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ramtubes

Responses from ramtubes

Autoformers, The Benefits in matching amp to speaker
Ralph,I agree your amplifier is fine for the Maggies as the impedance is constant however the lowness of it is hard on the tubes. I look at low impedances are like driving a short. I did put a one ohm tap in the RM-200 and it will indeed output 10... 
Autoformers, The Benefits in matching amp to speaker
Much thanks for the information! Well I am certainly not literate in EE so a bit fuzzy on all of this but I did recently purchase some MC601 monos but have not heard them yet. Is your definition of the issue the same one as Mac has in their desi... 
MAC Autoformers?
I have started a new topic to explain how conventional output transformers differ from Autoformers. https://forum.audiogon.com/discussions/autoformers-the-benefits-in-matching-amp-to-speaker I also would like to note that the OP of this thread,... 
Autoformer vs Speaker impedance Curve
I have started a new topic to explain how conventional output transformers differ from Autoformers. https://forum.audiogon.com/discussions/autoformers-the-benefits-in-matching-amp-to-speaker 
MAC Autoformers?
Ralph,I did read your white paper before entering this discussion. Lets just agree to disagree. Peter Walker designed the 57 to be used with an amplifier with a damping of 20 and even specified the series inductance. To say that these speakers wil... 
MAC Autoformers?
A friend brought over a circulotron amplifier and we connected it to my Quad 63s I was immediately overhelmed with boomy one note bass. Knowing the Quads and most ESLs have high impedance in the bass I hooked up a generator to the amp and voltmete... 
Autoformer vs Speaker impedance Curve
I note that this discussion has many questions concerning the use of an autotransformer with high damping solid state (voltage paradigm) amplifiers. I would say there is little to gain and a lot to lose using one. Here's why. This does not apply t... 
Autoformer vs Speaker impedance Curve
I design and manufacture audio transformers for all Music Reference amplifiers. I also make OTL amplifiers with and without autotransformers which actually extend the frequency response in the high end. Here are a few things to note. An autotranfo... 
Amps and Preamps has standby, but should I turn them completely off?
Guitar amp power is usually measured at 5% THD. At low powers they can be quite clean. The older brown face Fenders were really clean. This was before Hendrix and the craze for overdrive, which is just another name for clipping/limiting, turning e... 
Amps and Preamps has standby, but should I turn them completely off?
The reason electrolytics need to be brought up slowly after a long sleep is because they will exhibit leakage current which multiplied by whatever voltage will produce some watts of heat. I dont think ESR is the main factor in caps exploding. It i... 
QUALITY AND SECURITY OF "LITTELFUSE" PRODUCTS
The reason tuning fuses are unsuitable for fusing tubes is quite simple. When a glass fuse blows in a DC circuit a plasma is formed in the glass cylinder. This plasma continues until the power supply has dumped all of its energy into that tiny fus...