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Old 30th January 2013, 02:03 AM   #1201
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hehe e-bay have alot of .......
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Old 30th January 2013, 04:29 AM   #1202
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Location: Texas
Default is a 117 a new transistor?

I tried to put a bigger pic up and it wouldn't let me do it,,,,,I did what I could get up there ,The copper is showing on spencers ,
If you shrink the pic, it's a little bit better,I'll see if I can get a better pic to upload,the 2 on the right don't show copper but they checked/worked ok,so what do I know,lol.
Yea Buzz lots on ebay,I have bought real ones there too!
Thanks,
NS
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Old 30th January 2013, 05:05 AM   #1203
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Default I was looking for 2sk170 and bj74's but thanks,Those are close 300mw instead of 400 m

Quote:
Originally Posted by buzzforb View Post
On eBay, there are multiple sellers offering 2sk117gr with Idss of 14mA
Those are close 300mW instead of 400 mW what P comp goes with them?
NS
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Old 30th January 2013, 09:07 AM   #1204
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by AudioSan View Post
+/-32V rails give you about 29V P-P on the output.
29*29/4ohm=210W peak or 105W Rms.

for class A power:
3.6A*2=7.2A peak.
7.2*7.2*4ohm=207W peak or 103W Rms.
This is still wrong.
Audiosan wake up and read what you wrote.
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Old 30th January 2013, 12:00 PM   #1205
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andrew. you do see it is for 4ohm and not 8ohm?
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Old 31st January 2013, 12:17 PM   #1206
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and there we have it.
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Old 31st January 2013, 07:24 PM   #1207
BigE is offline BigE  Canada
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I thought two things:

1) 29 V P-P should just read 29V peak.
2) 7.2 ought to be 7.25, but that's picky.
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Old 31st January 2013, 07:38 PM   #1208
Renron is offline Renron  United States
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Quote:
Originally Posted by AudioSan View Post
and there we have it.
Sleeping dogs comes to mind.
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"If it doesn't work properly, hope it catches on fire"- Nelson Pass @ BA3
"I fired up the prototype. Literally." The Prophet Pass.
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Old 1st February 2013, 12:06 AM   #1209
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Quote:
Originally Posted by BigE View Post
I thought two things:

1) 29 V P-P should just read 29V peak.
2) 7.2 ought to be 7.25, but that's picky.
29V peak to peak. (P-P)
if i understand it correct.
29*29/4/2=105.125W
or
29*0.707=20.5V RMS
20.5*20.5/4=105.093W

marginal difference

3.6A bias give us:
7.2*7.2*4/2=103.68W
or
7.2*0.707=5.09A
5.09*5.09*4=103.6W
correct me if i'm off. but explain it. (don't do a Andrew)
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Old 1st February 2013, 05:14 AM   #1210
kroyin is offline kroyin  India
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I completed 1 monoblock of the V2 turbo.

Bias (with output open, input shorted) is 360 mV and 8 mV offset.

I have one observation though

--When i plug in the DCB1 preamp (-1.2 mV offset), even with the preamp off i get a offset of -80mV from F5T. Goes back to 8mV when i unplug the input.

My Aleph J does'nt do that , with or without the preamp connected it gives me 25 mV offset.
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