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#1
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
I'm trying to build a stand alone reverb unit like the first Fender
from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? |
#2
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
ralf wrote: I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? You need an Accutronics 4AB3C1B, or a 9AB3C1B if you'd like things a bit more lush. Give the "Folded Line" tank a miss - it's a piece of ****. Lord Valve Expert |
#3
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
"ralf" I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? ** Make sure all the tiny, tubular magnets are suspended freely when the tank is in its normal position. Otherwise, YOU have totally ****ed up your electronics. Got a scope ?? A DMM ? Anything ?? ........ Phil |
#4
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
It might not be a mis-match, instead what you are feeding into it may
be exactly what you are hearing, that is, a signal with a large hum content. If the reverb tranny you are using now has a low output impedance, just hook up a high efficiency speaker to it as a test to actually Hear what you are sending to the reverb tank. If that sounds hum-filled and weak then the problem is not the tank but instead your driver circuit. Conversely you can test your recovery circuit by playing the line output from a cd player into the recovery circuit. If that is weak and hum-filled then the problem is a bad recovery pre-amp. If both driver and recovery circuits produce good sound, then it Is the tank or impedance match, and go get the Accutronics tank like LV said. They are relatively inexpensive. ralf wrote: I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? |
#5
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
Lord Valve wrote: ralf wrote: I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? You need an Accutronics 4AB3C1B, or a 9AB3C1B if you'd like things a bit more lush. Give the "Folded Line" tank a miss - it's a piece of ****. Lord Valve Expert You lost, Willie. GET OVER IT! --E |
#6
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
On 8 Nov 2006 08:36:14 -0800, "RickH"
wrote: It might not be a mis-match, instead what you are feeding into it may be exactly what you are hearing, that is, a signal with a large hum content. If the reverb tranny you are using now has a low output impedance, just hook up a high efficiency speaker to it as a test to actually Hear what you are sending to the reverb tank. If that sounds hum-filled and weak then the problem is not the tank but instead your driver circuit. Conversely you can test your recovery circuit by playing the line output from a cd player into the recovery circuit. If that is weak and hum-filled then the problem is a bad recovery pre-amp. If both driver and recovery circuits produce good sound, then it Is the tank or impedance match, and go get the Accutronics tank like LV said. They are relatively inexpensive. thanks all, I will put my best man on this. ralf wrote: I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? |
#7
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
ralf wrote: I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? I once designed and built a suitable reverb unit that went into a Marshall 100W head, with the spring tank mounted away from the power tranny end of the box to keep the hum low. It had a paralleled 12AT7 with small ex radio 5k to 8 OPT to drive the input end of the springs, then a paralleled 12AX7 acting as a normal gain tube to amplifiy the output end of the spring unit which has a similar output to a moving magnet phono cartridge, ie, a few mV. The actual tranny I used was a 5W line matching tranny for 5k to 4,8&16 ohms, and ungapped, but with only 7mA of dc a gap wasn't needed, and the tranny cost less than $10 at our Dick Smith Elecronics store, like Radio Shack in the US. When mixed with the signal path before the master gain control it made the music like it was coming from a mile along a tunnel when turned up full and when used properly had the splendid warming effect on the instrumental tone; a little bit of reverb goes a long way. A Fender schematic I saw in the Groove Tube book unit used a 6V6 as the exciting tube to work into OPT to cause magnetic vibration mechanically of the springs which retain the music tones for a long time. But EL84, or other triode tubes are OK, except 12AX7 or other high Ra low gm tubes. I would think that straight springs that are unfolded would be best, and the makers don't need to be the Milton Twins, who know about organs, and in perfect weather. Patrick Turner. |
#8
Posted to rec.audio.tubes
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matching reverb transformer to reverb tank?
On 8 Nov 2006 22:52:15 -0800, "Ether" wrote:
Lord Valve wrote: ralf wrote: I'm trying to build a stand alone reverb unit like the first Fender from spare parts. I used the Fender circuit with the standard Fender reverb transformer but the only tank I have is a Folded Line from an old organ which says: "made in Milton, Wis. by beautiful girls in controlled atmosphere conditions". It has low, distorted output with some hum. Everything looks good going into the tank which seems mechanically ok. Any ideas? You need an Accutronics 4AB3C1B, or a 9AB3C1B if you'd like things a bit more lush. Give the "Folded Line" tank a miss - it's a piece of ****. Lord Valve Expert You lost, Willie. GET OVER IT! --E BWA HA HA HA HA HA HA HA HA !!!!!!!! **** you Lard Valve!! BWA HA HA HA HA HA HA HA HA !!!!!!!! **** you and **** your god!!!!!! BWA HA HA HA HA HA HA HA HA !!!!!!!! |
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