[CADCAM]

Can anyone please tell me the differences, if any, between the black base Sylvania Gold Brand 6080 and the white base?
thanks for any and all info

 

[Dogmatrix]

Can anyone please tell me the differences, if any, between the black base Sylvania Gold Brand 6080 and the white base?
thanks for any and all info

As always there is a high level of rebranding going on so it is always better to judge by internal structure
Most of the black base GB tubes I see look very much like GE and the white version I see in equal numbers branded Philips and Sylvania

 

[Velozity]

Hahah! This thread was what sent me down the 6AS7 rabbit hole. I’ve got seven different tubes, and four of them are in pairs, so I really don’t need any more. But if something cheap and interesting comes up I’ll snag it

I haven’t started collecting 6SN7s fortunately, or else I’d been bankrupt.

I thought the 6AS7 rabbit hole was deep, but it pales in comparison to the EL34/6L6/KT66/KT88 rabbit hole. Gathering tubes for my upcoming SET amp is proving very account-draining. By comparison, a pair of GEC 6AS7G is $500 and a pair of GEC (Genalex/Gold Lion) KT88 is $1000 on a good day. Western Electric 350B's?? $1200+...

 

[UntilThen]

I thought the 6AS7 rabbit hole was deep, but it pales in comparison to the EL34/6L6/KT66/KT88 rabbit hole. Gathering tubes for my upcoming SET amp is proving very account-draining. By comparison, a pair of GEC 6AS7G is $500 and a pair of GEC (Genalex/Gold Lion) KT88 is $1000 on a good day. Western Electric 350B's?? $1200+...

Tell me about it.

 

[fuzzroffe]

I thought the 6AS7 rabbit hole was deep, but it pales in comparison to the EL34/6L6/KT66/KT88 rabbit hole. Gathering tubes for my upcoming SET amp is proving very account-draining. By comparison, a pair of GEC 6AS7G is $500 and a pair of GEC (Genalex/Gold Lion) KT88 is $1000 on a good day. Western Electric 350B's?? $1200+...

Need a GEC tube? I’ve got one, lightly used I’ve been wondering if I should try it in my KT88 amp…

 

[CaptainFantastic]

I added one more 6520 to my collection. I knew from the pictures when purchasing it (and low price) that this one is different than my other two. My other two resemble 5998s in build, while this one looks like a 6AS7G. Still, all three are labeled 6520.

1st tube - the new arrival, solid plates, rectangular plastic pieces at the top, triangle pointed metal ends from the middle horizontal plate, so just like the 6AS7G on the extreme right (except that 6AS7G has copper? wiring on the sides of the plates)
2nd and 3rd tubes - 6520s resembling 5998s, with domino plates

Testing the sound now. Don't in any way trust me because I am a novice, but I think it's more neutral than the other two 6520s which despite looking like 5998s are warmer/bass-ier, it seems to me.

 

[SHIMACM]

To colleagues here on the topic, I'm in need of a little help.

I bought five valves on Ebay Tung-Sol 6080 and received them today.

I tested them all on my Darkvoice, but one of them started giving a kind of short inside it giving loud pops on my phone.

I immediately turned off the amplifier.

I unplugged the phone and then turned the amplifier back on.

The valve worked normally.

I plugged in the phone again and the sound was normal.

Has anyone ever witnessed something like this?

Should I discard this valve?

 

[adeadcrab]

To colleagues here on the topic, I'm in need of a little help.

I bought five valves on Ebay Tung-Sol 6080 and received them today.

I tested them all on my Darkvoice, but one of them started giving a kind of short inside it giving loud pops on my phone.

I immediately turned off the amplifier.

I unplugged the phone and then turned the amplifier back on.

The valve worked normally.

I plugged in the phone again and the sound was normal.

Has anyone ever witnessed something like this?

Should I discard this valve?

My Bendix 6080WB had this issue; one of the pair did this after buying it on ebay. Who knows how many years it was in storage, its pins oxidising... I cleaned the pins with deoxit red and tried it again - been years and years of use with no pops since.

 

[SHIMACM]

My Bendix 6080WB had this issue; one of the pair did this after buying it on ebay. Who knows how many years it was in storage, its pins oxidising... I cleaned the pins with deoxit red and tried it again - been years and years of use with no pops since.

In your bandix did you get to see the short inside the tube? Or did you just hear the crackles?

 

[adeadcrab]

In your bandix did you get to see the short inside the tube? Or did you just hear the crackles?

I heard a loud 'crack', and yeah the tube actually arced and looked like lightning in a bottle... wiser minds would tell you this overworked tube needs to be retired for good.. I'm using that pair of tubes in my amp at the moment... the worst is they occasionally hum for an hour or two in the background with no music playing.

 

[gibosi]

To colleagues here on the topic, I'm in need of a little help.

I bought five valves on Ebay Tung-Sol 6080 and received them today.

I tested them all on my Darkvoice, but one of them started giving a kind of short inside it giving loud pops on my phone.

I immediately turned off the amplifier.

I unplugged the phone and then turned the amplifier back on.

The valve worked normally.

I plugged in the phone again and the sound was normal.

Has anyone ever witnessed something like this?

Should I discard this valve?

As @adeadcrab pointed out, this is not uncommon, especially with tubes that have been stored for many years. I do not recommend that you discard this valve. But I do recommend that you turn the amp on and wait 5 or 10 minutes before connecting your phones. This is enough time for the valve to heat up to its normal operating temperature and stabilize. And it is likely that you will be able to use this valve for many years.

 

[SHIMACM]

I heard a loud 'crack', and yeah the tube actually arced and looked like lightning in a bottle... wiser minds would tell you this overworked tube needs to be retired for good.. I'm using that pair of tubes in my amp at the moment... the worst is they occasionally hum for an hour or two in the background with no music playing.

As @adeadcrab pointed out, this is not uncommon, especially with tubes that have been stored for many years. I do not recommend that you discard this valve. But I do recommend that you turn the amp on and wait 5 or 10 minutes before connecting your phones. This is enough time for the valve to heat up to its normal operating temperature and stabilize. And it is likely that you will be able to use this valve for many years.

Thanks for the explanations.

 

[DenverW]

I would have a differing opinion on that tube. Definitely test it first as suggested above. If you got a whole set I would stick to the other ones.

a tube sourced from eBay could have an issue. That arc could end up causing an issue with your headphones, and not worth the risk imho. Be careful.

 

[Deceneu808]

This just came in

 

[PsilocybinCube]

This just came in

That tube looks minty fresh. Including the minty text and super-clean pins.