The Rude Tube

[tommypiper]

Your audio file link is broken.

I get a blank page, "Safari can’t open the specified address."

 

[guavatone]

I may be interested.  It may take awhile to get to it.

It would be fairly easy to mod the Orange 86 by plopping a tube in the back panel

I am listening to the youtube video.  Sis you take their sample or did you just play a similar riff?

What are you using for the inductor/choke?

Oh, did you just flip polarity at the output, since the signal's polarity is reversed by the 6AS6?

 

[bernbrue]

Attached a pdf file with the schematic. No, I didn´t take their audio file, I just played a similar riff. Concerning inductors I had some leftovers from my gyraf pultec build. Digikey part number TK4425-ND.
regards
Bernd

 

[bernbrue]

Oh, did you just flip polarity at the output, since the signal's polarity is reversed by the 6AS6?

Ah, almost forgot about this. I have to do detailed measurements. I would probably flip the ouput.
regards
Bernd

 

[guavatone]

Yes.  Just flip the Output Transformer secondary.

 

[EEMO1]

NICE WORK!!! 

 

[leadbreath]

you sir are a genius!!!!!!!!

 

[bernbrue]

When kids play with their new toy  ;D
Attention: loud!!!!!!!!

http://www.twin-x.com/groupdiy/albums/userpics/rude_tube_demo_2.mp3

 

[bernbrue]

Just a guess, but possibly the sqash modes are realized by reducing H.T. to G2. So you´ve got peak mode with and sqash modes without applying bias. Not tested !!

 

[tommypiper]

When kids play with their new toy  ;D
Attention: loud!!!!!!!!

http://www.twin-x.com/groupdiy/albums/userpics/rude_tube_demo_2.mp3

Link still broken.

 

[bernbrue]

When kids play with their new toy  ;D
Attention: loud!!!!!!!!

http://www.twin-x.com/groupdiy/albums/userpics/rude_tube_demo_2.mp3

Link still broken.

Works fine here. Did you try right click and "save as" ?
regards
Bernd

 

[Hank Dussen]

Just curious: what does the meter actually show? Compression? Amount of distortion?

 

[mylesgm]

Sounds pretty cool!  I've been reading with interest...

 

[bernbrue]

Just curious: what does the meter actually show? Compression? Amount of distortion?

The meter shows the current going through the cathode of the 6AS6. When the 6AS6 is totally overdriven the meter starts to twist according to the input signal.
regards
Bernd

 

[bernbrue]

Hi,
schematic updated (see first post)
I did some fine tuning. Changes made in EF86 loadline and output section of the 6AS6. Now it works like a charm. The cut off frequency of the LPF should be checked and also its position. I put it after the 6AS6 valve stage. Change values to taste.
regards
Bernd

 

[leadbreath]

sounds really good!!

i think i will knock one of these out.
i cant seem seem to find the sowter 3528 transformer on their website?
where did u get this transformer??

 

[bernbrue]

Hi,
you don´t exactly need  that type of input transformer. Any 1:1 transformer should work. Choose to your taste.
regards
Bernd

 

[bernbrue]

Hi,
I always wondered how 10 different functions (Triode, Pentode, 5 peak and 3 sqash modes) can be realized with a simple 1x12 Lorlin. Would anyone have a look at the schematic attached and check whether this switch arrangement could work? There are still 6 further positions left for experiments. The sqash modes seem to be realized with almost starving G2 voltage which could be realized with a huge resistor in front of G2.
regards
Bernd

 

[mad.ax]

Given that G2 is permanently wired to the cathode, I wonder if we can still call it a penthode...? Looks more like a tetrode to me

What if you want to starve G2 (squash mode) AND have a peak in the same time? That's achievable with a separate switch for squash...

Axel

 

[bernbrue]

Given that G2 is permanently wired to the cathode, I wonder if we can still call it a penthode...? Looks more like a tetrode to me

What if you want to starve G2 (squash mode) AND have a peak in the same time? That's achievable with a separate switch for squash...

Axel

G3 is wired to cathode, G2 is wired as penthode.
regards
Bernd