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Hoffman Amps Forum image Author Topic: Anybody have a 5E9-A layout?  (Read 5027 times)

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Offline SLW

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Anybody have a 5E9-A layout?
« on: October 14, 2013, 01:43:33 pm »
Does anybody out there have a layout for a 5E9-A?  I quickly searched and did not find one.  It seems folks have been building them.   Are you guys just following Fender's layout? 

SLW
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Offline floyd

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stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #2 on: October 14, 2013, 02:40:04 pm »
SLW ,

For the heater do not follow schematic or layout . One heater side are to the ground , this make amp noisy   .

Use two  twisted wire for heater ( like Blackface amps )  circuit with a center tap to ground ( on Power Transformer ) or artificial center tap with two 100 ohms resistor

Offline SLW

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Re: Anybody have a 5E9-A layout?
« Reply #3 on: October 15, 2013, 05:54:10 am »
The heaters will be hooked up in the new modern way with an artificial center tap.  I was hoping to find a hoffman style layout.  I have looked at the hoffman layout for the 5E3.  I could start with that and modify it for the Tremolux.  I thought I would ask here if anybody has one they used.

SLW
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stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #4 on: October 15, 2013, 06:05:30 am »
Look a any Fender Blackface schematic

Any Fender Blackface amp use the right heater wiring you need, do the same . Forget if it is not same tubes or more tubes . Heater circuit are always same .

stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #5 on: October 15, 2013, 06:17:30 am »
The heaters will be hooked up in the new modern way with an artificial center tap.  I was hoping to find a hoffman style layout.  I have looked at the hoffman layout for the 5E3.  I could start with that and modify it for the Tremolux.  I thought I would ask here if anybody has one they used.

SLW

No need sketch or layout for heater ;

Your power transformer have two wires for heater if no center tap . Solder one wire to one side ( pin 4-5 ) of heater pin all the 12XX7 tubes heater and the other wire to the other side heater pin ( 9 ) on each 12XX7 tubes.

6V6 heater is pin 2 and 7

On each 12XX7 tube , heater pin 4-5 shoud be solder together

stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #6 on: October 15, 2013, 06:29:02 am »
Or in other word ;  do the heaterwiring  like you original layout except remove tube 's heater side from the ground and put the second wire to these socket pin.

Short skettch , just need two 100 ohms resistor from each heater wire to grounf fot Center tap
 
                        6V6 pin 7     12XX7pin4-5   12XX7 pin4-5  12XX7 pin 4-5  12XX7 pin4-5
PT heater _________o__________o___________o____________o___________o


                        6V6 pin 2     12XX7 pin9     12XX7 pin 9   12XX7 pin 9       12XX7 pin 9
PT heater _________o___________o___________o___________o____________o

stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #7 on: October 15, 2013, 06:32:05 am »

 Artificial center tap with two 100 ohms resistor ;

Middle of the pages

www.valvewizard.co.uk/heater.html

Offline tubeswell

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Re: Anybody have a 5E9-A layout?
« Reply #8 on: October 15, 2013, 10:33:15 am »
A bus stops at a bus station. A train stops at a train station. On my desk, I have a work station.

stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #9 on: October 15, 2013, 11:17:22 am »
Very nice amp Tubeswell

Offline HotBluePlates

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Re: Anybody have a 5E9-A layout?
« Reply #10 on: October 15, 2013, 12:10:43 pm »
I wish I never sold the 5E9 I used to have...

Offline ac427v

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Re: Anybody have a 5E9-A layout?
« Reply #11 on: October 15, 2013, 01:06:52 pm »
I enjoy building with turret boards and find Hoffman's layouts work great. With a little creative cut and pasting you could use Doug's 5E3 layout for the preamp circuit and his AB743 layout for the phase inverter, power amp and trem sections. Your parts values would be different and you don't want the negative feedback circuit but the placement of parts on the board would be proper.
Craig

Offline HotBluePlates

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Re: Anybody have a 5E9-A layout?
« Reply #12 on: October 15, 2013, 02:15:08 pm »
That's because in these amps, the chassis was used as one of the "heater wires" throughout.

Yes, we don't do it that way anymore.


EDIT: Oops... you were talking about the power cord ground wire.  :BangHead:
« Last Edit: October 15, 2013, 04:53:29 pm by HotBluePlates »

Offline SLW

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Re: Anybody have a 5E9-A layout?
« Reply #13 on: October 15, 2013, 02:57:21 pm »
Boy Tubeswell that is one pretty amp you have there!

Thanks for your suggestions stratele52.  It is very kind of you to offer help.  I have built a few amps now with two heater wires and the artificial center tap.  I understand that pretty well. 

When looking at the layout from the library I noticed the trem tube was next to the 6V6's.  On the amps I have built up to now the PI tube is next to the power tubes so I found it strange.  I am sure Leo had his reasons for this and who am I to argue with what has obviously worked.  But I can't help but wonder if it makes more sense to switch them.

SLW
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stratele52

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Re: Anybody have a 5E9-A layout?
« Reply #14 on: October 15, 2013, 03:06:22 pm »
In some amps tremolo tube need to use bias of the 6V6 , closser is often easier.

Offline lego4040

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Re: Anybody have a 5E9-A layout?
« Reply #15 on: November 17, 2013, 06:44:47 pm »
watts tube audio makes the turret board for this amp. If you wanted to build this amp what kit would be the closest to it for all the other parts? Looking at tedweber amp kits the 5E5A has the right amount of tubes and pots but does have a 15" speaker int the kit. I am not sure what transformer are needed. I just found this thread and listened to some videos of this amp and it is incredible. How there isnt a kit out there is unbelievable. Obviously you would have to source out other needed board parts and possible value changes to this

Offline HotBluePlates

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Re: Anybody have a 5E9-A layout?
« Reply #16 on: November 17, 2013, 10:26:12 pm »
... If you wanted to build this amp what kit would be the closest to it for all the other parts? Looking at tedweber amp kits the 5E5A has the right amount of tubes and pots but does have a 15" speaker int the kit. ...

The 5E5 is the tweed Pro, and has 2x 6L6's. The 5E9 was the tweed Tremolux, and had 2x 6V6's.

The right kit to get (assuming you never find one someone claims is exactly the 5E9) would be the 5E3 Deluxe. That's because the "Tremolux" was the "Tremolo-equipped Deluxe". It was basically the 5D3 Deluxe with tremolo added, but in a bigger cabinet.

Offline SLW

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Re: Anybody have a 5E9-A layout?
« Reply #17 on: November 18, 2013, 07:27:43 pm »
I ended up having Mr. Hoffman custom drill a board for me.  I ended up copying the fender layout with a couple of small changes.  I moved all of the 68K resistors to the input jacks.  I added screen resistors to the board and I have a spare set of turrets in case I want to separate the cathodes of V1.  I bought all of my parts first.  I printed out the turret board template, put double sided tape down the middle and stuck the parts in place.  I think it worked out well. 
always tinkerin' with something

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Offline lego4040

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Re: Anybody have a 5E9-A layout?
« Reply #18 on: November 20, 2013, 08:20:24 pm »
 :sad2: My bad, what I meant to say was that the chassis faceplate looked right and right amount of tube sockets. I never even looked at the circuit, sorry. Can we get a picture of the board if you got it? I would prefer Hoffmans style over watts, I like the Idea of having everything on one board

 


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