that's it
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Old 8th August 2018, 06:30 PM   #189
chromenuts is offline chromenuts  United States
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Originally Posted by Extreme_Boky View Post
How's the sound?
Donít want to get off this threads topic...short answer is I donít believe my system is optimized yet enough to make a judgement. My current drivers donít have the efficiency necessary to take full advantage of the ACA, nor have I tried a preamp with any gain...only DCB1.

When I get things sorted I will be making comparisons between the Semisouth and both Vishal/Harris IRFP240 for giggles. Thatís why I made sockets and remotely mounted the transistors.

Honestly, Iím not sure my old ears are capable of hearing a difference. It might be the same thing as asking someone what a new dish tastes like...Ētastes like chickenĒ.
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Old 8th August 2018, 07:53 PM   #190
plasnu is offline plasnu  United States
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if you opt for OPamp , just make it with 6db gain and that's it
Thanks!!
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