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Old 19th August 2015, 10:31 AM   #521
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Dear Mr. Pass, Zen Mod and fellow DIYers,

I suspect some (most?) of the fine sonic attributes of tube amps come from the use of tube rectifiers...if only we could use them for SS amps...
Has anybody knowledgeable played with Thyratrons?

Thyratron Rectifiers

Thanks,
M.
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Old 19th August 2015, 11:11 AM   #522
Zen Mod is offline Zen Mod  Serbia
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naah

no benefit (all drawbacks) and too complicated

even for my level of insanity

(had experience with big tube rectifiers , in cinema (Xenon))
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Old 19th August 2015, 01:17 PM   #523
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OK. Thanks. That saves me a lot of study.

Another clever trick that I've used, both in low power and high power circuits, is -ECdesigns'- stteped rectifier.
Diodes and R values can be upgraded/increased to meet desired power ratings.

Cheers,
M.
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Old 19th August 2015, 07:37 PM   #524
oks81 is offline oks81  Norway
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Quote:
Originally Posted by Zen Mod View Post
I believe answer is somewhere in article
Output impedance for my F2:
Reading, reading, reading
Found in articles:

Zen Amp: 1ohm
Zen Lightenment: 1ohm
Zen Variation 2: 1ohm
Zen Variation 8: a little less than 8ohm.
Original First Watt F2 without R13,14,15: 700ohm

On page 15, post #141 in this thread i find that output impedance for my F2 should be "big R" in parallel with output resistors R13,14,15.

I`m only using R13, and big R is 5ohm so finding output impedance=4,5ohm ?
Is this correct teacher Zen?
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Old 19th August 2015, 09:07 PM   #525
Zen Mod is offline Zen Mod  Serbia
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it's here , top of page 7 :
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Old 19th August 2015, 09:27 PM   #526
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Quote:
Originally Posted by oks81 View Post
Output impedance for my F2:
Reading, reading, reading
Found in articles:

On page 15, post #141 in this thread i find that output impedance for my F2 should be "big R" in parallel with output resistors R13,14,15.

I`m only using R13, and big R is 5ohm so finding output impedance=4,5ohm ?
Is this correct teacher Zen?

Yes, that is correct. When big R and R13 is in parallel you find the total resitance, Rtot, with this equation (I saw in a previous post that you used 47 Ohms for R13):

Rtot = 1/((1/BigR) + (1/R13)

Rtot = 1/((1/5) + (1/47) = 4.519 ohms


I hope it is ok that I reply, even thought I am not master Zen :-)
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Old 19th August 2015, 10:24 PM   #527
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Old 20th August 2015, 05:56 AM   #528
oks81 is offline oks81  Norway
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Thanks a lot to both!

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