OP
The Muse I Adorn
- Thread starter RVA
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eSGEe
Ferengi Ambassador of Trade
I guess the "power level" knob is ACTUALLY an attenuator -- there is also a Volume AND a MASTER volume -----and a GAIN (really so many bleeding knobs!) I almost got my HAMMER--- but then I didnt -- and I set it on the VOX AC30 setting........with a tad of reverb -- and a touch of gain and LOVELY tones come out of it
eSGEe
Ferengi Ambassador of Trade
the power level to 30W thing truly is so "it goes to eleven" ish that you wonder if some bloke at vox is having a bit of a laugh--
we sell a VT20 (20 watt)
a VT 30 (30 watt)
a VT40 (40 watt)
lets make this one a VT20....er uhm...... PLUS yes PLUS -- with same crap as the 30 watt amp IN IT -- only an 8" speaker (cause we gotta get rid of too many we bought) --but CALL IT a 20+ ....sure why not-- those AMericans will buy ANYTHING!
we sell a VT20 (20 watt)
a VT 30 (30 watt)
a VT40 (40 watt)
lets make this one a VT20....er uhm...... PLUS yes PLUS -- with same crap as the 30 watt amp IN IT -- only an 8" speaker (cause we gotta get rid of too many we bought) --but CALL IT a 20+ ....sure why not-- those AMericans will buy ANYTHING!
chilipeppermaniac
Ambassador of Decibels
Correct yes-----however this is the VT20+---- Im sensing your inherent "lawyerly" bullspunk -o-meter is SCREAMING at you like a Spidey sense thing-------
proof
VT20+ note the "power control knob" ----goes to 30 watts,
Im only INSANE on tuesday and Friday
View attachment 21336
OMG in reading these posts in the last 45 seconds, I think I blew my 1A Brain Mains fuse.
chilipeppermaniac
Ambassador of Decibels
The Brit version?
chilipeppermaniac
Ambassador of Decibels
Now I will blow your Abbott and Costello minds.
Try on this Corona California switcheroo. This Hi LO switch takes Fender THE Twin amps from 100 to 25 watt capability. But I believe one must remove the right tube(s) to do so. Likely re-bias as well. DonP has one and if he reads this, he can clarify this 100% if he gets there before I refresh my memory and read the manual.
Try on this Corona California switcheroo. This Hi LO switch takes Fender THE Twin amps from 100 to 25 watt capability. But I believe one must remove the right tube(s) to do so. Likely re-bias as well. DonP has one and if he reads this, he can clarify this 100% if he gets there before I refresh my memory and read the manual.
chilipeppermaniac
Ambassador of Decibels
As I said and Adrian said it is too much work, "This Hi LO switch takes Fender THE Twin amps from 100 to 25 watt capability. But I believe one must remove the right tube(s) to do so. Likely re-bias as well."
I researched a bit more as I have often somehow found myself somehow with the amp in LO power but never took out any tubes. SO I found this on a Les Paul forum
"To answer the original question, on the Twin 100/25, Fender is dropping the HT voltage down by approximately half. They use a switch on the totem-poled main filter caps to select either the top cap positive or the bottom cap positive. They have wired the power transformer in a way to use the center tap or not."
I researched a bit more as I have often somehow found myself somehow with the amp in LO power but never took out any tubes. SO I found this on a Les Paul forum
"To answer the original question, on the Twin 100/25, Fender is dropping the HT voltage down by approximately half. They use a switch on the totem-poled main filter caps to select either the top cap positive or the bottom cap positive. They have wired the power transformer in a way to use the center tap or not."
chilipeppermaniac
Ambassador of Decibels
Now of course to add to my confusion I read this at the Fender Forum. I believe the OP and responders are going by a TWIN and not a "THE Twin" instructions. I read both and definitely see their quote about the LO power and pulling 2 tubes on the "TWIN" version. SO, I am not sure about the "THE TWIN"
Here's what the manual says:
"Low Power Option: The Fender TWIN amplifier can be run with only two output tubes instead of four. This is done by removing the two inner 6L6-GC tubes... and setting the IMPEDANCE SELECTOR switch to one-half of the total speaker load impedance... (Remember-- half the tubes, half the impedance.) This will produce 60 Watts R.M.S. in the HI power setting and 15 Watts R.M.S. in the LO power setting.
Also from the manual:
"The Fender Twin is supplied with two 8 ohm speakers connected in series therefore the total load impedance is 16 ohms..."
The problem is, if I remove the two tubes, and change the impedance selector from 16 to 8 ohms per the instructions, now I have an impedance mismatch, because the speaker impedance hasn't changed; it's still 16 ohms. I've always heard that the amp and speaker impedances should match.
I think the answer is this: yes, if the speaker and amp output impedances match, you get the maximum efficiency; the maximum transfer of power to the speakers. However, if the speaker impedance is more than the amp impedance, there will be a larger voltage drop across the speakers and less in the amp. Less efficient, less power transferred, but not harmful. However, if the amp impedance is higher than the speakers, that's bad, because more voltage will drop across the amp's output stage, and will cause it to overheat.
Could someone more knowledgeable tell me if that is correct?
Fender® Forums: View topic - Output impedance and Lo Power mode on Fender Twin
Twin Amp.
https://www.fmicassets.com/Damroot/Original/10001/OM_leg_gtramp_94_Twin_Amp.pdf
The Twin.
https://www.fmicassets.com/Damroot/Original/10001/OM_leg_gtramp_The_Twin.pdf
Here's what the manual says:
"Low Power Option: The Fender TWIN amplifier can be run with only two output tubes instead of four. This is done by removing the two inner 6L6-GC tubes... and setting the IMPEDANCE SELECTOR switch to one-half of the total speaker load impedance... (Remember-- half the tubes, half the impedance.) This will produce 60 Watts R.M.S. in the HI power setting and 15 Watts R.M.S. in the LO power setting.
Also from the manual:
"The Fender Twin is supplied with two 8 ohm speakers connected in series therefore the total load impedance is 16 ohms..."
The problem is, if I remove the two tubes, and change the impedance selector from 16 to 8 ohms per the instructions, now I have an impedance mismatch, because the speaker impedance hasn't changed; it's still 16 ohms. I've always heard that the amp and speaker impedances should match.
I think the answer is this: yes, if the speaker and amp output impedances match, you get the maximum efficiency; the maximum transfer of power to the speakers. However, if the speaker impedance is more than the amp impedance, there will be a larger voltage drop across the speakers and less in the amp. Less efficient, less power transferred, but not harmful. However, if the amp impedance is higher than the speakers, that's bad, because more voltage will drop across the amp's output stage, and will cause it to overheat.
Could someone more knowledgeable tell me if that is correct?
Fender® Forums: View topic - Output impedance and Lo Power mode on Fender Twin
Twin Amp.
https://www.fmicassets.com/Damroot/Original/10001/OM_leg_gtramp_94_Twin_Amp.pdf
The Twin.
https://www.fmicassets.com/Damroot/Original/10001/OM_leg_gtramp_The_Twin.pdf
chilipeppermaniac
Ambassador of Decibels
I just play it in Hi mode. If I want small wattage, I use my SS Fender Princeton Chorus.
chilipeppermaniac
Ambassador of Decibels
Very nice looking Jag, esgee
chilipeppermaniac
Ambassador of Decibels
Yay. What kinda single coils?///////
Here I knew you said anemic, then am sure I read humbuckers, but having anemic overpower my thinking got me typing Single coils, Ha!!!!
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