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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 389

post #5821 of 10504
Mikelap, let me check it out, thanks again. In any case, i bought a bunch of ef95 type tubes off ebay so I will be occupied for awhile. But am really, really itching to try the external power supply mod as advised by Gibosi above..
post #5822 of 10504
Quote:
Originally Posted by hypnos1 View Post

Excuse my ignorance, but where does anode resistance come in, as opposed to cathode resistance?...Would appreciate your enlightenment.:confused_face(1):


This page here can explain the various resistors and their purpose better than I can.

The author was trying to play on the xxx for dummies foolishness of back in the day.

http://www.diystompboxes.com/pedals/tubedummy.html

 

Quote:
Originally Posted by i luvmusic 2 View Post
 

Hi TD,

       If replaced those resistors with say 10W and used a external power supply would it be still put alot of stress on the transformer?


Yes... The anode resistor, those power resistors and the transformer doesn't provide enough B+ voltage or current...

Also I do not possess enough knowledge of tube theory or the math to calculate what you would have to change to get the LD board to run those tubes in a properly configured circuit.

 

Here are some tube parameter explanations.

http://www.allaboutcircuits.com/vol_3/chpt_13/8.html

 

Here is a plenitude of tube books all in the public domain.

http://www.tubebooks.org/technical_books_online.htm

 

:beerchug:

post #5823 of 10504

     I need to stop screwing around with LD circuits because i'm making it sounding like crap i took apart the LD1 tried transfering it in a new  chassis after that it hum like crazy and as soon as i put it back in it's original case it's dead silent.I did ground the whole chassis and it did reduce the hum a bit bundled all the cables but that did not help at all it actually made it hum even more.enough for me for now i'am just going to enjoy them the way they are made and just roll tubes speaking of tubes just received my 8 RCA 6SN7 and i love them all they really are better than the first few sets of 6SN7 i have.

    Thank you TD for those Links!:beerchug:

post #5824 of 10504
Quote:
Originally Posted by i luvmusic 2 View Post
 

     I need to stop screwing around with LD circuits because i'm making it sounding like crap i took apart the LD1 tried transfering it in a new  chassis after that it hum like crazy and as soon as i put it back in it's original case it's dead silent.I did ground the whole chassis and it did reduce the hum a bit bundled all the cables but that did not help at all it actually made it hum even more.enough for me for now i'am just going to enjoy them the way they are made and just roll tubes speaking of tubes just received my 8 RCA 6SN7 and i love them all they really are better than the first few sets of 6SN7 i have.

    Thank you TD for those Links!:beerchug:


Enjoy the Links and all the reading while listening to your new RCA's. :L3000:

post #5825 of 10504

I think I have found a possible successor to my LD 1+: the Cavalli Liquid Glass, a "Tube-Roller's Dream Amplifier." Like the LD 1+ it is hybrid and would allow me to roll almost all my double triodes.

 

https://www.cavalliaudio.com/index.php?p=product_details&pId=1

 

However, there are a few drawbacks...  I won't be able roll 8v and 25v tubes. Further, the amp uses pairs rather than singles, so tube rolling is more expensive. And finally, the price is $2,950, which is a bit more than I can handle unless I win big at the lottery or find a sugar mama. lol :)

post #5826 of 10504
Yes gibosi

That is a very nice looking amp with great protection and auto biasing features. End game amplifier for sure with your HD700's until you get a taste of Audeze's... biggrin.gif
post #5827 of 10504
And like I said to MIKELAP with the Woo, its only money dude, you can't take it with you. wink.gif
post #5828 of 10504
Quote:
Originally Posted by gibosi View Post
 

I think I have found a possible successor to my LD 1+: the Cavalli Liquid Glass, a "Tube-Roller's Dream Amplifier." Like the LD 1+ it is hybrid and would allow me to roll almost all my double triodes.

 

https://www.cavalliaudio.com/index.php?p=product_details&pId=1

 

However, there are a few drawbacks...  I won't be able roll 8v and 25v tubes. Further, the amp uses pairs rather than singles, so tube rolling is more expensive. And finally, the price is $2,950, which is a bit more than I can handle unless I win big at the lottery or find a sugar mama. lol :)

Well you could mod it for tubes with voltages greater then 6v lol

post #5829 of 10504
Quote:
Originally Posted by gibosi View Post
 

I think I have found a possible successor to my LD 1+: the Cavalli Liquid Glass, a "Tube-Roller's Dream Amplifier." Like the LD 1+ it is hybrid and would allow me to roll almost all my double triodes.

 

https://www.cavalliaudio.com/index.php?p=product_details&pId=1

 

However, there are a few drawbacks...  I won't be able roll 8v and 25v tubes. Further, the amp uses pairs rather than singles, so tube rolling is more expensive. And finally, the price is $2,950, which is a bit more than I can handle unless I win big at the lottery or find a sugar mama. lol :)

Is Liquid fire similar $2000.00 canuck dollars thats about $1700.00 U.S      http://www.canuckaudiomart.com/details/649105006-cavalli_audio_liquid_fire/

post #5830 of 10504
Quote:
Originally Posted by TrollDragon View Post

And like I said to MIKELAP with the Woo, its only money dude, you can't take it with you. wink.gif

By the way thanks for your advise there TD               

lol .

post #5831 of 10504
Quote:
Originally Posted by TrollDragon View Post

Yes gibosi

That is a very nice looking amp with great protection and auto biasing features. End game amplifier for sure with your HD700's until you get a taste of Audeze's... biggrin.gif

 

post #5832 of 10504

Here is my new adapter(6SN7,6DJ8,12A..EF 91..and for 6SN7 Power Adapter for MK III)  for LD 1 and MK III it's made out of recycled materials(Because i'am CHEAP or FRUGAL as per Mordy).The LD 1 is inside the adapter Chassis and i finally resolved the hum problem i had when i was working on LD 1(Disconnected ground inside LD 1 Chassis)I can't decide about the finish Polish the aluminum or paint the whole case or leaved it the way it is so you can see all the ugly pencil marked and scratches on the surface.

 

post #5833 of 10504
Quote:
Originally Posted by MIKELAP View Post
 

Is Liquid fire similar $2000.00 canuck dollars thats about $1700.00 U.S      http://www.canuckaudiomart.com/details/649105006-cavalli_audio_liquid_fire/

 

The Liquid Fire is quite different in that it does not encourage tube rolling. There are 6 screws on the bottom that have to be removed to again access to the tubes, 6DJ8s I believe. Apparently the amp is no longer available from Cavalli, as it does not appear on their website.

 

While the Liquid Glass looks to be a great amp, it has a solid state output like my LD 1+, so it isn't really what I want. And unfortunately, I was very disappointed to learn that the Crack is designed for headphones 200 ohms and higher. My HD700s are 150 ohms so back to square one.... :(

post #5834 of 10504
Quote:
Originally Posted by i luvmusic 2 View Post
 

Here is my new adapter(6SN7,6DJ8,12A..EF 91..and for 6SN7 Power Adapter for MK III)  for LD 1 and MK III 

 

Wow! :)

post #5835 of 10504
Quote:
Originally Posted by gibosi View Post
 

 

The Liquid Fire is quite different in that it does not encourage tube rolling. There are 6 screws on the bottom that have to be removed to again access to the tubes, 6DJ8s I believe. Apparently the amp is no longer available from Cavalli, as it does not appear on their website.

 

While the Liquid Glass looks to be a great amp, it has a solid state output like my LD 1+, so it isn't really what I want. And unfortunately, I was very disappointed to learn that the Crack is designed for headphones 200 ohms and higher. My HD700s are 150 ohms so back to square one.... :(

At least on the Woo i can use my 6DJ8 varietys good thing i had bought pairs .

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