[buldogge]

OK...Small update on the C3G...There IS output...very, very low...volume pot turned to MAX???
 
Should the C3Gs be set to EF95 or EF92?
 
What would a gain issue point o with these tubes???
 
TIA
-Mark

 

[buldogge]

Ok...Finish this conversation with myself...Obviously EF95 setting is correct.  I have output now.  Had to play with the tubes in those cheap Chinese socket though.  Basically, can't touch the adaptors/tubes or they cut out...assuming the crappy pins.
 
Guess I'll order some NOS or maybe some of those Russian sockets Mike got.
 
Anyone tried these?:
http://www.ebay.com/itm/Cinch-NOS-Vintage-Loctal-Loktal-8-pin-tube-socket-/400772825220?pt=LH_DefaultDomain_0&hash=item5d4fec0084
 
TA
-Mark

 

[TrollDragon]

These Amphenol's might be your best bet for a decent socket.
http://www.ebay.com/itm/NOS-Amphenol-8-Pin-Loctal-Loktal-Tube-Socket-for-7N7-7AF7-type-tubes-/221681170614

 

[hypnos1]

  Ok...Finish this conversation with myself...Obviously EF95 setting is correct.  I have output now.  Had to play with the tubes in those cheap Chinese socket though.  Basically, can't touch the adaptors/tubes or they cut out...assuming the crappy pins.
 
Guess I'll order some NOS or maybe some of those Russian sockets Mike got.
 
Anyone tried these?:
http://www.ebay.com/itm/Cinch-NOS-Vintage-Loctal-Loktal-8-pin-tube-socket-/400772825220?pt=LH_DefaultDomain_0&hash=item5d4fec0084
 
TA
-Mark

 
Glad you finally sorted it Mark...yes, those particular sockets do leave a lot to be desired, lol!

 

[gibosi]

......

 

[WilliamLeonhart]

Sent my LD I+ for repair yesterday. Still can't figure out why they have buzz and noises. 

 

[jaywillin]

  Sent my LD I+ for repair yesterday. Still can't figure out why they have buzz and noises. 

Little dots are known to pick up interference , my mkiii is dead silent most of the time, but occasionally it'll pick up some noise
i had a I+ that was silent all the time, and one that was noisy as hell, and not matter what i did, stayed that way
good luck !

 

[jaywillin]

  Little dots are known to pick up interference , my mkiii is dead silent most of the time, but occasionally it'll pick up some noise
i had a I+ that was silent all the time, and one that was noisy as hell, and not matter what i did, stayed that way
good luck !

 
well, it wasn't the mkiii at all, it was one of the 6hm5's being a little noisy, and that just developed
i put in my mullard 6ak5's, -silent

 

[GravitySmacked]

Hi folks,

Could do with some advice please.

I bought the following EF95 tubes for my Little Dot Mk1+

http://www.ebay.co.uk/itm/251789963059?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

However I've noticed a reasonably loud humming noise coming from them even with the volume on my Little Dot turned down.

I'm under the assumption no jumper settings need changing with these, as they are EF95's, so have I bought duds?

Cheers

 

[gibosi]

I bought the following EF95 tubes for my Little Dot Mk1+

http://www.ebay.co.uk/itm/251789963059?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

However I've noticed a reasonably loud humming noise coming from them even with the volume on my Little Dot turned down.

I'm under the assumption no jumper settings need changing with these, as they are EF95's, so have I bought duds?
 

 
They might be duds, but most likely there is nothing really wrong with them. New tubes often buzz and hum, so run them for 20 hours or so, and see if they don't quiet down.
 
Good luck!

 

[GravitySmacked]

Thanks for replying

Does this apply to 'old' new tubes? These were supposedly made in the 60's.

Also do I need to have music playing through them or is just having them switched on enough when burning in?

Sorry for the stupid questions.

 

[gibosi]

Thanks for replying

Does this apply to 'old' new tubes? These were supposedly made in the 60's.

Also do I need to have music playing through them or is just having them switched on enough when burning in?

 
Yes. Even though these Russian tubes were manufactured in 1966, they have never been used. Again, new tubes, tubes that have never been used, need to be burned-in. And it doesn't matter if they were manufactured in 1945 or 2015.
 
It is generally considered best practice to have a set of headpones plugged in when any amp is on, but not when turning it on or off. That is, it is best to turn an amp on, wait a minute or two, and then plugin the phones. And likewise, unplug the headphones first, and then turn the amp off. This protects your ears and your headphones in the event that the tube fails catastrophically. Further, I always use a very cheap pair of headphones when burning in new tubes.
 
I am not sure that it is absolutely necessary to run a signal through them, but I do.  I like to be able to listen every several hours or so, to see if they tubes are quieting down. I just run a CD player on repeat.

 

[GravitySmacked]

Thanks for the information; I'll give it a go and see how I get on

 

[GravitySmacked]

Just a quick update; I ran the tubes for about 10 or so hours today and the hum is much quieter already! So far, so good

 

[WilliamLeonhart]

   
well, it wasn't the mkiii at all, it was one of the 6hm5's being a little noisy, and that just developed
i put in my mullard 6ak5's, -silent

My LD I+ came with 6cq6 tubes, but one of the 2 went dead after I moved house, so I bought Mullards CV4010 to replace them instead. It would be worse if the tubes caused the buzz, cos I bought them in Singapore and won't return to the country in the near future... Damn