ultralinear taps
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- Brown Sugar
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ultralinear taps
hey all! i am putting together an amp with an ultralinear/pentode switch and am still a little fuzzy on hooking up my ot to run in ultralinear.
i understand i put the ultralinear taps on the screens of the output tubes however i still have a 70v tap idk what to do with.
i did a search and i couldnt completely answer my own question. does any one have experience with the hammond 1645 ot or hooking up ultralinear/pentode switches?
thanks in advance!
-Brown Sugar
i understand i put the ultralinear taps on the screens of the output tubes however i still have a 70v tap idk what to do with.
i did a search and i couldnt completely answer my own question. does any one have experience with the hammond 1645 ot or hooking up ultralinear/pentode switches?
thanks in advance!
-Brown Sugar
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- demonufo
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Re: ultralinear taps
So I like purple, okay!!!!!!
83.7% of all statistics are made up on the spot!
83.7% of all statistics are made up on the spot!
- Brown Sugar
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Re: ultralinear taps
i apologize for such a noob question. i am starting out and trying to learn. gotta start somewhere.
-Brown Sugar
- Brown Sugar
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Re: ultralinear taps
man im an idiot. i figured it out. just dont know what the 70v tap on the secondary is for. help?
-Brown Sugar
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Re: ultralinear taps
I'm not 100% sure, but if I remember correctly, 70V is used mostly for PA systems, like in a school etc, where it's a long way from the amp to each of the speakers in the individual classrooms. Each speaker had to have it's own transformer to step the 70v signal down to a usable amount.
But I could be wrong. It's been a while....
But I could be wrong. It's been a while....
- axeman
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Re: ultralinear taps
Is that for me, or OP?axeman wrote:
- elronhoover
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Re: ultralinear taps
No, you got it right. Here's a link w/ some info:Wattever wrote:I'm not 100% sure, but if I remember correctly, 70V is used mostly for PA systems, like in a school etc, where it's a long way from the amp to each of the speakers in the individual classrooms. Each speaker had to have it's own transformer to step the 70v signal down to a usable amount.
But I could be wrong. It's been a while....
http://www.epanorama.net/documents/audio/70volt.html" onclick="window.open(this.href);return false;
For a guitar amp, you won't need to hook it up unless you're wiring it into a school speaker system ;^)
Just shrink wrap it and tie it off..
Dave
guess you only get one chance in life to play a song that goes like this.....
- Brown Sugar
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Re: ultralinear taps
thanks elronhoover and wattever. i had read about 70v taps being for PA systems and running many speakers but i wasnt sure about this OT. i really appreciate the help guys!
-Brown Sugar
-Brown Sugar
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- elronhoover
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Re: ultralinear taps
No problem, and don't worry about asking questions either, ask away IMO...
Dave
Dave
guess you only get one chance in life to play a song that goes like this.....
- Brown Sugar
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Re: ultralinear taps
Well then I have another question
I'm trying to switch between Pentode and Ultralinear operation in a 4xEl84 amp. I know that the UL taps connect to the screens for UL mode and the OT primaries connect to the plate for Pentode mode. I have a DPDT switch but I'm having trouble figuring out how to switch between the 2 modes and how to wire the DPDT switch. Could someone please point me in the right direction? I keep researching it online however I haven't been able to find the information I need for this specifically. Thanks!
-Brown Sugar
I'm trying to switch between Pentode and Ultralinear operation in a 4xEl84 amp. I know that the UL taps connect to the screens for UL mode and the OT primaries connect to the plate for Pentode mode. I have a DPDT switch but I'm having trouble figuring out how to switch between the 2 modes and how to wire the DPDT switch. Could someone please point me in the right direction? I keep researching it online however I haven't been able to find the information I need for this specifically. Thanks!
-Brown Sugar
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- elronhoover
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Re: ultralinear taps
Do you mean switch between pentode and triode operation?Brown Sugar wrote:Well then I have another question
I'm trying to switch between Pentode and Ultralinear operation in a 4xEl84 amp. I know that the UL taps connect to the screens for UL mode and the OT primaries connect to the plate for Pentode mode. I have a DPDT switch but I'm having trouble figuring out how to switch between the 2 modes and how to wire the DPDT switch. Could someone please point me in the right direction? I keep researching it online however I haven't been able to find the information I need for this specifically. Thanks!
-Brown Sugar
Ultralinear is pentode operation; with UL, the screens are supplied by dedicated screen taps off the OT pri instead of a node off the B+ rail as in non-UL operation. Are you maybe trying to switch between UL and non-UL (both pentode) operation? If so, you need to figure how to simultaneously open the OT's UL screen taps and switch in the B+ rail screen supply node. BTW, that's not something you want to do when the B+ is up..
Dave
guess you only get one chance in life to play a song that goes like this.....
- Brown Sugar
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Re: ultralinear taps
Yessir Im trying to switch between UL and non-UL. I also have a switch for pentode triode operation ill be putting in but that doesn't seem as daunting
-Brown Sugar
-Brown Sugar
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- elronhoover
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Re: ultralinear taps
Hey, well you were 100% correct with your UL vs. pentode nomenclature, and I was wrong (i.e. UL is 'quasi-pentode' so to speak), so apologies for that..
A quick search and I only saw UL/pentode switching for single-ended amps, but if you dig around I'm sure you'll come up with it.
Dave
A quick search and I only saw UL/pentode switching for single-ended amps, but if you dig around I'm sure you'll come up with it.
Dave
guess you only get one chance in life to play a song that goes like this.....