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#1
Posted to rec.audio.tubes
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Question about OT Headroom
https://taweber.powweb.com/store/kits_60b.htm#6M45H
WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. TIA, Joe |
#2
Posted to rec.audio.tubes
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Question about OT Headroom
"Joseph Meditz" wrote in message ups.com... https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. TIA, Joe These are clearly made for a guitar amplifier. Low headroom means the transformer core will start to saturate, and add harmonic distortion to the signal, when a lower signal voltage is applied compared with the other model. This could be desirable in a guitar amplifier. Early saturation is related to the magnetic flux density in the transformer core. When a voltage is applied to the primary of a transformer, the magnetic flux density in the core, and therefore the secondary voltage will change proportionally until the saturation point is hit, and after that, there is a non-linear relationship (harmonic distortion is produced because the signal has entered this non-linar region of operation) This basically means that the high headroom model will have either more (or bigger), or better quality laminations, as there is a limit to how much magnetic flux density a certain cross sectional area of 'iron' can handle. The above is also the reason why good tube amplifiers tend to be heavy. |
#3
Posted to rec.audio.tubes
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Question about OT Headroom
Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Ah ! A guitar amp. Turns ratio I'd guess. One will give higher peaks ( probably best for lead ) but the other will deliver solid consistent power ( probably best for bass ). Graham |
#4
Posted to rec.audio.tubes
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Question about OT Headroom
Joseph Meditz wrote:
https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Basically, if you choose "low headroom" you're getting a smaller, cheaper, output transformer for the same money (sneaky, huh?). I would go for the bigger iron in all cases, there's other, better, ways to get distortion.. history bears my point out. Few people are trading Super Reverbs for Pro Reverbs, Deluxes for Princetons, JCM 900 for JCM 800, or, overall, sticking smaller transformers in place of larger ones very often. That's not to say that there aren't good, small transformers, but for even money, IMHO, go for the bigger iron. -- Ned Carlson SW side of Chicago, USA www.tubezone.net |
#5
Posted to rec.audio.tubes
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Question about OT Headroom
Ned Carlson wrote: Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Basically, if you choose "low headroom" you're getting a smaller, cheaper, output transformer for the same money (sneaky, huh?). Thanks. That's what I suspected. But since their weights were not listed it was just a guess on my part, not to mention that I don't know the first thing about transformer design. I would go for the bigger iron in all cases, there's other, better, ways to get distortion.. history bears my point out. Few people are trading Super Reverbs for Pro Reverbs, Deluxes for Princetons, JCM 900 for JCM 800, or, overall, sticking smaller transformers in place of larger ones very often. That's not to say that there aren't good, small transformers, but for even money, IMHO, go for the bigger iron. Good advice. Joe -- Ned Carlson SW side of Chicago, USA www.tubezone.net |
#6
Posted to rec.audio.tubes
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Question about OT Headroom
Ned Carlson wrote: Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Basically, if you choose "low headroom" you're getting a smaller, cheaper, output transformer for the same money (sneaky, huh?). Thanks. That's what I suspected. But since their weights were not listed it was just a guess on my part, not to mention that I don't know the first thing about transformer design. I would go for the bigger iron in all cases, there's other, better, ways to get distortion.. history bears my point out. Few people are trading Super Reverbs for Pro Reverbs, Deluxes for Princetons, JCM 900 for JCM 800, or, overall, sticking smaller transformers in place of larger ones very often. That's not to say that there aren't good, small transformers, but for even money, IMHO, go for the bigger iron. Good advice. Joe -- Ned Carlson SW side of Chicago, USA www.tubezone.net |
#7
Posted to rec.audio.tubes
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Question about OT Headroom
Joseph Meditz wrote: Ned Carlson wrote: Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Basically, if you choose "low headroom" you're getting a smaller, cheaper, output transformer for the same money (sneaky, huh?). Thanks. That's what I suspected. But since their weights were not listed it was just a guess on my part, not to mention that I don't know the first thing about transformer design. The information supplied above may be entirely wrong however ! Why not simply ask the vendor ? Graham |
#8
Posted to rec.audio.tubes
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Question about OT Headroom
Eeyore wrote: Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Ah ! A guitar amp. Turns ratio I'd guess. No. Joe One will give higher peaks ( probably best for lead ) but the other will deliver solid consistent power ( probably best for bass ). Graham |
#9
Posted to rec.audio.tubes
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Question about OT Headroom
Joseph Meditz wrote: Eeyore wrote: Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Ah ! A guitar amp. Turns ratio I'd guess. No. You *know* it isn't ? Graham |
#10
Posted to rec.audio.tubes
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Question about OT Headroom
Eeyore wrote: Joseph Meditz wrote: Eeyore wrote: Joseph Meditz wrote: https://taweber.powweb.com/store/kits_60b.htm#6M45H WOT45HHR Higher Headroom, punchy, dynamic WOT45LHR Lower Headroom, balsy overdrive This kit has two options for the OT as described above, copied verbatim. The OTs are both rated for 45W and have the same impedances. I'm curious as to what in the design would account for the difference in headroom. Ah ! A guitar amp. Turns ratio I'd guess. No. You *know* it isn't ? Why do you doubt it? Graham |
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