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.
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.
naah
no benefit (all drawbacks) and too complicated
even for my level of insanity
(had experience with big tube rectifiers , in cinema (Xenon))
no benefit (all drawbacks) and too complicated
even for my level of insanity
(had experience with big tube rectifiers , in cinema (Xenon))
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? 😉
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 🙂
Info Hammond Chokes:
156B: 1,5mH RDC=0,07ohm DC-Current max=5A
159ZJ: 10mH RDC=0,16ohm DC-Current max=5A
There is also 155B at 6mH but only max current 2A (RDC=0,3ohm)
Bias in my F2 "Light" is 2A.
https://www.hammfg.com/electronics/transformers/choke/153-159
more the merrier
go for 10mH
considering C as 22mF , go for CLCC
hopefully that for one channel , so you'll need two chokes
go for 10mH
considering C as 22mF , go for CLCC
hopefully that for one channel , so you'll need two chokes
Yes, similar to drawing, one CLCC for each channel (each C=22mF) so need two chokes.
Have to look for positon in case for chokes.... Those 10mH are BIG..... 🙂
Have also read about LC but to many drawbacks for me.
Is there maybe also other manufacturers then Hammond for PSU chokes?
Have to look for positon in case for chokes.... Those 10mH are BIG..... 🙂
Have also read about LC but to many drawbacks for me.
Is there maybe also other manufacturers then Hammond for PSU chokes?
not for my knowledge , but I'm dumpster diver , so my experience doesn't count
you certainly have some local manufacturer , just search
each factory making ballasts for neon-ish bulbs is capable to make them
you certainly have some local manufacturer , just search
each factory making ballasts for neon-ish bulbs is capable to make them
Dumpster diving saves money and rain forest! 😉
Dumpster at work only have these big chokes.....:
Need bigger house.... 🙂
Dumpster at work only have these big chokes.....:
Need bigger house.... 🙂
Another possibility that worked great for me is to use a 24V SMPS. I got away with a lot smaller caps and inductors in the post SMPS CLC. The amps became small enough that I could cram in 4 amps in one box instead of 2 =)
But the main reason I did it was because I have issues with DC on my mains so the transformer hummed and I wanted to avoid building a mains circuit.
But the main reason I did it was because I have issues with DC on my mains so the transformer hummed and I wanted to avoid building a mains circuit.
Nice OllBoll! 🙂 Thanks for responce! SMPS dont take so much space. Never tried SMPS, but since I already have linear I will try to figure out to get rid of the little hum that is left.
Luckily I dont have DC issues.
Luckily I dont have DC issues.
I've used 6hy chokes from triade in some tube builds successfully when the schematic called for 10hy. C-14X
triade magnetics chokes Triad Magnetics Inductors | Mouser
Ok! But in transistor amp current is much higher and voltage much lower than in tube amp, so chokes must have much lower DCR. The chokes then get really big end expensive.
Mounted today CRCC with R=0,25ohm (2x0,5ohm 10w in parallell). Much more silent now! 🙂 Have space in amp for 10mH Hammond chokes but must then rearange everything inside....