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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 625

post #9361 of 10574
Quote:
Originally Posted by TrollDragon View Post
 

Hey Mark,

 

Yes I re-cabled those myself, they are easy to get apart with just a small flat screwdriver.


The voice coil wires on the drivers are very fine and the tabs or tangs they attach to are just press fit into the driver housing. They are extremely easy to tear out which will render the driver useless. If your lucky you can reattach the wire like a few of us have done here. So you need to pop out the driver housing with great care.

 

I chose the 250 over the 600 as there is minimal if not any sound difference and the 250's will work with a greater variety of devices.


Ended up grabbing some Beyer T90s...

 

Anyone have tube pairing recommendations for these cans?  Can be EF95/EF92/EF91 or C3G and 6SN7s or Russian powers.

 

TIA

-Mark

post #9362 of 10574

Well, it appears that a "new" regulator I just got, a Tung-Sol 3DG4, was on its last legs and shorted out the first time I plugged it in to the Glenn. As designed, no damage, it just took out the amp's fuse. However, I don't have any spares around the house, so will be out and about tomorrow to see if I can find some: T4AL 250V. These appear to be common, so with a little luck the Glenn should be back in business soon.

 

So this evening, I have some time to spend with the LD and the two recently arrived ECC808. :)   

post #9363 of 10574
Quote:
Originally Posted by mordy View Post
 

http://www.areyouselling.com.au/w/wp-content/uploads/2014/10/ugly-car.jpg

 

WTF is that? :confused_face(1):

post #9364 of 10574

These guys car.......:biggrin:

post #9365 of 10574
Quote:
Originally Posted by gibosi View Post
 

Well, it appears that a "new" regulator I just got, a Tung-Sol 3DG4, was on its last legs and shorted out the first time I plugged it in to the Glenn. As designed, no damage, it just took out the amp's fuse. However, I don't have any spares around the house, so will be out and about tomorrow to see if I can find some: T4AL 250V. These appear to be common, so with a little luck the Glenn should be back in business soon.

 

So this evening, I have some time to spend with the LD and the two recently arrived ECC808. :)   

Your lucky it's just a fuse once i blew a fuse and a resistor it took me sometime to figured out why the amp sounded different after i replaced the blown fuse.There was no burning smell or discoloration on the resistor.

post #9366 of 10574

Spent much of yesterday evening with the Valvo (Hamburg) ECC808 and I think this is a terrific tube. It is definitely better than any ECC83/12AX7 I have tried in the LD.

 

Pictures and more info here:

 

http://www.head-fi.org/t/563884/little-dot-tube-amps-vacuum-tube-rolling-guide/9300#post_11405037

 

http://www.head-fi.org/t/563884/little-dot-tube-amps-vacuum-tube-rolling-guide/9300#post_11410837

 

Again the pinout is different than other double triodes I have tried, so for those using an external 9 pin socket it will be necessary to rewire accordingly. 

 

9 Pin socket                                 Left LD socket                    Right LD socket
 
1 grid section 2                                                                                   1
2 cathode section   2                                                                           2
3 anode section 2                                                                                5
4 heater - external PS (or LD pin 3)                                                       (3)          
5 heater - external PS (or LD pin 4)                                                       (4)
6 shield - no connection                                        
7 anode section 1                                    5
8 cathode section 1                                 2
9 grid section 1                                       1

 

Have fun! :)

 

Edit: Heater current is only 340ma, so the LD's internal heaters will be fine.


Edited by gibosi - 3/21/15 at 3:33pm
post #9367 of 10574
Quote:
Originally Posted by i luvmusic 2 View Post
 

Your lucky it's just a fuse once i blew a fuse and a resistor it took me sometime to figured out why the amp sounded different after i replaced the blown fuse.There was no burning smell or discoloration on the resistor.

 

Yes, I was lucky. And this morning, found replacement fuses close by and the Glenn is alive and well again. :)

post #9368 of 10574
Quote:
Originally Posted by gibosi View Post
 
Quote:
Originally Posted by i luvmusic 2 View Post
 

Your lucky it's just a fuse once i blew a fuse and a resistor it took me sometime to figured out why the amp sounded different after i replaced the blown fuse.There was no burning smell or discoloration on the resistor.

 

Yes, I was lucky. And this morning, found replacement fuses close by and the Glenn is alive and well again. :)

The 6SN7 GTB was the one shorted in my CRACK the fuse did not blow right away i usually turned the amp on and leaved it for a few minutes before listening and i noticed the tube was glowing bright blue.

 

I'am glad that your amp is all well.

post #9369 of 10574

Hi Oskari,

 

Came across the funny picture of the fat car, but I cannot find any information about it, except for that one site calls it "Obese Cadillac."

 

However, I discovered that you can search Google Images using a picture:

 

https://images.google.com/imghp?hl=en&gws_rd=ssl

 

Just drag the picture into the search box and that's it. I tried your Avatar of the Finnish landscape and found several of your recent posts on Head-Fi.

 

Nothing is safe any more....

post #9370 of 10574
Quote:
Originally Posted by mordy View Post
 

However, I discovered that you can search Google Images using a picture

 

I actually tried that but couldn't find any information.

 

I tried your Avatar of the Finnish landscape

 

That, by the way, is a night view from the hotel room window at Koli National Park.

post #9371 of 10574

Remember the Internet Bubble? Well, everybody knew it would not last, but i took a chance on some investments and pulled out $1400 when everything was going up and bought a state of the art headphone amp: The Headroom Max. The year was 1999. I also got a pair of Sennheiser HD600 headphones. Then the bubble burst, but I had my gear at least.

 

Why did I go to such excess? (The amp in today's dollars would cost around $2400.)

 

The reason was that I wanted to savor Class A sound, and i could not afford a $20,000 system, so I figured, let me try this at least. Sad to say, even though the amp reproduced everything very well, I could not get used to listening through headphones and the ss sound of the amp.

 

 

5780911_1_l.jpg

Image result for Pics Headroom Max amp

 

One such amp was advertised on Head-Fi:

 

http://www.head-fi.org/t/468734/sold-headroom-max-original-owner

 

Can anybody give me suggestions on how much it is worth and where to sell it? It has been sitting unused for a long time, but is in perfect condition and works perfectly as well.

post #9372 of 10574
Hi guyz just 1 question:my volume pot on the LD MK3 became so noisy on left channel,what can i do?

Thanks!
Edited by bobbyblack - 3/24/15 at 7:57am
post #9373 of 10574
Quote:
Originally Posted by bobbyblack View Post

Hi guyz just 1 question:my volume pot on the LD MK3 became so noisy on left channel,what can i do?

Thanks!

Try cleaning it with Deoxit or something similar usually that does it for awhile but be careful removing pot assembly  not to break off wires they are very easy to break. Lately i changed the pot to a dact type 21 stepped attenuator 100k 2a3 works great 

 
 

http://www.ebay.com/itm/DACT-Type-21-Stepped-Attenuator-Potentiometer-100K-2A3-/201239685917?pt=LH_DefaultDomain_0&hash=item2edad1eb1d                                                                                                                    

                                                                               


Edited by MIKELAP - 3/24/15 at 10:08am
post #9374 of 10574
Quote:
Originally Posted by MIKELAP View Post

Try cleaning it with Deoxit or something similar usually that does it for awhile but be careful removing pot assembly  not to break off wires they are very easy to break. Lately i changed the pot to a dact type 21 stepped attenuator 100k 2a3 works great 
 
 
http://www.ebay.com/itm/DACT-Type-21-Stepped-Attenuator-Potentiometer-100K-2A3-/201239685917?pt=LH_DefaultDomain_0&hash=item2edad1eb1d                                                                                                                    

                                                                               
Is hard to change the pot?If not i'm gonna buy it,thank you !
post #9375 of 10574
Quote:
Originally Posted by bobbyblack View Post
 
Quote:
Originally Posted by MIKELAP View Post

Try cleaning it with Deoxit or something similar usually that does it for awhile but be careful removing pot assembly  not to break off wires they are very easy to break. Lately i changed the pot to a dact type 21 stepped attenuator 100k 2a3 works great 
 
 
http://www.ebay.com/itm/DACT-Type-21-Stepped-Attenuator-Potentiometer-100K-2A3-/201239685917?pt=LH_DefaultDomain_0&hash=item2edad1eb1d                                                                                                                    

                                                                               
Is hard to change the pot?If not i'm gonna buy it,thank you !

No, if you can solder and have a tester to identify what wire goes where. 

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