Why dual TL over single(like f4/ba2 output). Better control. Perhaps stupid question. Why would TL outperform ccs loaded LED?
IMHO, the challenge will be to operate Conceptual F6 and its variants in Class A/B or even Class B modes and still make great sounding amps. I'll do it when the diy PCB by Mr. Pass becomes available for sale.Since my amplifier power needs are happily satisfied with less than 25W, I have no real interest in spending (wasting) time of Class-AB circuits.
Antoinel, just about every major amp manufacturer i know of tries to maintain class A as much as heat allows. There is really no doubt it improves performance. A/b is perfectly viable above low power levels, but you can keep it for anything else, IMO.
Please count me in for PCB, parts and semis to assemble Conceptual F6 as you make them available..
dual vs. single because you need two bias nets
TL will not outperform LED,diode or zenner based bias net
in fact , appropriate tempco will win stability wise but soundwise there will not be difference
Buzzforb Mentioned something..
Sorry for taken the first post and quote on, but.....
looks like it can use a pulse transformer buti would suspect a ratio 1:10:10 -> 1:100:100???
Am i right???
pulse xformer is certainly not adequate
those are for switching duties
whatever - define - are you asking about 1:10 , or about 1:100 xformers ?
those are for switching duties
whatever - define - are you asking about 1:10 , or about 1:100 xformers ?
Thats the ration of the transformer. This would give you system gain.
But you are correct. And the transformer will never be saturated....
go back and read what lhquam wrote about OLG amount
whatever Rs value you choose ( so amount of OLG ) , with 1:10 xformer that goes by factor 10
to keep amp in normal gain range (say 1V5 for full out ) , amount of feedback must rise , for my liking too much
whatever Rs value you choose ( so amount of OLG ) , with 1:10 xformer that goes by factor 10
to keep amp in normal gain range (say 1V5 for full out ) , amount of feedback must rise , for my liking too much
I was looking for a low part count approach. Perhaps batteries are the solution for that.😀
what's wrong with plenty of parts ........ just look at my Lightning version - 18 LEDs per channel
Perhaps different design goals, but Nelson seems to try to get away with as little gain and feedback as possible. I believe using the semi south in one amp, he stated that with the added linearity achieved from the part, he reduced gain and feedback giving back some of the performance gains as a result. He truly believes in as simple and minimalistic as possible, but no less.
please direct me to the Lightning version. Thank you.what's wrong with plenty of parts ........ just look at my Lightning version - 18 LEDs per channel
Why are SMPS transformer ferrite cores like that one about
ferrite core transformer - Detailed info for ferrite core transformer,ferrite core transformer,ferrite core transformer,EE/EI on Alibaba.com
are not suited for linear audio driver transformer?
Which special core requirements are necessary for best results in an application like the F6?
Concerning output transformers in tube amps there are several design rules like follow:
http://www.geofex.com/article_folders/xformer_des/xformer.htm
But the idle current values so as peak current values in transformers for fit power output stages are much more lower.
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You appear to be correct about that. Here is a Spice simulation of the two. The plot shows the ripple rejection of the two approaches. As you can see, the LED+CCS has a much lower corner frequency than the TL and is about 16dB better at frequencies about 100Hz.
dual vs. single because you need two bias nets
TL will not outperform LED,diode or zenner based bias net
in fact , appropriate tempco will win stability wise but soundwise there will not be difference
