The Rude Tube
- Thread starter bernbrue
- Start date
Help Support GroupDIY Audio Forum:
bernbrue
Well-known member
The 4257 could work as input. Not shure. Give it a try. Otherwise take a cheap Edcor or any 1:1 or 2:1 for input/output.
regards
Bernd
regards
Bernd
jandoste
Well-known member
Hey Guys,
I got my PCBs and me happy
great job!
I think I need your help I can't find 100uH[L1] on the mouser website... and also Log 22K
last question is where can I find the cheaper E88cc?
Thanks for any advice...
cheers
I got my PCBs and me happy
great job!I think I need your help
I can't find 100uH[L1] on the mouser website... and also Log 22K last question is where can I find the cheaper E88cc?
Thanks for any advice...
cheers
bernbrue
Well-known member
Hi,
Drask is going to open up a "Rude Tube build and help thread". Please ask there for sourcing parts.
http://www.musikding.de/Passive-Bauteile/Transformatoren/Drosseln/Drossel-100uH-0-165A::3128.html
regards
Bernd
Drask is going to open up a "Rude Tube build and help thread". Please ask there for sourcing parts.
http://www.musikding.de/Passive-Bauteile/Transformatoren/Drosseln/Drossel-100uH-0-165A::3128.html
regards
Bernd
jandoste
Well-known member
Thanks Bernd
bernbrue said:
Hi,glbaudio said:my PCB is arrived today...
i see in the PSU board, on the Relay-Lamp 24V rail, C11 is an electrolitic 25V type (5 mm spacing)...are you sure is enough? with a 24V transformer the voltage in that point should be 33-34V...
Good.
Oh okay, maybe a error of me when I write the BOM.
You can put a 35v for to be sure. You can find with the same footprint.
I can't check before saturday. But I keep you inform
Jerome
bernbrue
Well-known member
Jerome,
would you please open a new thread for your Rude Tube pcbs. I would like to keep this thread clean for further developments and mods. So, fellows, don´t post BOM, questions etc. here.
regards
Bernd
would you please open a new thread for your Rude Tube pcbs. I would like to keep this thread clean for further developments and mods. So, fellows, don´t post BOM, questions etc. here.
regards
Bernd
bernbrue
Well-known member
updated the first post
regards
Bernd
regards
Bernd
bernbrue
Well-known member
Hi,
I need some help. I would like to implement two preamp outputs in my Rude Tube, one line out (transformer balanced) and another unbalanced output that can be connected directly to a poweramp/guitaramp. My question: can I simply send the unbalanced signal from the ECC88 to a guitaramp? I tried it once and found the output too hot for a guitaramp. Any advise?
regards
Bernd
I need some help. I would like to implement two preamp outputs in my Rude Tube, one line out (transformer balanced) and another unbalanced output that can be connected directly to a poweramp/guitaramp. My question: can I simply send the unbalanced signal from the ECC88 to a guitaramp? I tried it once and found the output too hot for a guitaramp. Any advise?
regards
Bernd
RATMNL
Well-known member
If you really want to be sure you could put an impedance-transformer-stage between the tube and the output, acting like a sort of re-amp box?
P.S. I don't know jack, but it sounded logical in my head.
M
P.S. I don't know jack, but it sounded logical in my head.
M
It is a little tricky in the rude tube arrangement to do an additional hi-Z output of a useful voltage level for a guitar amp.
Taking signal off the line amp tube output will cause loading effects for the balanced output for sure.
But it could be done using an attenuation network. I's just that the main output will be compromised.
You could also try taking off the line driver tube grid with a suitable attenuation network. You'll get some thing working
but again it will certainly compromise the performance of the line amp.
Another possibility is taking off from the cathode of the line amp tube with a suitable network.
Or even the cathode of the 2nd tube for that matter.
That would work but the output Z would be on the low side.
Perhaps you can make a network to increase the Z.
I think that would be the least bad option.
Bottom line is I don't think it can be done without big compromises.
It really needs an additional tube or transformer or even (god forbid) a fet or so
Good luck
Taking signal off the line amp tube output will cause loading effects for the balanced output for sure.
But it could be done using an attenuation network. I's just that the main output will be compromised.
You could also try taking off the line driver tube grid with a suitable attenuation network. You'll get some thing working
but again it will certainly compromise the performance of the line amp.
Another possibility is taking off from the cathode of the line amp tube with a suitable network.
Or even the cathode of the 2nd tube for that matter.
That would work but the output Z would be on the low side.
Perhaps you can make a network to increase the Z.
I think that would be the least bad option.
Bottom line is I don't think it can be done without big compromises.
It really needs an additional tube or transformer or even (god forbid) a fet or so
Good luck
RATMNL
Well-known member
wrong thread I think, this is bernd's development thread.. Use the Rude tube Build/help thread
Mark
Mark
Sure you could. No probs at all with a 10K:10K input feeding the EF86 and a 15K:600 at the output.
The step down at the output works well - I've used that ratio and am very happy with it.
Some might say that's a great way to go.
Cheers
The step down at the output works well - I've used that ratio and am very happy with it.
Some might say that's a great way to go.
Cheers
bernbrue
Well-known member
baadc0de said:
Hi,
you might need an input pad (12 or 20dB) in front of the input transformer. I found out in my prototype that the EF86 sounds fantastic when a guitar or bass is plugged in via DI. When you insert the Rude Tube in a channel, the line level signal makes the Ef86 distort in a very unpleasent way. The Rude Tube has got plenty of gain to make up the loss. Sound samples are very much appreciated. I´m always curious, with what other people feed this versatile box.
regards
Bernd
