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#1
Posted to rec.audio.tubes
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Circlotron
I want to build this circlotron amplifier because this is much easier
for me to handle, especially I read enough posts about this amplifier from other discussion forum. http://www.audiodesignguide.com/Hybrid2011/index3.html Since this amplifier original approach is making an integrated amplifier and I want to build it as standalone amplifier because I have a preamp with 1V in 4V out. D3a has a plate resistance of 1.9K and gain of 70 (triode wired), and I am thinking about putting 300B instead for its low plate resistance 700 ohm, but the gain is sacrifice for only 3.85. As with the 300B, can I have less step down ratio through interstage transformer. Also, I consider put a step up input transformer to compensate the gain by using 300B. Any suggestion?? Thanks! |
#2
Posted to rec.audio.tubes
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Circlotron
On Thu, 15 Dec 2011 16:33:40 -0800 (PST), Fai C
wrote: I want to build this circlotron amplifier because this is much easier for me to handle, especially I read enough posts about this amplifier from other discussion forum. http://www.audiodesignguide.com/Hybrid2011/index3.html Since this amplifier original approach is making an integrated amplifier and I want to build it as standalone amplifier because I have a preamp with 1V in 4V out. D3a has a plate resistance of 1.9K and gain of 70 (triode wired), and I am thinking about putting 300B instead for its low plate resistance 700 ohm, but the gain is sacrifice for only 3.85. As with the 300B, can I have less step down ratio through interstage transformer. Also, I consider put a step up input transformer to compensate the gain by using 300B. Any suggestion?? Thanks! That seems like an awful lot of time, effort and danger to achieve what has to be one of the poorest amplifiers ever. What is the reasoning here? d |
#3
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Quote:
My zwei pfennig anyway, John |
#4
Posted to rec.audio.tubes
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Circlotron
On Dec 16, 8:33*am, Fai C wrote:
I want to build this circlotron amplifier because this is much easier for me to handle, especially I read enough posts about this amplifier from other discussion forum. http://www.audiodesignguide.com/Hybrid2011/index3.html Since this amplifier original approach is making an integrated amplifier and I want to build it as standalone amplifier because I have a preamp with 1V in 4V out. D3a has a plate resistance of 1.9K and gain of 70 (triode wired), and I am thinking about putting 300B instead for its low plate resistance 700 ohm, but the gain is sacrifice for only 3.85. As with the 300B, can I have less step down ratio through interstage transformer. Also, I consider put a step up input transformer to compensate the gain by using 300B. Any suggestion?? Thanks! Since the ciercuit has D3a there and wire in triode, it has plate resistance of 1.9K. Can I have less step down ratio interstage transformer if replacing tube with 1.265K? Let's say 3:1+1 or 2:1+1......? Thanks! |
#5
Posted to rec.audio.tubes
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Circlotron
There is nothing easy about the Circlotron, it's actually a
challenging project. It was mostly a workaround of the Unity Coupled Mcintosh patents. Since hese are long expired.... |
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