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Old 14th July 2004, 08:47 AM   #11
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To cunningham : MJ 802 was new in stone age - they are hopeless slow. How you can regard this excavations ?
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Old 14th July 2004, 12:47 PM   #12
K-amps is offline K-amps  United States
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Quote:
Originally posted by Upupa Epops
To cunningham : MJ 802 was new in stone age - they are hopeless slow. How you can regard this excavations ?

Same with the 2n3773. . ... and the 3055 for that matter but the 3055 sounds better than the 3773/802's IMHO.
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Old 14th July 2004, 12:49 PM   #13
K-amps is offline K-amps  United States
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Quote:
Originally posted by cunningham
2N3055 and MJ2955 are cheap though and are good to experiment with because if you blow one up then your only out a few dollars.

Some of the good high gain linear ones will set you back a bit more.
Expensive? Well I have several MJ21195/96's for $2.69 a piece How many do you want? (I sell complementary pairs only) If you get over 100 pairs you will get a good discount.
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Old 14th July 2004, 01:09 PM   #14
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Default Thanks for the input

Thanks guys. I really appreciate your input.
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Old 15th July 2004, 02:13 AM   #15
Jay is offline Jay  Indonesia
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Quote:
Originally posted by cunningham
2N3055 and MJ2955 are cheap though and are good to experiment with because if you blow one up then your only out a few dollars.
Unless you blow up your martin logan Many old amplifier designs using N3055 took the speaker with them when blown up.
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Old 15th July 2004, 02:19 AM   #16
sam9 is offline sam9  United States
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"Unless you blow up your martin logan Many old amplifier designs using N3055 took the speaker with them when blown up."

If one is really "exprimenting", I would hope they use a dummy load. Connecting to real speakers should come after doing some worst case tests with the dummy.
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Old 15th July 2004, 02:36 AM   #17
Jay is offline Jay  Indonesia
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Quote:
Originally posted by K-amps
Same with the 2n3773. . ... and the 3055 for that matter but the 3055 sounds better than the 3773/802's IMHO.
To not confuse anybody, I have never used the 2N3773 in class B.

Quote:
Originally posted by sam9
"Unless you blow up your martin logan Many old amplifier designs using N3055 took the speaker with them when blown up."

If one is really "exprimenting", I would hope they use a dummy load. Connecting to real speakers should come after doing some worst case tests with the dummy.
So I was not really experimenting Fortunately I have never owned a martin logan.
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Old 15th July 2004, 11:37 PM   #18
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Quote:
Originally posted by Upupa Epops
To cunningham : MJ 802 was new in stone age - they are hopeless slow. How you can regard this excavations ?

The OUTPUT stage only has to work at 20 Khz max for full range audio. and for HIGH current???
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Old 15th July 2004, 11:47 PM   #19
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Quote:
Originally posted by sam9
"Unless you blow up your martin logan Many old amplifier designs using N3055 took the speaker with them when blown up."

If one is really "experimenting", I would hope they use a dummy load. Connecting to real speakers should come after doing some worst case tests with the dummy.
And make sure the final dummy load, after testing with a resistive load, is something really hideous and reactive. Many amplifiers show all kinds of interesting artifacts with tough loads even though they pass resistive loads with flying colours. The Journal of the Audio Engineering Society had an excellent article about 30 years ago by some Crown engineers on that subject.


Francois.
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Old 16th July 2004, 12:56 AM   #20
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Quote:
Originally posted by Upupa Epops
MJ 802 was new in stone age - they are hopeless slow.
I am using MJ802 and MJ4502 of TO-3. Hopeless slow......
What is the practical problem in use for audio amplifiers???
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